regex

问题 wanted to match the non-latin char. tried it. as per my understanding if (a.matches("[\\x8A-\\xFF]+")) should return true but its false. String a = "Ž"; if (a.matches("[\\x8A-\\xFF]+")) { } 回答1: Judging from your title: Regex to match non-latin char with ASCII 0-31 and 128-255 it seems you're after all characters except those in range 32-127 and you're surprised Ž doesn't match. If this is correct, I suggest you use the expression [^\x20-\x7F] ( "all characters except those in range 32-127" )

问题 Here is a sample string: {three / fifteen / one hundred} this is the first random number, and this is the second, {two / four} From the brackets, I need to return a random value for example: One hundred is the first random number, and this is the second, two My code: function RandElement($str) { preg_match_all('/{([^}]+)}/', $str, $matches); return print_r($matches[0]); } $str = "{three/fifteen/one hundred} this is the first random number, and this is the second, {two/four}"; RandElement($str

问题 In Python, we have the re.VERBOSE argument that allows us to nicely format regex expressions and include comments, such as import re ric_index = re.compile(r'''( ^(?P<delim>\.) # delimiter "." (?P<root>\w+)$ # Root Symbol, at least 1 character )''',re.VERBOSE) Is there something similar in C#? 回答1: You can use verbatim string (using @ ), which allow you to write: var regex = new Regex(@"^(?<delim>\\.) # delimiter ""."" (?<root>\\w+)$ # Root Symbol, at least 1 character ", RegexOptions

问题 I am trying to use the exec method on the JavaScript Regex object and can get into an infinite loop where exec does not return a null depending on the expression. Here is a test function I wrote to illustrate the problem. I ran it in Chrome 32. I am defining the Regex and match variables outside the loop. The max / Reached Max test is there to break out of the infinite loop. function textExec(reg, text, max) { max = max || 10 var match = null; while (match = reg.exec(text)) { console.log

问题 I'm looking for a simple regular expression (I think), that would return all html tags not having a "name" attribute, but my weak regexp skills won't help me much. Finding a html tag is not a problem, but the "which does not contain" is. I simply have no idea (well I had, but none of them work). Any clue? 回答1: First of all, you should not use regex for this task. An HTML parser surely exists in whatever language you are using and is way better suited for this. Now, if you need to use regex

问题 I have a large file, about 10GB. I have a vector of line numbers which I would like to use to split the file. Ideally I would like to accomplish this using command-line utilities. As a regex: File: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Vector of line numbers: 2 5 Desired output: File 1: 1 2 3 File 2: 4 5 6 7 8 9 10 11 12 File 3: 13 14 15 16 17 18 回答1: This might work for you: csplit -z file 2 5 or if you want regexp: csplit -z file /2/ /5/ With the default values, the output files will

问题 I need an expression that can accept only Hebrew letters and at least one space char. I tried this for Hebrew letters, but it doesn't match sentences with Hebrew text and spaces: result = Regex.IsMatch(txtName.Text, @"[\u05D0\u05D1\u05D2\u05D3\u05D4\u05D5\u05D6\u05D7\u05D8\u05D9\u05DA\u05DB\u05DC\u05DD\u05DE\u05DF\u05E0\u05E1\u05E2\u05E3\u05E4\u05E5\u05E6\u05E7\u05E8\u05E9\u05EA]"); How can I represent all the Hebrew letters and at least one space char in regEx? 回答1: You are looking for

问题 How can I write a regular expression in javascript that only allows users to write this: abc.def , abc-def or abc So basically match a pattern that only contains letters (only lowercase [a-z]) and a . or - . But does not match - or . at the beginning or end of string or multiple times(only one . or - per string) So not allowing them to do: ..... abc...abc abc.abc.... abc----.... ...abc.abc .abc -abc etc. 回答1: Regex would be: /^[a-z]+([\.\-]?[a-z]+)?$/ JavaScript: var text = 'abc.def'; var

问题 I'm trying to build a RegEx to parse the coefficients of a polynomial from a string. I thought I'd found a solution until I found one particular example, which I suspect is badly formatted, that broke my RegEx. I'm also not sure my solution is the most elegant. Here are some examples of the strings I need to parse: polys = ['1x', '3.8546E-27x^4-2.4333E-20x^3+5.1165E-14x^2+3.7718E-6x-6.1561E-1', '6.13159E-3x+0.348', '0.0100708x-40', '6.103516E-3x', '1E-6x', '1.4846859E-6x', '2435', '2.7883E

问题 I want to remove all words inside brackets and square brackets. I'm using this regex, but it only removes words inside brackets. It does not work with square brackets... var str = 'hey [xx] (xhini) rexhin (zzz)'; var r = str.replace(/ *\([^)]*\)*\] */g, ''); r should be hey rexhin Any suggestions? 回答1: You can use this regex: var str = 'hey [xx] (xhini) rexhin (zzz)'; var r = str.replace(/(\[.*?\]|\(.*?\)) */g, ""); //=> hey rexhin \[.*?\] will find square brackets and string inside them \(.*