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Ameba/Rule/Performance/AnyInsteadOfEmpty.html
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@ -451,6 +451,11 @@
</li>
<li class=" " data-id="ameba/Ameba/Rule/Performance/Base" data-name="ameba::rule::performance::base">
<a href="../../../Ameba/Rule/Performance/Base.html">Base</a>
</li>
<li class=" " data-id="ameba/Ameba/Rule/Performance/ChainedCallWithNoBang" data-name="ameba::rule::performance::chainedcallwithnobang">
<a href="../../../Ameba/Rule/Performance/ChainedCallWithNoBang.html">ChainedCallWithNoBang</a>
@ -620,7 +625,7 @@
</h1>
<ul class="superclass-hierarchy"><li class="superclass"><a href="../../../Ameba/Rule/Performance/AnyInsteadOfEmpty.html">Ameba::Rule::Performance::AnyInsteadOfEmpty</a></li><li class="superclass"><a href="../../../Ameba/Rule/Base.html">Ameba::Rule::Base</a></li><li class="superclass">Reference</li><li class="superclass">Object</li></ul>
<ul class="superclass-hierarchy"><li class="superclass"><a href="../../../Ameba/Rule/Performance/AnyInsteadOfEmpty.html">Ameba::Rule::Performance::AnyInsteadOfEmpty</a></li><li class="superclass"><a href="../../../Ameba/Rule/Performance/Base.html">Ameba::Rule::Performance::Base</a></li><li class="superclass"><a href="../../../Ameba/Rule/Base.html">Ameba::Rule::Base</a></li><li class="superclass">Reference</li><li class="superclass">Object</li></ul>
@ -694,7 +699,7 @@ one value present.</p>
</h2>
<a href="https://github.com/crystal-ameba/ameba/blob/7c586eb9/src/ameba/rule/performance/any_instead_of_empty.cr#L28" target="_blank">
<a href="https://github.com/crystal-ameba/ameba/blob/cd18c6a0/src/ameba/rule/performance/any_instead_of_empty.cr#L30" target="_blank">
ameba/rule/performance/any_instead_of_empty.cr
</a>
@ -742,6 +747,8 @@ one value present.</p>
<li class="entry-summary">
<a href="#new(ctx:YAML::ParseContext,node:YAML::Nodes::Node)-class-method" class="signature"><strong>.new</strong>(ctx : YAML::ParseContext, node : YAML::Nodes::Node)</a>
<div class="summary"><p>This rule is used to identify usage of arg-less <code>Enumerable#any?</code> calls.</p></div>
</li>
<li class="entry-summary">
@ -832,6 +839,54 @@ one value present.</p>
<h3>Instance methods inherited from class <code><a href="../../../Ameba/Rule/Performance/Base.html">Ameba::Rule::Performance::Base</a></code></h3>
<a href="../../../Ameba/Rule/Performance/Base.html#catch(source:Source)-instance-method" class="tooltip">
<span>catch(source : Source)</span>
catch</a>
<h3>Constructor methods inherited from class <code><a href="../../../Ameba/Rule/Performance/Base.html">Ameba::Rule::Performance::Base</a></code></h3>
<a href="../../../Ameba/Rule/Performance/Base.html#new(ctx:YAML::ParseContext,node:YAML::Nodes::Node)-class-method" class="tooltip">
<span>new(ctx : YAML::ParseContext, node : YAML::Nodes::Node)<br/>new(config = <span class="n">nil</span>)</span>
new</a>
@ -953,6 +1008,30 @@ one value present.</p>
<a class="method-permalink" href="#new(ctx:YAML::ParseContext,node:YAML::Nodes::Node)-class-method">#</a>
</div>
<div class="doc">
<p>This rule is used to identify usage of arg-less <code>Enumerable#any?</code> calls.</p>
<p>Using <code>Enumerable#any?</code> instead of <code>Enumerable#empty?</code> might lead to an
unexpected results (like <code>[nil, false].any? # => false</code>). In some cases
it also might be less efficient, since it iterates until the block will
return a <em>truthy</em> value, instead of just checking if there's at least
one value present.</p>
<p>For example, this is considered invalid:</p>
<pre><code class="language-crystal">[<span class="n">1</span>, <span class="n">2</span>, <span class="n">3</span>].any?</code></pre>
<p>And it should be written as this:</p>
<pre><code class="language-crystal"><span class="o">!</span>[<span class="n">1</span>, <span class="n">2</span>, <span class="n">3</span>].empty?</code></pre>
<p>YAML configuration example:</p>
<pre><code class="language-crystal">Performance/AnyInsteadOfEmpty:
Enabled: true</code></pre>
</div>
<br/>
<div>
@ -994,7 +1073,7 @@ one value present.</p>
<br/>
<div>
[<a href="https://github.com/crystal-ameba/ameba/blob/7c586eb9/src/ameba/rule/performance/any_instead_of_empty.cr#L28" target="_blank">View source</a>]
[<a href="https://github.com/crystal-ameba/ameba/blob/cd18c6a0/src/ameba/rule/performance/any_instead_of_empty.cr#L30" target="_blank">View source</a>]
</div>
</div>
@ -1136,7 +1215,7 @@ one value present.</p>
<br/>
<div>
[<a href="https://github.com/crystal-ameba/ameba/blob/7c586eb9/src/ameba/rule/performance/any_instead_of_empty.cr#L36" target="_blank">View source</a>]
[<a href="https://github.com/crystal-ameba/ameba/blob/cd18c6a0/src/ameba/rule/performance/any_instead_of_empty.cr#L38" target="_blank">View source</a>]
</div>
</div>