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I have a list of variables:
variables = ['VariableA', 'VariableB','VariableC']
which I'm going to search for, line by line
ifile = open("temp.txt",'r')
d = {}
match = zeros(len(variables))
for line in ifile:
emptyCells=0
for i in range(len(variables)):
regex = r'('+variables[i]+r')[:|=|\(](-…
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I was looking at the regular expression for validating various data types from the (OWASP Regex Repository).
One of the regular expressions in there is called safetext and looks like:
^[a-zA-Z0-9\s.\-]+$
My first question is:
Is this regular expression correct?
complementary question
If this…
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I am writing a tool to help students learn regular expressions. I will probably be writing it in Java.
The idea is this: the student types in a regular expression and the tool shows which parts of a text will get matched by the regex. Simple enough.
But I want to support several different regex…
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I'm writing a piece of client-side javascript code that takes a function and finds the derivative of it, however, the regex that's supposed to match with the power rule fails to work in the context of the javascript program, even though it sucessfully matches when it's used with an independent regex…
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I need to be able to check for a pattern with | in them. For example an expression like d*|*t should return true for a string like "dtest|test".
I'm no regex hero so I just tried a couple of things, like:
Regex Pattern = new Regex("s*\|*d"); //unable to build because of single backslash
Regex Pattern…
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There are so many questions on regex-negation here on SO.
I am not sure I understand why people feel the need to negate a regex.
Why not use something like grep -v that shows only the results that do not match the regex?
$ ls
april august december february january july june march may…
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I've searched for questions like this, but all the cases I found were solved in a problem-specific manner, like using !g in vi to negate the regex matches, or matching other things, without a regex negation.
Thus, I'm interested in a “pure” solution to this:
Having a set of strings I need to filter…
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I have a regex, for example ([m]{2}|(t){1}). It matches ma and t and doesn't match bla.
I want to negate the regex, thus it must match bla and not ma and t, by adding something to this regex. I know I can write bla, the actual regex is however more complex.
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I have regex (for example)
([m]{2}|(t){1})
and it matches ma and t and doesnt match bla
I want it to match bla and doesnt match ma and t
by adding something to this regex, i know i can write bla, my real-life regex is more complex.
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Hi folks,
I would like to negate a set of words using java regex.
Say, I want to negate cvs, svn, nvs, mvc. I wrote a regex which is ^[(svn|cvs|nvs|mvc)].
Some how that seems not to be working. Could you please help? Thanks.
.\J
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