The fix is to use whitespace followed by non-whitespace other than > to detect the beginning of attributes. PYK : I patched the regular expression to fix an issue where the attributes group could pick up part of the tag in documents containing tags with similar prefixes. If you are really dealing with XML, it is better to use a proper tool like TclDOM or tDOM. ( Stefan Vogel)ĭKF: I agree with that last point. Don't do this for large texts or texts with many nested xml-tags because the regular-expression-machine is not the the right tool to parse large,nested files efficiently. LV: the first regular expression should be seen like this: Why have, and then the rest of the characters inside a - that just makes the string have there twice, right? If matchVar is specified, its value will be only the part of the string that was matched by the exp. Regexp has syntax: regexp ?switches? exp string ?matchVar?subMatchVar subMatchVar. Regular Expression Debugging Tips More tools. Redet Another tool for learning about and working with REs. re_syntax URI detector for arbitrary text as a regular expression Arts and crafts of Tcl-Tk programming Regular Expressions Regular Expression Debugging Tips Visual Regexp A terrific way to learn about REs.
See Also Example Regexes to Match Common Programming Language Constructs Extracting numbers from text strings, removing unwanted characters, Michael Cleverly,, An explanation with several examples. It also serves as both a library of useful expressions to include in your own code.įor advanced examples, see Advanced Regular Expression Examples You can also find some regular expressions on Regular Expressions and Bag of algorithms pages. Regular Expression Examples is a list, roughly sorted by complexity, of regular expression examples. To create a regular expression, you must use specific syntaxthat is, special characters and construction rules. At Least 1 Alpha Character Interspersed with 0 or More Digits.split a string into n-length substrings.Word Splitting, Respecting Quoted Strings.Maintain proper spacing when formatting for HTML.Turn a string into %hex-escaped (url encoded) characters (part 2).Turn a string into %hex-escaped (url encoded) characters:.Regular Expression for parsing http string.
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