Created
February 26, 2014 16:51
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Regexp using negative lookahead and negative look behind assertions
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| irb(main):040:0> testcases | |
| => ["hello world", "'hello world", "'hello' world", "hello' world"] | |
| irb(main):041:0> testcases.each { |i| puts /(?<!')hello(?!')/.match(i) } | |
| hello | |
| => ["hello world", "'hello world", "'hello' world", "hello' world"] |
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