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string.c: Follow up to ae2359f602bb467ca755eef02d73d361d35eaed7

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* Mention `\0`
* Make the example of hash replacement meaningful
This commit is contained in:
Yusuke Endoh 2021-11-03 03:52:28 +09:00
parent a4f834c41e
commit 4b248e7994
1 changed files with 6 additions and 5 deletions
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11
string.c
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@ -11859,7 +11859,7 @@ rb_enc_interned_str_cstr(const char *ptr, rb_encoding *enc)
* However, you may refer to some special match variables using these * However, you may refer to some special match variables using these
* combinations: * combinations:
* *
* - <tt>\&</tt> corresponds to <tt>$&</tt>, * - <tt>\&</tt> and <tt>\0</tt> correspond to <tt>$&</tt>,
* which contains the complete matched text. * which contains the complete matched text.
* - <tt>\'</tt> corresponds to <tt>$'</tt>, * - <tt>\'</tt> corresponds to <tt>$'</tt>,
* which contains string after match. * which contains string after match.
@ -11894,11 +11894,12 @@ rb_enc_interned_str_cstr(const char *ptr, rb_encoding *enc)
* the replacing string is the value for that key: * the replacing string is the value for that key:
* *
* h = {'foo' => 'bar', 'baz' => 'bat'} * h = {'foo' => 'bar', 'baz' => 'bat'}
* 'food'.sub('oo', h) # => "fd" * 'food'.sub('foo', h) # => "bard"
*
* Note that a symbol key does not match:
*
* h = {foo: 'bar', baz: 'bat'} * h = {foo: 'bar', baz: 'bat'}
* 'food'.sub('oo', h) # => "fd" * 'food'.sub('foo', h) # => "d"
* h = {foo: :bar, baz: :bat}
* 'food'.sub('oo', h) # => "fd"
* *
* <b>Block</b> * <b>Block</b>
* *