CODEWITHSUNDEEP
javascriptregex
phantomsays
phantomsays

Reputation: 187

javascript regex match works but replace doesnt work

I am trying to use regex replace with a regex I have. When I use the match method it returns the array with the proper index and match but when I use replace and add the replace string it wouldnt work.

var a = "$#,##0.00".match("[\\d+-,#;()\\.]+");
console.log(a);

Returns ["#,##0.00", index: 1, input: "$#,##0.00"].

var b = "$#,##0.00".replace("[\\d+-,#;()\\.]+","");
console.log(b);

Returns $#,##0.00 whereas I expect it to return just the $

Can someone point out what am I doing incorrectly? Thanks Link to the example is:

var a = "$#,##0.00".match("[\\d+-,#;()\\.]+");
console.log(a);
var b = "$#,##0.00".replace("[\\d+-,#;()\\.]+","");
console.log(b);

Upvotes: 0

Views: 145

Answers (1)

ibrahim mahrir
ibrahim mahrir

Reputation: 31682

.match only accepts regexps. So if a string is provided .match will explicitly convert it to a regexp using new RegExp.

.replace however accepts both a string (which will be taken literally as the search) or a regexp, you have to pass in a regexp if you want it to use a regexp.

var b = "$#,##0.00".replace(new RegExp("[\\d+-,#;()\\.]+"), "");
//                          ^^^^^^^^^^^                  ^

or using a regexp literal:

var b = "$#,##0.00".replace(/[\d+-,#;()\.]+/, "");

Upvotes: 4

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