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Regular Expression Is Not Working


Not the answer you're looking for? If it works and can be generated quickly, is legibility important? But for developers who came here looking for a fast emergency fix for an outlier case then this solution should not be overlooked. I'll keep this in mind! have a peek here

up vote 1 down vote favorite I recently decided that enough was enough -- I was going to learn to use grep fluently. By dynamic, I meant that the pattern required a string concatenation, as opposed to a hard-coded value. However, I'd like to know if it's possible to match lines that don't contain a specific word (e.g. javascript regex share|improve this question edited Mar 19 '12 at 20:11 d_inevitable 3,5091342 asked Mar 19 '12 at 20:05 Trip 12.9k28106208 What's the problem?

Regex Not Working C#

So, in my example, every empty string is first validated to see if there's no "hede" up ahead, before a character is consumed by the . (dot). I think you understand what I'm going for, but just to be clear, I want to fail the test if any character anywhere in the string is not in the whitelist. Do Deadeye or Tactical Visor target an invisible Sombra? Awesome.

This does not work in JavaScript, which treats [] as an empty character class that always fails to match, and [^] as a negated empty character class that matches any single Why would this A-10 Thunderbolt be flown over rural New Hampshire? Compose and analyze regex patterns with RegexBuddy's easy-to-grasp regex blocks and intuitive regex tree, instead of or in combination with the traditional regex syntax. Regex Not Character Brainfuck Interpreter written in x86 Assembly My boss asks me to stop writing small functions and do everything in the same loop Sum acting weird for large values What's the easiest

Why does my Probability function not work How to complete function which is not defined for all interval Is the Caesar cipher really a cipher? You just have to use exec. Did the Gang of Four really thoroughly explore "Pattern Space"? The regex (?!hede).

Input: hoho hihi haha hede Code: # grep "Regex for doesn't contain hede" Input Desired output: hoho hihi haha regex regex-negation share|improve this question edited Dec 17 '15 at 15:33 community Regex Not Working Python To test against the entire string, use anchors ("^" and "$") and repetition ("+" or "*", depending on whether you want to allow the empty string). Summary: I tried to test most proposed solutions, some Optimizations are possible for certain words. Look through just a handful of files or folders, or scan entire drives and network shares.

Regex Not Working Java

grep -v). See the demo here. Regex Not Working C# Is there a difference between "Would you like some more" and "Would you like any more"? Javascript Regex Test Not Working Do Deadeye or Tactical Visor target an invisible Sombra?

How to check whether a partition is mounted by UUID? Not the answer you're looking for? The closing bracket ], the caret ^ and the hyphen - can be included by escaping them with a backslash, or by placing them in a position where they do not Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count). Regex Not Word

up vote 0 down vote favorite 1 I am trying to validate year using Regex.test in javascript, but no able to figure out why its returning false. We want to match all the lines except hede , there may be a possibility of blank lines also in the input . Cannot insert the value NULL into column Are convertible full face helmets as safe as regular ones? Check This Out Brainfuck Interpreter written in x86 Assembly "Storytelling" in the introduction: Math papers Score a hand of Hearts Why do Phineas and Ferb get 104 days of summer vacation?

See ‘grep’ regular expression syntax. –Radu Rădeanu Jan 17 '14 at 21:45 add a comment| 3 Answers 3 active oldest votes up vote 4 down vote accepted If you want to Regex Or Ruby treats empty character classes as an error. Do Deadeye or Tactical Visor target an invisible Sombra?

Update: .match() returns an array: ["(25.774252, -80.190262)", "(18.466465, -66.118292)", ... ] which does not seem to be very useful.

The usual metacharacters are normal characters inside a character class, and do not need to be escaped by a backslash. In your case were you are creating it from a string you must use the object creation form. You must add beginning and end of the string in this regexp share|improve this answer answered Feb 22 '11 at 6:18 Falcon 1,07311224 add a comment| up vote 1 down vote Regex Online What is the word for when someone is overly nice and actually isnt nice at all?

I was just spending earlier today discovering that Javascript doesn't support POSIX-based ways of identifying Unicode characters, and here you have the Unicode range solution that I was realizing I was I'm currently syncing a RAID5 array, the progress of which can be monitored by reading /proc/mdstat. share|improve this answer answered Jan 2 '09 at 8:03 community wiki Josh Lee 6 Some tools, and specifically mysqldumpslow, only offer this way to filter data, so in such a Can leaked nude pictures damage one's academic career?

Brainfuck Interpreter written in x86 Assembly Overlaying two images How to improve player engagement in video call for virtual tabletop game? Do I need an Indie Studio Name? more hot questions question feed default about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed

Hot Network Questions Why does this 7-Segment Display not function properly? For Example if the First two letters of the search string are not the Same, answer 03 can be expanded to ^(?>[^R]+|R+(?!egex Hero))*$ resulting in a small performance gain. So .* would match the whole line. The idea is simple.

Regex Her Regex Her Regex Her Regex Her Regex Her Regex Her Regex Hero is a real-time online Silverlight Regular Expression Tester. share|improve this answer answered Feb 22 '11 at 6:17 icktoofay 84.2k9154183 I'm not sure if I should open a new uestion for this, but does Javascript regex support "punctuation"? up vote 4 down vote favorite 2 I'm doing a small javascript method, which receive a list of point, and I've to read those points to create a Polygon in a I'm still upvoting your answer, though, because it's a nice solution.

Is hour of day a categorical variable? You can try: '12:30 AM'.replace(/\n/, '').match(/\d{1,2}:\d\d\s((AM)|(PM))/) share|improve this answer answered Mar 19 '12 at 20:20 Charles 5,09324788 add a comment| up vote 0 down vote Combining the ideas of Matt, c0deNinja Regex Hero is a real-time online Silverlight Regular Expression Tester. Why would you compare 'A' with 0x41?

And you could easily generate the regex string for long strings using iterative concatenation. I'm technical referent but I lost the lead for technical decisions Using a barrel jack with higher than rated current but lower voltage? Browse other questions tagged javascript regex or ask your own question. looks ahead to see if there's no substring "hede" to be seen, and if that is the case (so something else is seen), then the . (dot) will match any character

Why? 2 How to Properly Format a Regex in JavaScript -1 RegExp returning null despite containing a match 2 Regex not working as expected in JavaScript 2 Why doesn't this particular As in: RegExp("^\p{Punctuation}]+$"); –Questioner Feb 22 '11 at 7:27 add a comment| up vote 3 down vote If you're trying to check whether the target string only contains whitelisted characters, you When I am done, I remove the unique "Tag" from all lines (replacement string is empty): Search string:<@#-unique-#@> Replace string: Replace-all share|improve this answer edited Apr 26 '13 at 22:46 community As mentioned, this is not something regex is "good" at (or should do), but still, it is possible.