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2 }\n[1, 2, 3].count(&.< 2)\n[0, 1, 2].count(&.zero?)\n[0, 1, 2].count(&.!= 0)\n```\n\nYAML configuration example:\n\n```\nPerformance/SizeAfterFilter:\n Enabled: true\n FilterNames:\n - select\n - reject\n```","summary":"This rule is used to identify usage of size calls that follow filter.
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Crystal::Assign)","location":{"filename":"src/ameba/rule/style/constant_names.cr","line_number":31,"url":"https://github.com/crystal-ameba/ameba/blob/cd18c6a0/src/ameba/rule/style/constant_names.cr#L31"},"def":{"name":"test","args":[{"name":"source","doc":null,"default_value":"","external_name":"source","restriction":""},{"name":"node","doc":null,"default_value":"","external_name":"node","restriction":"Crystal::Assign"}],"double_splat":null,"splat_index":null,"yields":null,"block_arg":null,"return_type":"","visibility":"Public","body":"if (target = node.target).is_a?(Crystal::Path)\n name = target.names.first\n expected = name.upcase\n if name.in?(expected, name.camelcase)\n return\n end\n issue_for(target, MSG % {expected, 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","abstract":false,"args":[],"args_string":"(&block : Crystal::Token -> _)","args_html":"(&block : Crystal::Token -> _)","location":{"filename":"src/ameba/tokenizer.cr","line_number":45,"url":"https://github.com/crystal-ameba/ameba/blob/cd18c6a0/src/ameba/tokenizer.cr#L45"},"def":{"name":"run","args":[],"double_splat":null,"splat_index":null,"yields":1,"block_arg":{"name":"block","doc":null,"default_value":"","external_name":"block","restriction":"(Crystal::Token -> _)"},"return_type":"","visibility":"Public","body":"begin\n run_normal_state(@lexer, &block)\n true\nrescue e : Crystal::SyntaxException\n false\nend"}}],"macros":[],"types":[]}]}]}}
\ No newline at end of file
diff --git a/search-index.js b/search-index.js
index d28e20e3..4b0e8537 100644
--- a/search-index.js
+++ b/search-index.js
@@ -1 +1 @@
-crystal_doc_search_index_callback({"repository_name":"ameba","body":"\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n- [About](#about)\n- [Usage](#usage)\n * [Watch a tutorial](#watch-a-tutorial)\n * [Run in parallel](#run-in-parallel)\n- [Installation](#installation)\n * [As a project dependency:](#as-a-project-dependency)\n * [OS X](#os-x)\n * [Docker](#docker)\n * [From sources](#from-sources)\n- [Configuration](#configuration)\n * [Sources](#sources)\n * [Rules](#rules)\n * [Explain issues](#explain-issues)\n * [Inline disabling](#inline-disabling)\n- [Editors & integrations](#editors--integrations)\n- [Credits & inspirations](#credits--inspirations)\n- [Contributors](#contributors)\n\n## About\n\nAmeba is a static code analysis tool for the Crystal language.\nIt enforces a consistent [Crystal code style](https://crystal-lang.org/reference/conventions/coding_style.html),\nalso catches code smells and wrong code constructions.\n\nSee also [Roadmap](https://github.com/crystal-ameba/ameba/wiki).\n\n## Usage\n\nRun `ameba` binary within your project directory to catch code issues:\n\n```sh\n$ ameba\nInspecting 107 files\n\n...............F.....................F....................................................................\n\nsrc/ameba/formatter/flycheck_formatter.cr:4:33\n[W] Lint/UnusedArgument: Unused argument `location`\n> source.issues.each do |e, location|\n ^\n\nsrc/ameba/formatter/base_formatter.cr:12:7\n[W] Lint/UselessAssign: Useless assignment to variable `s`\n> return s += issues.size\n ^\n\nFinished in 542.64 milliseconds\n129 inspected, 2 failures\n```\n\n### Watch a tutorial\n\n\n\n[🎬 Watch the LuckyCast showing how to use Ameba](https://luckycasts.com/videos/ameba)\n\n### Run in parallel\n\nStarting from 0.31.0 Crystal [supports parallelism](https://crystal-lang.org/2019/09/06/parallelism-in-crystal.html).\nIt allows to run linting in parallel too.\nIn order to take advantage of this feature you need to build ameba with preview_mt support:\n\n```sh\n$ crystal build src/cli.cr -Dpreview_mt -o bin/ameba\n$ make install\n```\n\nSome quick benchmark results measured while running Ameba on Crystal repo:\n\n```sh\n$ CRYSTAL_WORKERS=1 ameba #=> 29.11 seconds\n$ CRYSTAL_WORKERS=2 ameba #=> 19.49 seconds\n$ CRYSTAL_WORKERS=4 ameba #=> 13.48 seconds\n$ CRYSTAL_WORKERS=8 ameba #=> 10.14 seconds\n```\n\n## Installation\n\n### As a project dependency:\n\nAdd this to your application's `shard.yml`:\n\n```yaml\ndevelopment_dependencies:\n ameba:\n github: crystal-ameba/ameba\n version: ~> 0.13.0\n```\n\nBuild `bin/ameba` binary within your project directory while running `shards install`.\n\nYou may also want to use it on [Travis](travis-ci.org):\n\n```yaml\n# .travis.yml\nlanguage: crystal\ninstall:\n - shards install\nscript:\n - crystal spec\n - crystal bin/ameba.cr\n```\n\nUsing this config Ameba will inspect files just after the specs run. Travis will also fail\nthe build if some problems detected.\n\n### OS X\n\n```sh\n$ brew tap veelenga/tap\n$ brew install ameba\n```\n\n### Docker\n\nBuild the image:\n\n```sh\n$ docker build -t crystal-ameba/ameba .\n```\n\nTo use the resulting image on a local source folder, mount the current (or target) directory into `/src`:\n\n```sh\n$ docker run -v $(pwd):/src crystal-ameba/ameba\n```\n\nAlso available on DockerHub: https://hub.docker.com/r/veelenga/ameba\n\n### From sources\n\n```sh\n$ git clone https://github.com/crystal-ameba/ameba && cd ameba\n$ make install\n```\n\n## Configuration\n\nDefault configuration file is `.ameba.yml`.\nIt allows to configure rule properties, disable specific rules and exclude sources from the rules.\n\nGenerate new file by running `ameba --gen-config`.\n\n### Sources\n\n**List of sources to run Ameba on can be configured globally via:**\n\n- `Globs` section - an array of wildcards (or paths) to include to the\n inspection. Defaults to `%w(**/*.cr !lib)`, meaning it includes all project\n files with `*.cr` extension except those which exist in `lib` folder.\n- `Excluded` section - an array of wildcards (or paths) to exclude from the\n source list defined by `Globs`. Defaults to an empty array.\n\nIn this example we define default globs and exclude `src/compiler` folder:\n\n``` yaml\nGlobs:\n - **/*.cr\n - !lib\n\nExcluded:\n - src/compiler\n```\n\n**Specific sources can be excluded at rule level**:\n\n``` yaml\nStyle/RedundantBegin:\n Excluded:\n - src/server/processor.cr\n - src/server/api.cr\n```\n\n### Rules\n\nOne or more rules, or a one or more group of rules can be included or excluded\nvia command line arguments:\n\n```sh\n$ ameba --only Lint/Syntax # runs only Lint/Syntax rule\n$ ameba --only Style,Lint # runs only rules from Style and Lint groups\n$ ameba --except Lint/Syntax # runs all rules except Lint/Syntax\n$ ameba --except Style,Lint # runs all rules except rules in Style and Lint groups\n```\n\nOr through the configuration file:\n\n``` yaml\nStyle/RedundantBegin:\n Enabled: false\n```\n\n### Explain issues\n\nAmeba allows you to dig deeper into an issue, by showing you details about the issue\nand the reasoning by it being reported.\n\nTo be convenient, you can just copy-paste the `PATH:line:column` string from the\nreport and paste behind the `ameba` command to check it out.\n\n```sh\n$ ameba crystal/command/format.cr:26:83 # show explanation for the issue\n$ ameba --explain crystal/command/format.cr:26:83 # same thing\n```\n\n### Inline disabling\n\nOne or more rules or one or more group of rules can be disabled using inline directives:\n\n```crystal\n# ameba:disable Style/LargeNumbers\ntime = Time.epoch(1483859302)\n\ntime = Time.epoch(1483859302) # ameba:disable Style/LargeNumbers, Lint/UselessAssign\n\ntime = Time.epoch(1483859302) # ameba:disable Style, Lint\n```\n\n## Editors & integrations\n\n * Vim: [vim-crystal](https://github.com/rhysd/vim-crystal), [Ale](https://github.com/w0rp/ale)\n * Emacs: [ameba.el](https://github.com/crystal-ameba/ameba.el)\n * Sublime Text: [Sublime Linter Ameba](https://github.com/epergo/SublimeLinter-contrib-ameba)\n * VSCode: [vscode-crystal-ameba](https://github.com/crystal-ameba/vscode-crystal-ameba)\n * Codacy: [codacy-ameba](https://github.com/codacy/codacy-ameba)\n * GitHub Actions: [github-action](https://github.com/crystal-ameba/github-action)\n\n## Credits & inspirations\n\n- [Crystal Language](https://crystal-lang.org)\n- [Rubocop](https://rubocop.readthedocs.io/en/latest/)\n- [Credo](http://credo-ci.org/)\n- [Dogma](https://github.com/lpil/dogma)\n\n## Contributors\n\n- [veelenga](https://github.com/veelenga) Vitalii Elenhaupt - 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","abstract":false,"args":[{"name":"source","doc":null,"default_value":"","external_name":"source","restriction":"Source"}],"args_string":"(source : Source)","args_html":"(source : Source)","location":{"filename":"src/ameba/formatter/dot_formatter.cr","line_number":21,"url":"https://github.com/crystal-ameba/ameba/blob/7c586eb9/src/ameba/formatter/dot_formatter.cr#L21"},"def":{"name":"source_finished","args":[{"name":"source","doc":null,"default_value":"","external_name":"source","restriction":"Source"}],"double_splat":null,"splat_index":null,"yields":null,"block_arg":null,"return_type":"","visibility":"Public","body":"sym = source.valid? ? \".\".colorize(:green) : \"F\".colorize(:red)\n@mutex.synchronize do\n output << sym\nend\n"}},{"id":"started(sources)-instance-method","html_id":"started(sources)-instance-method","name":"started","doc":"Reports a message when inspection is started.","summary":"Reports a message when inspection is started.
","abstract":false,"args":[{"name":"sources","doc":null,"default_value":"","external_name":"sources","restriction":""}],"args_string":"(sources)","args_html":"(sources)","location":{"filename":"src/ameba/formatter/dot_formatter.cr","line_number":13,"url":"https://github.com/crystal-ameba/ameba/blob/7c586eb9/src/ameba/formatter/dot_formatter.cr#L13"},"def":{"name":"started","args":[{"name":"sources","doc":null,"default_value":"","external_name":"sources","restriction":""}],"double_splat":null,"splat_index":null,"yields":null,"block_arg":null,"return_type":"","visibility":"Public","body":"@started_at = Time.monotonic\noutput.puts(started_message(sources.size))\noutput.puts\n"}}],"macros":[],"types":[]},{"html_id":"ameba/Ameba/Formatter/ExplainFormatter","path":"Ameba/Formatter/ExplainFormatter.html","kind":"class","full_name":"Ameba::Formatter::ExplainFormatter","name":"ExplainFormatter","abstract":false,"superclass":{"html_id":"ameba/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"ameba/Ameba/Formatter/Util","kind":"module","full_name":"Ameba::Formatter::Util","name":"Util"},{"html_id":"ameba/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"ameba/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/ameba/formatter/explain_formatter.cr","line_number":6,"url":"https://github.com/crystal-ameba/ameba/blob/7c586eb9/src/ameba/formatter/explain_formatter.cr#L6"}],"repository_name":"ameba","program":false,"enum":false,"alias":false,"aliased":null,"aliased_html":null,"const":false,"constants":[{"id":"HEADING","name":"HEADING","value":"\"## \"","doc":null,"summary":null},{"id":"PREFIX","name":"PREFIX","value":"\" \"","doc":null,"summary":null}],"included_modules":[{"html_id":"ameba/Ameba/Formatter/Util","kind":"module","full_name":"Ameba::Formatter::Util","name":"Util"}],"extended_modules":[],"subclasses":[],"including_types":[],"namespace":{"html_id":"ameba/Ameba/Formatter","kind":"module","full_name":"Ameba::Formatter","name":"Formatter"},"doc":"A formatter that shows the detailed explanation of the issue at\na specific location.","summary":"A formatter that shows the detailed explanation of the issue at a specific location.
","class_methods":[],"constructors":[{"id":"new(output,location)-class-method","html_id":"new(output,location)-class-method","name":"new","doc":"Creates a new instance of ExplainFormatter.\nAccepts *output* which indicates the io where the explanation will be wrtitten to.\nSecond argument is *location* which indicates the location to explain.\n\n```\nExplainFormatter.new output,\n {file: path, line: line_number, column: column_number}\n```","summary":"Creates a new instance of ExplainFormatter.
","abstract":false,"args":[{"name":"output","doc":null,"default_value":"","external_name":"output","restriction":""},{"name":"location","doc":null,"default_value":"","external_name":"location","restriction":""}],"args_string":"(output, location)","args_html":"(output, location)","location":{"filename":"src/ameba/formatter/explain_formatter.cr","line_number":23,"url":"https://github.com/crystal-ameba/ameba/blob/7c586eb9/src/ameba/formatter/explain_formatter.cr#L23"},"def":{"name":"new","args":[{"name":"output","doc":null,"default_value":"","external_name":"output","restriction":""},{"name":"location","doc":null,"default_value":"","external_name":"location","restriction":""}],"double_splat":null,"splat_index":null,"yields":null,"block_arg":null,"return_type":"","visibility":"Public","body":"_ = allocate\n_.initialize(output, location)\nif _.responds_to?(:finalize)\n ::GC.add_finalizer(_)\nend\n_\n"}}],"instance_methods":[{"id":"finished(sources)-instance-method","html_id":"finished(sources)-instance-method","name":"finished","doc":"Reports the explainations at the *@location*.","summary":"Reports the explainations at the @location.
","abstract":false,"args":[{"name":"sources","doc":null,"default_value":"","external_name":"sources","restriction":""}],"args_string":"(sources)","args_html":"(sources)","location":{"filename":"src/ameba/formatter/explain_formatter.cr","line_number":28,"url":"https://github.com/crystal-ameba/ameba/blob/7c586eb9/src/ameba/formatter/explain_formatter.cr#L28"},"def":{"name":"finished","args":[{"name":"sources","doc":null,"default_value":"","external_name":"sources","restriction":""}],"double_splat":null,"splat_index":null,"yields":null,"block_arg":null,"return_type":"","visibility":"Public","body":"source = sources.find do |__arg0|\n __arg0.path == @location.filename\nend\nif source\nelse\n return\nend\nissue = source.issues.find do |__arg1|\n __arg1.location == @location\nend\nif issue\nelse\n return\nend\nexplain(source, issue)\n"}},{"id":"location:Crystal::Location-instance-method","html_id":"location:Crystal::Location-instance-method","name":"location","doc":null,"summary":null,"abstract":false,"args":[],"args_string":" : Crystal::Location","args_html":" : Crystal::Location","location":{"filename":"src/ameba/formatter/explain_formatter.cr","line_number":13,"url":"https://github.com/crystal-ameba/ameba/blob/7c586eb9/src/ameba/formatter/explain_formatter.cr#L13"},"def":{"name":"location","args":[],"double_splat":null,"splat_index":null,"yields":null,"block_arg":null,"return_type":"Crystal::Location","visibility":"Public","body":"@location"}},{"id":"output:IO::FileDescriptor|IO::Memory-instance-method","html_id":"output:IO::FileDescriptor|IO::Memory-instance-method","name":"output","doc":null,"summary":null,"abstract":false,"args":[],"args_string":" : IO::FileDescriptor | IO::Memory","args_html":" : IO::FileDescriptor | IO::Memory","location":{"filename":"src/ameba/formatter/explain_formatter.cr","line_number":12,"url":"https://github.com/crystal-ameba/ameba/blob/7c586eb9/src/ameba/formatter/explain_formatter.cr#L12"},"def":{"name":"output","args":[],"double_splat":null,"splat_index":null,"yields":null,"block_arg":null,"return_type":"IO::FileDescriptor | IO::Memory","visibility":"Public","body":"@output"}}],"macros":[],"types":[]},{"html_id":"ameba/Ameba/Formatter/FlycheckFormatter","path":"Ameba/Formatter/FlycheckFormatter.html","kind":"class","full_name":"Ameba::Formatter::FlycheckFormatter","name":"FlycheckFormatter","abstract":false,"superclass":{"html_id":"ameba/Ameba/Formatter/BaseFormatter","kind":"class","full_name":"Ameba::Formatter::BaseFormatter","name":"BaseFormatter"},"ancestors":[{"html_id":"ameba/Ameba/Formatter/BaseFormatter","kind":"class","full_name":"Ameba::Formatter::BaseFormatter","name":"BaseFormatter"},{"html_id":"ameba/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"ameba/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/ameba/formatter/flycheck_formatter.cr","line_number":2,"url":"https://github.com/crystal-ameba/ameba/blob/7c586eb9/src/ameba/formatter/flycheck_formatter.cr#L2"}],"repository_name":"ameba","program":false,"enum":false,"alias":false,"aliased":null,"aliased_html":null,"const":false,"constants":[],"included_modules":[],"extended_modules":[],"subclasses":[],"including_types":[],"namespace":{"html_id":"ameba/Ameba/Formatter","kind":"module","full_name":"Ameba::Formatter","name":"Formatter"},"doc":null,"summary":null,"class_methods":[],"constructors":[],"instance_methods":[{"id":"source_finished(source:Source)-instance-method","html_id":"source_finished(source:Source)-instance-method","name":"source_finished","doc":"Callback that indicates when source inspection is finished.\nA corresponding source is passed as an argument.","summary":"Callback that indicates when source inspection is finished.
","abstract":false,"args":[{"name":"source","doc":null,"default_value":"","external_name":"source","restriction":"Source"}],"args_string":"(source : Source)","args_html":"(source : Source)","location":{"filename":"src/ameba/formatter/flycheck_formatter.cr","line_number":5,"url":"https://github.com/crystal-ameba/ameba/blob/7c586eb9/src/ameba/formatter/flycheck_formatter.cr#L5"},"def":{"name":"source_finished","args":[{"name":"source","doc":null,"default_value":"","external_name":"source","restriction":"Source"}],"double_splat":null,"splat_index":null,"yields":null,"block_arg":null,"return_type":"","visibility":"Public","body":"source.issues.each do |e|\n if e.disabled?\n next\n end\n if loc = e.location\n @mutex.synchronize do\n output.printf(\"%s:%d:%d: %s: [%s] %s\\n\", source.path, loc.line_number, loc.column_number, e.rule.severity.symbol, e.rule.name, e.message.gsub('\\n', \" \"))\n end\n end\nend"}}],"macros":[],"types":[]},{"html_id":"ameba/Ameba/Formatter/JSONFormatter","path":"Ameba/Formatter/JSONFormatter.html","kind":"class","full_name":"Ameba::Formatter::JSONFormatter","name":"JSONFormatter","abstract":false,"superclass":{"html_id":"ameba/Ameba/Formatter/BaseFormatter","kind":"class","full_name":"Ameba::Formatter::BaseFormatter","name":"BaseFormatter"},"ancestors":[{"html_id":"ameba/Ameba/Formatter/BaseFormatter","kind":"class","full_name":"Ameba::Formatter::BaseFormatter","name":"BaseFormatter"},{"html_id":"ameba/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"ameba/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/ameba/formatter/json_formatter.cr","line_number":66,"url":"https://github.com/crystal-ameba/ameba/blob/7c586eb9/src/ameba/formatter/json_formatter.cr#L66"}],"repository_name":"ameba","program":false,"enum":false,"alias":false,"aliased":null,"aliased_html":null,"const":false,"constants":[],"included_modules":[],"extended_modules":[],"subclasses":[],"including_types":[],"namespace":{"html_id":"ameba/Ameba/Formatter","kind":"module","full_name":"Ameba::Formatter","name":"Formatter"},"doc":"A formatter that produces the result in a json format.\n\nExample:\n\n```\n{\n \"metadata\": {\n \"ameba_version\": \"x.x.x\",\n \"crystal_version\": \"x.x.x\",\n },\n \"sources\": [\n {\n \"issues\": [\n {\n \"location\": {\n \"column\": 7,\n \"line\": 17,\n },\n \"end_location\": {\n \"column\": 20,\n \"line\": 17,\n },\n \"message\": \"Useless assignment to variable `a`\",\n \"rule_name\": \"UselessAssign\",\n \"severity\": \"Convention\",\n },\n {\n \"location\": {\n \"column\": 7,\n \"line\": 18,\n },\n \"end_location\": {\n \"column\": 8,\n \"line\": 18,\n },\n \"message\": \"Useless assignment to variable `a`\",\n \"rule_name\": \"UselessAssign\",\n },\n {\n \"location\": {\n \"column\": 7,\n \"line\": 19,\n },\n \"end_location\": {\n \"column\": 9,\n \"line\": 19,\n },\n \"message\": \"Useless assignment to variable `a`\",\n \"rule_name\": \"UselessAssign\",\n \"severity\": \"Convention\",\n },\n ],\n \"path\": \"src/ameba/formatter/json_formatter.cr\",\n },\n ],\n \"summary\": {\n \"issues_count\": 3,\n \"target_sources_count\": 1,\n },\n}\n```\n","summary":"A formatter that produces the result in a json format.
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\ No newline at end of file
+crystal_doc_search_index_callback({"repository_name":"ameba","body":"\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\n\n- [About](#about)\n- [Usage](#usage)\n * [Watch a tutorial](#watch-a-tutorial)\n * [Run in parallel](#run-in-parallel)\n- [Installation](#installation)\n * [As a project dependency:](#as-a-project-dependency)\n * [OS X](#os-x)\n * [Docker](#docker)\n * [From sources](#from-sources)\n- [Configuration](#configuration)\n * [Sources](#sources)\n * [Rules](#rules)\n * [Explain issues](#explain-issues)\n * [Inline disabling](#inline-disabling)\n- [Editors & integrations](#editors--integrations)\n- [Credits & inspirations](#credits--inspirations)\n- [Contributors](#contributors)\n\n## About\n\nAmeba is a static code analysis tool for the Crystal language.\nIt enforces a consistent [Crystal code style](https://crystal-lang.org/reference/conventions/coding_style.html),\nalso catches code smells and wrong code constructions.\n\nSee also [Roadmap](https://github.com/crystal-ameba/ameba/wiki).\n\n## Usage\n\nRun `ameba` binary within your project directory to catch code issues:\n\n```sh\n$ ameba\nInspecting 107 files\n\n...............F.....................F....................................................................\n\nsrc/ameba/formatter/flycheck_formatter.cr:4:33\n[W] Lint/UnusedArgument: Unused argument `location`\n> source.issues.each do |e, location|\n ^\n\nsrc/ameba/formatter/base_formatter.cr:12:7\n[W] Lint/UselessAssign: Useless assignment to variable `s`\n> return s += issues.size\n ^\n\nFinished in 542.64 milliseconds\n129 inspected, 2 failures\n```\n\n### Watch a tutorial\n\n\n\n[🎬 Watch the LuckyCast showing how to use Ameba](https://luckycasts.com/videos/ameba)\n\n### Run in parallel\n\nStarting from 0.31.0 Crystal [supports parallelism](https://crystal-lang.org/2019/09/06/parallelism-in-crystal.html).\nIt allows to run linting in parallel too.\nIn order to take advantage of this feature you need to build ameba with preview_mt support:\n\n```sh\n$ crystal build src/cli.cr -Dpreview_mt -o bin/ameba\n$ make install\n```\n\nSome quick benchmark results measured while running Ameba on Crystal repo:\n\n```sh\n$ CRYSTAL_WORKERS=1 ameba #=> 29.11 seconds\n$ CRYSTAL_WORKERS=2 ameba #=> 19.49 seconds\n$ CRYSTAL_WORKERS=4 ameba #=> 13.48 seconds\n$ CRYSTAL_WORKERS=8 ameba #=> 10.14 seconds\n```\n\n## Installation\n\n### As a project dependency:\n\nAdd this to your application's `shard.yml`:\n\n```yaml\ndevelopment_dependencies:\n ameba:\n github: crystal-ameba/ameba\n version: ~> 0.13.0\n```\n\nBuild `bin/ameba` binary within your project directory while running `shards install`.\n\nYou may also want to use it on [Travis](travis-ci.org):\n\n```yaml\n# .travis.yml\nlanguage: crystal\ninstall:\n - shards install\nscript:\n - crystal spec\n - crystal bin/ameba.cr\n```\n\nUsing this config Ameba will inspect files just after the specs run. Travis will also fail\nthe build if some problems detected.\n\n### OS X\n\n```sh\n$ brew tap veelenga/tap\n$ brew install ameba\n```\n\n### Docker\n\nBuild the image:\n\n```sh\n$ docker build -t crystal-ameba/ameba .\n```\n\nTo use the resulting image on a local source folder, mount the current (or target) directory into `/src`:\n\n```sh\n$ docker run -v $(pwd):/src crystal-ameba/ameba\n```\n\nAlso available on DockerHub: https://hub.docker.com/r/veelenga/ameba\n\n### From sources\n\n```sh\n$ git clone https://github.com/crystal-ameba/ameba && cd ameba\n$ make install\n```\n\n## Configuration\n\nDefault configuration file is `.ameba.yml`.\nIt allows to configure rule properties, disable specific rules and exclude sources from the rules.\n\nGenerate new file by running `ameba --gen-config`.\n\n### Sources\n\n**List of sources to run Ameba on can be configured globally via:**\n\n- `Globs` section - an array of wildcards (or paths) to include to the\n inspection. Defaults to `%w(**/*.cr !lib)`, meaning it includes all project\n files with `*.cr` extension except those which exist in `lib` folder.\n- `Excluded` section - an array of wildcards (or paths) to exclude from the\n source list defined by `Globs`. Defaults to an empty array.\n\nIn this example we define default globs and exclude `src/compiler` folder:\n\n``` yaml\nGlobs:\n - **/*.cr\n - !lib\n\nExcluded:\n - src/compiler\n```\n\n**Specific sources can be excluded at rule level**:\n\n``` yaml\nStyle/RedundantBegin:\n Excluded:\n - src/server/processor.cr\n - src/server/api.cr\n```\n\n### Rules\n\nOne or more rules, or a one or more group of rules can be included or excluded\nvia command line arguments:\n\n```sh\n$ ameba --only Lint/Syntax # runs only Lint/Syntax rule\n$ ameba --only Style,Lint # runs only rules from Style and Lint groups\n$ ameba --except Lint/Syntax # runs all rules except Lint/Syntax\n$ ameba --except Style,Lint # runs all rules except rules in Style and Lint groups\n```\n\nOr through the configuration file:\n\n``` yaml\nStyle/RedundantBegin:\n Enabled: false\n```\n\n### Explain issues\n\nAmeba allows you to dig deeper into an issue, by showing you details about the issue\nand the reasoning by it being reported.\n\nTo be convenient, you can just copy-paste the `PATH:line:column` string from the\nreport and paste behind the `ameba` command to check it out.\n\n```sh\n$ ameba crystal/command/format.cr:26:83 # show explanation for the issue\n$ ameba --explain crystal/command/format.cr:26:83 # same thing\n```\n\n### Inline disabling\n\nOne or more rules or one or more group of rules can be disabled using inline directives:\n\n```crystal\n# ameba:disable Style/LargeNumbers\ntime = Time.epoch(1483859302)\n\ntime = Time.epoch(1483859302) # ameba:disable Style/LargeNumbers, Lint/UselessAssign\n\ntime = Time.epoch(1483859302) # ameba:disable Style, Lint\n```\n\n## Editors & integrations\n\n * Vim: [vim-crystal](https://github.com/rhysd/vim-crystal), [Ale](https://github.com/w0rp/ale)\n * Emacs: [ameba.el](https://github.com/crystal-ameba/ameba.el)\n * Sublime Text: [Sublime Linter Ameba](https://github.com/epergo/SublimeLinter-contrib-ameba)\n * VSCode: [vscode-crystal-ameba](https://github.com/crystal-ameba/vscode-crystal-ameba)\n * Codacy: [codacy-ameba](https://github.com/codacy/codacy-ameba)\n * GitHub Actions: [github-action](https://github.com/crystal-ameba/github-action)\n\n## Credits & inspirations\n\n- [Crystal Language](https://crystal-lang.org)\n- [Rubocop](https://rubocop.readthedocs.io/en/latest/)\n- [Credo](http://credo-ci.org/)\n- [Dogma](https://github.com/lpil/dogma)\n\n## Contributors\n\n- [veelenga](https://github.com/veelenga) Vitalii Elenhaupt - 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","class_methods":[],"constructors":[],"instance_methods":[{"id":"finished(sources)-instance-method","html_id":"finished(sources)-instance-method","name":"finished","doc":"Reports a message when inspection is finished.","summary":"Reports a message when inspection is finished.
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","abstract":false,"args":[{"name":"sources","doc":null,"default_value":"","external_name":"sources","restriction":""}],"args_string":"(sources)","args_html":"(sources)","location":{"filename":"src/ameba/formatter/dot_formatter.cr","line_number":13,"url":"https://github.com/crystal-ameba/ameba/blob/cd18c6a0/src/ameba/formatter/dot_formatter.cr#L13"},"def":{"name":"started","args":[{"name":"sources","doc":null,"default_value":"","external_name":"sources","restriction":""}],"double_splat":null,"splat_index":null,"yields":null,"block_arg":null,"return_type":"","visibility":"Public","body":"@started_at = Time.monotonic\noutput.puts(started_message(sources.size))\noutput.puts\n"}}],"macros":[],"types":[]},{"html_id":"ameba/Ameba/Formatter/ExplainFormatter","path":"Ameba/Formatter/ExplainFormatter.html","kind":"class","full_name":"Ameba::Formatter::ExplainFormatter","name":"ExplainFormatter","abstract":false,"superclass":{"html_id":"ameba/Reference","kind":"class","full_name":"Reference","name":"Reference"},"ancestors":[{"html_id":"ameba/Ameba/Formatter/Util","kind":"module","full_name":"Ameba::Formatter::Util","name":"Util"},{"html_id":"ameba/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"ameba/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/ameba/formatter/explain_formatter.cr","line_number":6,"url":"https://github.com/crystal-ameba/ameba/blob/cd18c6a0/src/ameba/formatter/explain_formatter.cr#L6"}],"repository_name":"ameba","program":false,"enum":false,"alias":false,"aliased":null,"aliased_html":null,"const":false,"constants":[{"id":"HEADING","name":"HEADING","value":"\"## \"","doc":null,"summary":null},{"id":"PREFIX","name":"PREFIX","value":"\" \"","doc":null,"summary":null}],"included_modules":[{"html_id":"ameba/Ameba/Formatter/Util","kind":"module","full_name":"Ameba::Formatter::Util","name":"Util"}],"extended_modules":[],"subclasses":[],"including_types":[],"namespace":{"html_id":"ameba/Ameba/Formatter","kind":"module","full_name":"Ameba::Formatter","name":"Formatter"},"doc":"A formatter that shows the detailed explanation of the issue at\na specific location.","summary":"A formatter that shows the detailed explanation of the issue at a specific location.
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","abstract":false,"args":[{"name":"output","doc":null,"default_value":"","external_name":"output","restriction":""},{"name":"location","doc":null,"default_value":"","external_name":"location","restriction":""}],"args_string":"(output, location)","args_html":"(output, location)","location":{"filename":"src/ameba/formatter/explain_formatter.cr","line_number":23,"url":"https://github.com/crystal-ameba/ameba/blob/cd18c6a0/src/ameba/formatter/explain_formatter.cr#L23"},"def":{"name":"new","args":[{"name":"output","doc":null,"default_value":"","external_name":"output","restriction":""},{"name":"location","doc":null,"default_value":"","external_name":"location","restriction":""}],"double_splat":null,"splat_index":null,"yields":null,"block_arg":null,"return_type":"","visibility":"Public","body":"_ = allocate\n_.initialize(output, location)\nif _.responds_to?(:finalize)\n ::GC.add_finalizer(_)\nend\n_\n"}}],"instance_methods":[{"id":"finished(sources)-instance-method","html_id":"finished(sources)-instance-method","name":"finished","doc":"Reports the explainations at the *@location*.","summary":"Reports the explainations at the @location.
","abstract":false,"args":[{"name":"sources","doc":null,"default_value":"","external_name":"sources","restriction":""}],"args_string":"(sources)","args_html":"(sources)","location":{"filename":"src/ameba/formatter/explain_formatter.cr","line_number":28,"url":"https://github.com/crystal-ameba/ameba/blob/cd18c6a0/src/ameba/formatter/explain_formatter.cr#L28"},"def":{"name":"finished","args":[{"name":"sources","doc":null,"default_value":"","external_name":"sources","restriction":""}],"double_splat":null,"splat_index":null,"yields":null,"block_arg":null,"return_type":"","visibility":"Public","body":"source = sources.find do |__arg0|\n __arg0.path == @location.filename\nend\nif source\nelse\n return\nend\nissue = source.issues.find do |__arg1|\n __arg1.location == @location\nend\nif issue\nelse\n return\nend\nexplain(source, issue)\n"}},{"id":"location:Crystal::Location-instance-method","html_id":"location:Crystal::Location-instance-method","name":"location","doc":null,"summary":null,"abstract":false,"args":[],"args_string":" : Crystal::Location","args_html":" : Crystal::Location","location":{"filename":"src/ameba/formatter/explain_formatter.cr","line_number":13,"url":"https://github.com/crystal-ameba/ameba/blob/cd18c6a0/src/ameba/formatter/explain_formatter.cr#L13"},"def":{"name":"location","args":[],"double_splat":null,"splat_index":null,"yields":null,"block_arg":null,"return_type":"Crystal::Location","visibility":"Public","body":"@location"}},{"id":"output:IO::FileDescriptor|IO::Memory-instance-method","html_id":"output:IO::FileDescriptor|IO::Memory-instance-method","name":"output","doc":null,"summary":null,"abstract":false,"args":[],"args_string":" : IO::FileDescriptor | IO::Memory","args_html":" : IO::FileDescriptor | IO::Memory","location":{"filename":"src/ameba/formatter/explain_formatter.cr","line_number":12,"url":"https://github.com/crystal-ameba/ameba/blob/cd18c6a0/src/ameba/formatter/explain_formatter.cr#L12"},"def":{"name":"output","args":[],"double_splat":null,"splat_index":null,"yields":null,"block_arg":null,"return_type":"IO::FileDescriptor | IO::Memory","visibility":"Public","body":"@output"}}],"macros":[],"types":[]},{"html_id":"ameba/Ameba/Formatter/FlycheckFormatter","path":"Ameba/Formatter/FlycheckFormatter.html","kind":"class","full_name":"Ameba::Formatter::FlycheckFormatter","name":"FlycheckFormatter","abstract":false,"superclass":{"html_id":"ameba/Ameba/Formatter/BaseFormatter","kind":"class","full_name":"Ameba::Formatter::BaseFormatter","name":"BaseFormatter"},"ancestors":[{"html_id":"ameba/Ameba/Formatter/BaseFormatter","kind":"class","full_name":"Ameba::Formatter::BaseFormatter","name":"BaseFormatter"},{"html_id":"ameba/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"ameba/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/ameba/formatter/flycheck_formatter.cr","line_number":2,"url":"https://github.com/crystal-ameba/ameba/blob/cd18c6a0/src/ameba/formatter/flycheck_formatter.cr#L2"}],"repository_name":"ameba","program":false,"enum":false,"alias":false,"aliased":null,"aliased_html":null,"const":false,"constants":[],"included_modules":[],"extended_modules":[],"subclasses":[],"including_types":[],"namespace":{"html_id":"ameba/Ameba/Formatter","kind":"module","full_name":"Ameba::Formatter","name":"Formatter"},"doc":null,"summary":null,"class_methods":[],"constructors":[],"instance_methods":[{"id":"source_finished(source:Source)-instance-method","html_id":"source_finished(source:Source)-instance-method","name":"source_finished","doc":"Callback that indicates when source inspection is finished.\nA corresponding source is passed as an argument.","summary":"Callback that indicates when source inspection is finished.
","abstract":false,"args":[{"name":"source","doc":null,"default_value":"","external_name":"source","restriction":"Source"}],"args_string":"(source : Source)","args_html":"(source : Source)","location":{"filename":"src/ameba/formatter/flycheck_formatter.cr","line_number":5,"url":"https://github.com/crystal-ameba/ameba/blob/cd18c6a0/src/ameba/formatter/flycheck_formatter.cr#L5"},"def":{"name":"source_finished","args":[{"name":"source","doc":null,"default_value":"","external_name":"source","restriction":"Source"}],"double_splat":null,"splat_index":null,"yields":null,"block_arg":null,"return_type":"","visibility":"Public","body":"source.issues.each do |e|\n if e.disabled?\n next\n end\n if loc = e.location\n @mutex.synchronize do\n output.printf(\"%s:%d:%d: %s: [%s] %s\\n\", source.path, loc.line_number, loc.column_number, e.rule.severity.symbol, e.rule.name, e.message.gsub('\\n', \" \"))\n end\n end\nend"}}],"macros":[],"types":[]},{"html_id":"ameba/Ameba/Formatter/JSONFormatter","path":"Ameba/Formatter/JSONFormatter.html","kind":"class","full_name":"Ameba::Formatter::JSONFormatter","name":"JSONFormatter","abstract":false,"superclass":{"html_id":"ameba/Ameba/Formatter/BaseFormatter","kind":"class","full_name":"Ameba::Formatter::BaseFormatter","name":"BaseFormatter"},"ancestors":[{"html_id":"ameba/Ameba/Formatter/BaseFormatter","kind":"class","full_name":"Ameba::Formatter::BaseFormatter","name":"BaseFormatter"},{"html_id":"ameba/Reference","kind":"class","full_name":"Reference","name":"Reference"},{"html_id":"ameba/Object","kind":"class","full_name":"Object","name":"Object"}],"locations":[{"filename":"src/ameba/formatter/json_formatter.cr","line_number":66,"url":"https://github.com/crystal-ameba/ameba/blob/cd18c6a0/src/ameba/formatter/json_formatter.cr#L66"}],"repository_name":"ameba","program":false,"enum":false,"alias":false,"aliased":null,"aliased_html":null,"const":false,"constants":[],"included_modules":[],"extended_modules":[],"subclasses":[],"including_types":[],"namespace":{"html_id":"ameba/Ameba/Formatter","kind":"module","full_name":"Ameba::Formatter","name":"Formatter"},"doc":"A formatter that produces the result in a json format.\n\nExample:\n\n```\n{\n \"metadata\": {\n \"ameba_version\": \"x.x.x\",\n \"crystal_version\": \"x.x.x\",\n },\n \"sources\": [\n {\n \"issues\": [\n {\n \"location\": {\n \"column\": 7,\n \"line\": 17,\n },\n \"end_location\": {\n \"column\": 20,\n \"line\": 17,\n },\n \"message\": \"Useless assignment to variable `a`\",\n \"rule_name\": \"UselessAssign\",\n \"severity\": \"Convention\",\n },\n {\n \"location\": {\n \"column\": 7,\n \"line\": 18,\n },\n \"end_location\": {\n \"column\": 8,\n \"line\": 18,\n },\n \"message\": \"Useless assignment to variable `a`\",\n \"rule_name\": \"UselessAssign\",\n },\n {\n \"location\": {\n \"column\": 7,\n \"line\": 19,\n },\n \"end_location\": {\n \"column\": 9,\n \"line\": 19,\n },\n \"message\": \"Useless assignment to variable `a`\",\n \"rule_name\": \"UselessAssign\",\n \"severity\": \"Convention\",\n },\n ],\n \"path\": \"src/ameba/formatter/json_formatter.cr\",\n },\n ],\n \"summary\": {\n \"issues_count\": 3,\n \"target_sources_count\": 1,\n },\n}\n```\n","summary":"A formatter that produces the result in a json format.
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2 }\n[1, 2, 3].count(&.< 2)\n[0, 1, 2].count(&.zero?)\n[0, 1, 2].count(&.!= 0)\n```\n\nYAML configuration example:\n\n```\nPerformance/SizeAfterFilter:\n Enabled: true\n FilterNames:\n - select\n - reject\n```","summary":"This rule is used to identify usage of size calls that follow filter.
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Crystal::Assign)","location":{"filename":"src/ameba/rule/style/constant_names.cr","line_number":31,"url":"https://github.com/crystal-ameba/ameba/blob/cd18c6a0/src/ameba/rule/style/constant_names.cr#L31"},"def":{"name":"test","args":[{"name":"source","doc":null,"default_value":"","external_name":"source","restriction":""},{"name":"node","doc":null,"default_value":"","external_name":"node","restriction":"Crystal::Assign"}],"double_splat":null,"splat_index":null,"yields":null,"block_arg":null,"return_type":"","visibility":"Public","body":"if (target = node.target).is_a?(Crystal::Path)\n name = target.names.first\n expected = name.upcase\n if name.in?(expected, name.camelcase)\n return\n end\n issue_for(target, MSG % {expected, 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\ No newline at end of file