替换，正则表达式，JavaScript

Question

Got this string:

'test',$, #207

I need to remove spaces which have a commma before

So the result will be: 'test',$,#207

Tried this:

  replace(/\/s,]/g, ',')

Not working. Any ideas?

Answer 1

由于您的模式很简单，因此只需执行.split(', ').join(',')

Answer 2

To replace only spaces and not other whitespaces use the following regex.

Regex : /, +/g

Explanation :

, will search for comma.

+ will search for multiple spaces.

And then replace by , using replace(/, +/g, ',')

Regex101 Demo

JSFiddle demo

Answer 3

replace(new RegExp(find, ', '), ',');

Answer 4

I need to remove spaces which have a commma afterwards

No, your example says the opposite. That is, you want to remove spaces that have a comma before them.

In either case, the error in your expression is the "]".

replace(/\/s,/g, ',')

Does what you say you want to do, and

replace(/,\/s/g, ',')

Does what the example says.

The other answer is right, though - just use replace(' ,', '') ; you need no regex here.

Answer 5

I think you meant comma that have whitespace afterwards:

stringVar = "'test',$, #207";
replace('/\,\s/g', stringVar);

\\, means , literally and \\s means whitespace.

You can test javascript regex and know a little more about the modifiers and stuff at regex101 .

Answer 6

For all whitespaces which have a "," before

var str = "test,$, #207,  th,     rtt878";
console.log(str.replace(/\,\s+/g,","));
var str = "test,$, #207";
console.log(str.replace(/\,\s+/g,","));