Can someone please explain this regex?
^(?=.*prodCode=).*$
Can someone please explain this regex?
^(?=.*prodCode=).*$
From this nice regex explainer:
NODE EXPLANATION
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^ the beginning of the string
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(?= look ahead to see if there is:
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. any character except \n
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prodCode= 'prodCode='
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) end of look-ahead
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. any character except \n
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$ before an optional \n, and the end of the string
EDIT
Since the regex in the text of the question has changed, the next-to-last line in the explanation would change to:
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.* any character except \n (0 or more times (matching
the most amount possible))
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From the beggining of line searhinng position any symbols before prodCode=
. (?=)
means just check of position not match. So in your situation if in the line exists string like any symbol + prodCode=
then we match whole line if not then return false.
This matches if the string has prodCode=
anywhere in it and matches the complete string.
Another way of writing it (roughly, abusing a method return value as the regex matcch) would be
if (s.indexOf("prodCode=") != -1)
return s;