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Replace braces word with parentheses (#23)

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Change wording to reflect notation in section covering lookaheads and lookbehinds: braces (i.e., ` { } `) --> parentheses (i.e., ` ( ) `)
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Iain Gillis 2017-07-27 18:23:14 -06:00 committed by Zeeshan Ahmed
parent 49960ef20d
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1 changed files with 4 additions and 4 deletions
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@ -341,10 +341,10 @@ by `$` character. Following are the lookarounds that are used in regular express
### 4.1 Positive Lookahead
The positive lookahead asserts that the first part of the expression must be followed by the lookahead expression. The returned match
only contains the text that is matched by the first part of the expression. To define a positive lookahead braces are used and within
those braces question mark with equal sign is used like this `(?=...)`. Lookahead expression is written after the equal sign inside
braces. For example, the regular expression `(T|t)he(?=\sfat)` means: optionally match lowercase letter `t` or uppercase letter `T`,
followed by letter `h`, followed by letter `e`. In braces we define positive lookahead which tells regular expression engine to match
only contains the text that is matched by the first part of the expression. To define a positive lookahead, parentheses are used. Within
those parentheses, a question mark with equal sign is used like this: `(?=...)`. Lookahead expression is written after the equal sign inside
parentheses. For example, the regular expression `(T|t)he(?=\sfat)` means: optionally match lowercase letter `t` or uppercase letter `T`,
followed by letter `h`, followed by letter `e`. In parentheses we define positive lookahead which tells regular expression engine to match
`The` or `the` which are followed by the word `fat`.
<pre>