+

+ + class Ameba::Rule::Performance::MinMaxAfterMap + +

+ + + + + + + +

+ + + + Overview +

+ +

This rule is used to identify usage of min/max/minmax calls that follow map.

+

For example, this is considered invalid:

+
%w[Alice Bob].map(&.size).min
+%w[Alice Bob].map(&.size).max
+%w[Alice Bob].map(&.size).minmax
+

And it should be written as this:

+
%w[Alice Bob].min_of(&.size)
+%w[Alice Bob].max_of(&.size)
+%w[Alice Bob].minmax_of(&.size)
+

YAML configuration example:

+
Performance/MinMaxAfterMap:
+  Enabled: true
+ + + + + +

+ + + + Included Modules +

+
    + +
  • YAML::Serializable
    • + +
  • YAML::Serializable::Strict
    • + +
+ + + + + + + + + + +

+ + + + Defined in: +

+ + + + ameba/rule/performance/minmax_after_map.cr + + +
+ + + + + +

+ + + + Constant Summary +

+ +
+ +
+ CALL_NAMES = ["min", "min?", "max", "max?", "minmax", "minmax?"] of ::String +
+ + +
+ MSG = "Use `%s {...}` instead of `map {...}.%s`." +
+ + +
+ + + +

+ + + + Constructors +

+ + + + +

+ + + + Class Method Summary +

+ + + + +

+ + + + Instance Method Summary +

+ + + + + + +
+ + + + + + + + + + + + + + + + + + + + + + + +

Instance methods inherited from class Ameba::Rule::Performance::Base

+ + + + catch(source : Source) + catch + + + + + + +

Constructor methods inherited from class Ameba::Rule::Performance::Base

+ + + + new(ctx : YAML::ParseContext, node : YAML::Nodes::Node)
new(config = nil) + new + + + + + + +

Class methods inherited from class Ameba::Rule::Performance::Base

+ + + + parsed_doc : String | Nil + parsed_doc + + + + + + + + + + + + + + + + + + + + + + + + + + + +

Instance methods inherited from class Ameba::Rule::Base

+ + + + ==(other) + ==, + + + + catch(source : Source) + catch, + + + + excluded?(source) + excluded?, + + + + group + group, + + + + hash + hash, + + + + name + name, + + + + special? + special?, + + + + test(source : Source, node : Crystal::ASTNode, *opts)
test(source : Source) + test + + + + + + + + + +

Class methods inherited from class Ameba::Rule::Base

+ + + + default_severity : Ameba::Severity + default_severity + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
+ + +

+ + + + Constructor Detail +

+ +
+
+ + def self.new(ctx : YAML::ParseContext, node : YAML::Nodes::Node) + + # +
+ +
+ +

This rule is used to identify usage of min/max/minmax calls that follow map.

+

For example, this is considered invalid:

+
%w[Alice Bob].map(&.size).min
+%w[Alice Bob].map(&.size).max
+%w[Alice Bob].map(&.size).minmax
+

And it should be written as this:

+
%w[Alice Bob].min_of(&.size)
+%w[Alice Bob].max_of(&.size)
+%w[Alice Bob].minmax_of(&.size)
+

YAML configuration example:

+
Performance/MinMaxAfterMap:
+  Enabled: true
+
+ +
+
+ +
+
+ +
+
+ + def self.new(config = nil) + + # +
+ +
+ +

This rule is used to identify usage of min/max/minmax calls that follow map.

+

For example, this is considered invalid:

+
%w[Alice Bob].map(&.size).min
+%w[Alice Bob].map(&.size).max
+%w[Alice Bob].map(&.size).minmax
+

And it should be written as this:

+
%w[Alice Bob].min_of(&.size)
+%w[Alice Bob].max_of(&.size)
+%w[Alice Bob].minmax_of(&.size)
+

YAML configuration example:

+
Performance/MinMaxAfterMap:
+  Enabled: true
+
+ +
+
+ + [View source] + +
+
+ + + + +

+ + + + Class Method Detail +

+ +
+
+ + def self.parsed_doc : String | Nil + + # +
+ +
+ +

Returns documentation for this rule, if there is any.

+
module Ameba
+  # This is a test rule.
+  # Does nothing.
+  class MyRule < Ameba::Rule::Base
+    def test(source)
+    end
+  end
+end
+
+MyRule.parsed_doc # => "This is a test rule.\nDoes nothing."
+
+ +
+
+ +
+
+ + + + +

+ + + + Instance Method Detail +

+ +
+
+ + def description : String + + # +
+ +
+
+ +
+
+ +
+
+ + def description=(description : String) + + # +
+ +
+
+ +
+
+ +
+
+ + def enabled=(enabled : Bool) + + # +
+ +
+
+ +
+
+ +
+
+ + def enabled? : Bool + + # +
+ +
+
+ +
+
+ +
+
+ + def excluded : Array(String) | Nil + + # +
+ +
+
+ +
+
+ +
+
+ + def excluded=(excluded : Array(String) | Nil) + + # +
+ +
+
+ +
+
+ +
+
+ + def severity : Ameba::Severity + + # +
+ +
+
+ +
+
+ +
+
+ + def severity=(severity : Ameba::Severity) + + # +
+ +
+
+ +
+
+ +
+
+ + def test(source, node : Crystal::Call) + + # +
+ +
+
+ + [View source] + +
+
+ +
+
+ + def test(source) + + # +
+ +
+
+ + [View source] + +
+
+ + + + + +