when learning the annotation capabilities of regular expressions, comments always cause matching exceptions. For example, use d{2} match 24 can be successful. If you add a comment, it becomes d{2}(?-sharp) match 24 fails. after looking up a ...
const datas =[ "https: img.codeshelper.com upload img 2021 03 09 1tcsu5c0vun5800.png", "https: img.codeshelper.com upload img 2021 03 09 mc3p5hxjed25801.png", "https: img.codeshelper.com upload img 2021 03 09 b0sxs...
1. Requirements: write a regular 2 that can automatically add a space for every 4 digits written. Problem: the regular (or incorrect) is written out, but the spaces cannot be deleted! 3. Picture 4. Code innput listening: `$("ul.information-...
I want to extract SyncKey = {"Count": 4,"List": [{"Key": 1,"Val": 694398478},{"Key": 2,"Val": 694398818},{"Key": 3,"Val": 694398792},{"Key": 1000,"Val"...
when trying to use regular matching 12-128, it is found that it can match to 129, such as the question. 192.168.0.(12[0-8]|1[0-1][0-9]|[2-9][0-9]|1[2-9]) True is returned when matches 129. judgment 255 will also match the first two digits 25. h...
ask for help, intercept the value after token the processing method I use is a bit tedious, is there a sentence of code that can solve ...
java wrote a rule himself. You can t verify a character such as three arbitrary characters, (xx) at the beginning of getcol. String str = "798>getcolsum(fmoney)>getcolavg(fmoney)"; String pattern = "getcol[ w]{3} ([ ...
userAgent is as follows: Mozilla 5.0 (Macintosh; Intel Mac OS X 10_12_4 ) AppleWebKit 537.36 (KHTML, like Gecko ) x09 x09 x09Chrome 55.0.2883.95 Mozilla 5.0 (compatible; Baiduspider 2.0; +http: www.baidu.com search spider.html xA3 xA9 t...
in the introduction to the replace () method of w3school, there is an example: name = "a", "b" ; name.replace( "([^"]*)" g, " $1 "); a , b and replace it with the following abbreviation...
the requirement is 010203 = > [01JEI 02jue 03] to write a regular "010203 ". Split (regular) = [01J 02pr 03] how do you write this? (0 [1-9] | (1 [0-2])) + g.test ( 0122 ) Why true is returned here. I want to match the number between 01 and 12....
var num = 1234567.89 ; var num1 = num.replace( (?<= d)(?=( d{3})+ b) g, , ); b 1,234,567.89 var num2 = num.replace( (?<= d)(?=( d{3})) g, , ); b 1,2,3,4,567.89 b b ...
for example, I have a string whose content is: Python has a rich and powerful library. It is often nicknamed glue language and can easily connect modules made in other languages (especially C CPP). A common application scenario is to use Python to qui...
What should I do if the string is split into two parts in front of parentheses and in parentheses? for example, ABC1.1 (1) is split into ABC1.1 and 1 % DEF2.1 (3) is split into% DEF2.1 and 3 @ I GHI3.3 O GHI3.3 (5) is split into @ I GHI3.3 O GHI3.3 an...
I have the following string: <some texts hier><br> you can see that its format is wrong. I want to use a regular expression to find the space in the angle brackets and replace it with the angle brackets. The desired output is <font ...
var newsname; ctrl.checkNameLegal = function () { if (ctrl.fileName) { var exports = ^(?![.])[ u4e00- u9fa5_.a-zA-Z0-9]+$ ig; if (exports.test(ctrl.fileName)) { newsname = ctrl.fileName; } else { ctrl.fileName = newsname; } } else { newsname = ...
for example, in a sequence, such as string = "I am on Air China flight CA1760, which takes off at 715 30 and has a high punctuality rate. " the one to be searched is S1 = flight . You can get the return value with both findall and search. Using r...
{{first.DATA}} n :{{keyword1.DATA}} n :{{keyword2.DATA}} n :{{keyword3.DATA}} n :{{keyword4.DATA}} n {{remark.DATA}} n $arr=array(); $arr[ first ]=""; $arr[ keyword1 ]=""; $arr[ keyword2 ]=""; $arr[ keyword3...
feel [^] and (!?) What s the difference between them? ...
for example: var str="1234HAGSFC" :334 123 4HA GSFC :4321 1234 HAG SF C ... ...
this is what I originally wrote: var s = "var a = test ; 1234678" s.replace( [ s S]*? n?$ , ); later found that there is such a code in the code: var a = : +host; 123456 var s = " tset "; test var...
how do you write the following code in node? const hash = crypto.createHash( MD5 ) hash.update( aesKey ) const aesKeySignStr = hash.digest() const iv = Math.random().toString( 36 ).substr( 2 ) const cipher = crypto.createCipher( aes-128-cbc , a...
what plug-in caused this? ...
now there is such a scene: 1. Develop a Mini Program background, the other side provides an interface document, the interface needs to be signed, the background PHP to do signature 2. Press the normal front end to take the document directly and use the...
didn t the email protocol of a long time ago allow recipients to set more than one? Or is there any other reason why the mail system has to design an extra redundant function? ...
spin locks are easy to understand, which is constantly polling, so what is the mechanism of mutexes? What are the drawbacks of this mechanism that make it better to use spin locks in some situations? ...