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Most languages have support for Regex (Regular Expressions) but, for example, Javascript does not have Negative Lookhead ((?<) , however already . NET Framework has virtually all functions of Regex. My question is:
The Regex syntax, function and spelling varies along with the language being refocused?
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NAY
It does not vary, what happens is that it is always in development, and there is a gap between the publication of a new resource and the libraries of various languages support them.
However, an expression has the same functionality in any language. What may occur is, if it is a new expression/resource, this language may not yet support.
But, vary, does not vary.
Those who are negative, please speak.
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There are variations yes. Take a look here on Wikipedia
– Sergio
The regularexpressions.info has several tables comparing the resources present in various languages and platforms (I remember having a tabelona with everything together, but I never find it when I look for...)
– mgibsonbr