Replace or Strip a specific character between two characters in javascript using regex

Question

replace a specific character between two characters in javascript using regex

My specific requirement is

i want to replace single quote between double quotes.

Ex: sdadads'sdasdads"this is the 'quote" --> sdadads'sdasdads"this is the quote"

i tried

`sdadads'sdasdads"this is the 'quote"`.replace(/\"[^\']\"/g, 'replaced')

but the output is

sdadads'sdasdadsreplaced

Yes there can be multiple single quotes, i want to remove all single quotes between double quotes. — Sandeep Kumar, Dec 19 '18 at 19:41
What do you do when you encounter this `asdf"asdf"d'asdf'asdf"` ? — , Dec 19 '18 at 21:07

anubhava · Accepted Answer · 2018-12-19T20:15:55.480

2

You may use this .replace with a function:

var str = `"this 'is 'the 'quote"`

var repl = str.replace(/"[^"]*"/g, function($0) { 
           return $0.replace(/'/g, ""); });

console.log(repl);
//=> "this is the quote"

Using a simple regex to match "..." string using negated character class
Inside the function we remove all single quotes

edited Dec 19 '18 at 20:15

answered Dec 19 '18 at 19:48

anubhava

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Thank you brother, thank you very much it works but i needed the regex thing which i got in another answer. – Sandeep Kumar Dec 19 '18 at 19:51
abhinav you are stripping of the double quotes also – Sandeep Kumar Dec 19 '18 at 20:14
oh yes, fixed it now – anubhava Dec 19 '18 at 20:16
1

Thank you very much – Sandeep Kumar Dec 19 '18 at 20:17
Hey just asking whether you know there is a proper way to parse django variable to json. – Sandeep Kumar Dec 19 '18 at 20:20
I am facing a lot of issues parsing django variable to json i have tried safe and escapejs filters but still get issues while parsing it. – Sandeep Kumar Dec 19 '18 at 20:21
I don't know `djongo` but, you can take a look at this question: https://stackoverflow.com/questions/19573747/parsing-json-fields-in-python – anubhava Dec 19 '18 at 20:22

The fourth bird · Answer 2 · 2018-12-19T20:07:19.433

1

You could capture the double quotes itself and what is in between the double quotes in a capturing group. Then use a replacement function where you replace all the single quotes in the second capturing group with an empty string

(")([^"]+)(")

let str = `sdadads'sdasdads"this is the 'quote"`;
let res = str.replace(/(")([^"]+)(")/g, function(_, g1, g2, g3) {
  return g1 + g2.replace("'", "") + g3;
});
console.log(res);

edited Dec 19 '18 at 20:07

answered Dec 19 '18 at 19:29

The fourth bird

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I didn't downvote you but I would imagine it's because this only handles one single quote. Also, why did you replace single quotes with 'replace'? The question is clearly about _removing_ single quotes. – T Nguyen Dec 19 '18 at 19:34
buddy i want to strip that single quote between double quotes only can you help – Sandeep Kumar Dec 19 '18 at 19:41
Exactly what i was looking it to be thanks a lot buddy. – Sandeep Kumar Dec 19 '18 at 20:13
Actually there is no need of any capture groups. Moreover `.replace("'", "")` will replace only one single quote. – anubhava Dec 19 '18 at 20:17
@anubhava You are right, much easier if you replace on the full match. – The fourth bird Dec 19 '18 at 20:23

score 1 · Answer 3 · answered Dec 19 '18 at 19:46

1

Variable width negative lookbehind is not permitted in Javascript, so you may use \K operator to find if a ' is between two double quotes or not using this regex,

"[^']*\K'(?=[^']*")

Explanation:

" --> Matches a double quote
[^']* --> Matches zero or more characters anything except a single quote
\K --> Resets whatever matched so far
' --> Matches a literal single quote
(?=[^']*") --> Look ahead ensuring there is a double quote after zero or more any characters except a single quote

Live Demo

answered Dec 19 '18 at 19:46

Pushpesh Kumar Rajwanshi

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Bht Bht Dhanyawad bhai, bht der se nhi mil rha tha. – Sandeep Kumar Dec 19 '18 at 19:50
1

There is no `\K` in Javascript. This is PCRE feature – anubhava Dec 19 '18 at 19:50
1

Sorry my bad... It just slipped my mind that \K doesn't work for JS. Please select Anubhava's answer as accepted one. – Pushpesh Kumar Rajwanshi Dec 19 '18 at 19:54
Thank you very much – Sandeep Kumar Dec 19 '18 at 20:16

Replace or Strip a specific character between two characters in javascript using regex

3 Answers3