doc/api/classes/ActiveSupport/CoreExtensions/Time/Calculations/ClassMethods.html
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<title>Module: ActiveSupport::CoreExtensions::Time::Calculations::ClassMethods</title>
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<td><strong>Module</strong></td>
<td class="class-name-in-header">ActiveSupport::CoreExtensions::Time::Calculations::ClassMethods</td>
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<a href="../../../../../files/vendor/rails/activesupport/lib/active_support/core_ext/time/calculations_rb.html">
vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb
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<h3 class="section-bar">Methods</h3>
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<a href="#M000361">days_in_month</a>
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<h3 class="section-bar">Public Instance methods</h3>
<div id="method-M000361" class="method-detail">
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<span class="method-name">days_in_month</span><span class="method-args">(month, year=nil)</span>
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<p>
Return the number of days in the given month. If a year is given, February
will return the correct number of days for leap years. Otherwise, this
method will always report February as having 28 days.
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<pre>
<span class="ruby-comment cmt"># File vendor/rails/activesupport/lib/active_support/core_ext/time/calculations.rb, line 15</span>
15: <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">days_in_month</span>(<span class="ruby-identifier">month</span>, <span class="ruby-identifier">year</span>=<span class="ruby-keyword kw">nil</span>)
16: <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">month</span> <span class="ruby-operator">==</span> <span class="ruby-value">2</span>
17: <span class="ruby-operator">!</span><span class="ruby-identifier">year</span>.<span class="ruby-identifier">nil?</span> <span class="ruby-operator">&&</span> (<span class="ruby-identifier">year</span> <span class="ruby-operator">%</span> <span class="ruby-value">4</span> <span class="ruby-operator">==</span> <span class="ruby-value">0</span>) <span class="ruby-operator">&&</span> ((<span class="ruby-identifier">year</span> <span class="ruby-operator">%</span> <span class="ruby-value">100</span> <span class="ruby-operator">!=</span> <span class="ruby-value">0</span>) <span class="ruby-operator">||</span> (<span class="ruby-identifier">year</span> <span class="ruby-operator">%</span> <span class="ruby-value">400</span> <span class="ruby-operator">==</span> <span class="ruby-value">0</span>)) <span class="ruby-operator">?</span> <span class="ruby-value">29</span> <span class="ruby-operator">:</span> <span class="ruby-value">28</span>
18: <span class="ruby-keyword kw">elsif</span> <span class="ruby-identifier">month</span> <span class="ruby-operator"><=</span> <span class="ruby-value">7</span>
19: <span class="ruby-identifier">month</span> <span class="ruby-operator">%</span> <span class="ruby-value">2</span> <span class="ruby-operator">==</span> <span class="ruby-value">0</span> <span class="ruby-operator">?</span> <span class="ruby-value">30</span> <span class="ruby-operator">:</span> <span class="ruby-value">31</span>
20: <span class="ruby-keyword kw">else</span>
21: <span class="ruby-identifier">month</span> <span class="ruby-operator">%</span> <span class="ruby-value">2</span> <span class="ruby-operator">==</span> <span class="ruby-value">0</span> <span class="ruby-operator">?</span> <span class="ruby-value">31</span> <span class="ruby-operator">:</span> <span class="ruby-value">30</span>
22: <span class="ruby-keyword kw">end</span>
23: <span class="ruby-keyword kw">end</span>
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