CODEWITHSUNDEEP
javascript
Jono
Jono

Reputation: 18118

Replacing all symbols in a javascript string

Hi all ia m trying to replace all characters of "+" in a string by using the code below:

var findValue = "+";
var re = new RegExp(findValue, 'g');
searchValueParam = searchValueParam.replace(re, " ");

However i recieve this exception:

SyntaxError: Invalid regular expression: nothing to repeat

previously i applied just searchValueParam = searchValueParam.replace("+", " "); but that only replaces the first occurrence, not all.

Any suggestions?

Upvotes: 0

Views: 130

Answers (3)

Blago
Blago

Reputation: 4737

If you want to keep the code you have, replace

var findValue = '+';

with 

var findValue = '\\+';

Plus has a special meaning (quantifier) in a regular expression. This is why we need to escape it with a backslash: \+. However, when you place this in a string, the backslash itself has to be escaped as it has a special meaning in a string. This is how we end up with '\\+'.

In conclusion, this

var re = new RegExp('\\+', 'g')

is equivalent to this

var re = /\+/g;

Upvotes: 1

MDEV
MDEV

Reputation: 10838

For multiple replacements you need to use regex with the global (g) modifier, however + has a special meaning (the previous item 1 or more times), so it needs to be escaped.

searchValueParam = searchValueParam.replace(/\+/g,' ');

Upvotes: 3

CD..
CD..

Reputation: 74146

You need to escape the + sign:

searchValueParam.replace(/\+/g, " ");

Upvotes: 2

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