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I have a string url as follows:
var url = '/test/mybin/processes/edit.jsp?id={processId}';
I want to extract the string "processId" from above url. I can get it using indexOf and substring methods, but is there a better alternative to do it? Can we do it using Regex?
var procid = url.split("id=")[1];
You can easily use a regex:
url.match(/\{([^}]*)\}/)[1];
But for this simple pattern, using indexOf and substring, while not as terse, will have much better performance. TIMTOWTDI
'/test/mybin/processes/edit.jsp?id={processId}'.split('{')[1].split('}')[0]
JavaScript strings has regex support embeded:
var processId = url.match(/\?id=(.+)/)[1];
Only thing U need - be familiar with regular expressions
And if braces are problem:
var processId = url.match(/\?id=\{(.+)\}/)[1];
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i want remove all ',' from my string with regex in javascript.
this is an example from my string:
45,454,545
and i want my string convert to this:
45454545
Comma isn't a special character in regex, so you can just use /,/. Add the global flag and you're done.
console.log('45,454,545'.replace(/,/g, ''))
Try this,
var str = "45,454,545";
var res = str.replace(/,/g, "");
console.log(res);
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I am willing to know how can I check if the a phone number contain the following prefixes +44, 0044 or 0 and if so it will be removed? I know I to remove a number of characters or a substring but how do I check if that substring is in the beginning?
Thanks in advance
You could with regex /^(\+44|0044|0)/g
function rem(str){
return str.replace(/^(\+44|0044|0)/g,'')
}
console.log(rem('0044987987'));
console.log(rem('04478687'));
console.log(rem('+447783'));
You can use indexOf to check the index of those prefix.
"+44-----".indexOf("+44") // returns 0
That should be enough for what you want.
You can simply test against a regex pattern.
Or use it for a replace.
const re_tel44 = /^[+]?0{0,2}(?:44)?(\d{5,})$/;
let phonenumber = '+4412345';
console.log(re_tel44.test(phonenumber));
if(re_tel44.test(phonenumber))
phonenumber = phonenumber.replace(re_tel44, '$1');
console.log(phonenumber);
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I want the text which is outside of brackets, for eg.
Text is - Outside (inside)
and what I expect is - Outside
Can someone please help me to achieve this.
You can use slice & use indexOf to get the first (. This will extract all the characters before first (
let str = 'Outside (inside)'
let substr = str.slice(0, str.indexOf('('));
console.log(substr.trim())
If you wanted to remove all bracketed text from the string you could use
let str = 'Outside (inside)test(d 342 dd3d)dd(t423t t)dd()fasf(fsdfds32dfs)';
console.log(str.replace(/(\([\w\d ]*\))+/g, ''))
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Could someone with more regex experience than me help me out?
return path.replace(/\//g, '.').replace(/^\./, '');
I have found this regex in a js file within a giant app. The JS when run through npm node-minify or any of the others sees it as a comment and turns it into this:
return path.replace(/\g, '.').replace(/^\./, '');
I get the first bit is replacing all \ with a . and the second bit trims any leading . from the string. Can i change this so the regex pattern is wrapped in quotes?
Just use the RegExp constructor and quote your pattern.
const path = '/usr/bin/env';
const matchSlash = new RegExp('/', 'g');
const translate = path => path.replace(matchSlash, '.').replace(/^\./, '');
console.log(translate(path));
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I need to split${SOMENAME} (${THISNAME}) ${THESENAME}
I just need to extract the words SOMENAME THISNAME and THESENAME from the above string. Is it possible?
You can pass in a regular expression separator as part of the .split() function.
var string = "${SOMENAME} (${THISNAME}) ${THESENAME}";
var re = /\W+/;
var arr = string.split(re);
document.write(arr);
Take a look at String.prototype.split for more information.
If you only need extract the words, this could be a simple solution:
var s = "${SOMENAME} (${THISNAME}) ${THESENAME}";
var words = s.match(/([A-Z])\w+/g);