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    <p>First make sure you're using the correct operator: <code>=~</code> is correct, <code>~=</code> is not.</p> <p>The operator <code>=~</code> returns the index of the first match (<code>nil</code> if no match) and stores the <code>MatchData</code> in the global variable <code>$~</code>. Named capture groups are assigned to a hash on <code>$~</code>, and, when the <code>RegExp</code> is a literal on the left side of the operator, are also assigned to local variables with those names.</p> <pre><code>&gt;&gt; str = "Here is a string" &gt;&gt; re = /(?&lt;vowel&gt;[aeiou])/ # Contains capture group named "vowel" &gt;&gt; str =~ re =&gt; 1 &gt;&gt; $~ =&gt; #&lt;MatchData "e" vowel:"e"&gt; &gt;&gt; $~[:vowel] # Accessible using symbol... =&gt; "e" &gt;&gt; $~["vowel"] # ...or string =&gt; "e" &gt;&gt; /(?&lt;s_word&gt;\ss\w*)/ =~ str =&gt; 9 &gt;&gt; s_word # This was assigned to a local variable =&gt; " string" </code></pre> <p>The method <code>match</code> returns the <code>MatchData</code> itself (again, <code>nil</code> if no match). Named capture groups in this case, on either side of the method call, are assigned to a hash on the returned <code>MatchData</code>.</p> <pre><code>&gt;&gt; m = str.match re =&gt; #&lt;MatchData "e" vowel:"e"&gt; &gt;&gt; m[:vowel] =&gt; "e" </code></pre> <p>See <a href="http://www.ruby-doc.org/core-1.9.3/Regexp.html" rel="noreferrer">http://www.ruby-doc.org/core-1.9.3/Regexp.html</a> (as well as the sections on <code>MatchData</code> and <code>String</code>) for more details.</p>
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    1. POWhat is the difference between =~ and match() when pattern matching?
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    1. USiamnotmaynard
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    1. CO`+1` to you!Your findings are perfect,understood! but still confusion i am having about the `hash` what you are trying to say! could you explain that with a code or something else - so that your thought can be visible to me! please
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    2. CO@DoLoveSky Edited with some output using irb.
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    3. CO@DoLoveSky I highly recommend you read through the ruby docs referenced in my answer. There is a lot more information there that could be very helpful.
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