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I've found several online tools that allow me to see the effect of a regular expression I have created on sample text, but I am looking for a tool that would make expression suggestions based on a portion of text selected.
For Example:
Let's say I have a string like this,
obssoCookie=set-usermember1-404343994;Version=1;Path=/;Domain=10.118.195.239;Discard
and I want to extract everything between obssoCookie= and the first ; I'd like a tool that would allow me to select that part of the text and respond with a suggested regular expression.
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$ means "Match the end of the string" (the position after the last character in the string). Both are called anchors and ensure that the entire string is matched instead of just a substring.
Regular expressions, most commonly referred to as RegEx (pronounced: Rej-Ex), are a sequence of characters that allows the user to create patterns that help match, locate, and manage any string data. In Alteryx, you can use the RegEx tool to replace, tokenize, parse, and match string values.
If you want to match for the actual '+', '. ' etc characters, add a backslash( \ ) before that character. This will tell the computer to treat the following character as a search character and consider it for matching pattern. Example : \d+[\+-x\*]\d+ will match patterns like "2+2" and "3*9" in "(2+2) * 3*9".
[] denotes a character class. () denotes a capturing group. [a-z0-9] -- One character that is in the range of a-z OR 0-9. (a-z0-9) -- Explicit capture of a-z0-9 .
Check out txt2re.
Using your sample text, with the relevant portions selected, and C# selected for the code to be generated, this is the result.
It takes some getting used to, but the basic steps are:
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I found this recently, uses genetic algorithm to find best matching pattern given a few examples that you generate yourself:
http://regex.inginf.units.it/
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