Created
April 17, 2016 20:29
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Different regular expression lookahead exaxmples
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| assert 'hello world' =~ /\w{5}(?<=hello) world/ | |
| assert 'hello world' ==~ /hello (?=world)\w{5}/ | |
| assert 'x9' ==~ /.(?<=x)9/ | |
| assert 'x9' ==~ /x(?=9)./ | |
| assert 'x9' ==~ /\w(?<=x)9/ | |
| assert 'x9' ==~ /x(?=9)\d/ | |
| assert 'x9' ==~ /\w\d/ | |
| assert 'x9' ==~ /x\d/ | |
| assert 'x9' ==~ /x9/ | |
| assert 'x49' ==~ /x(?=49)..(?<=49)/ | |
| assert 'x4' ==~ /x(?=4).(?<=4)/ | |
| assert 'blah <h2>hi</h2> blah'.find('(?<=<h2>).+(?=</h2>)') == 'hi' |
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