Removing multiple characters from string and spaces

Question

Hey guys I'm trying to remove two characters and any white space from a string that looks like this.

var num1 = "34 345 324.34 $"
var num2 = "$34,345,324.34"

I basically want to remove $ and , and white space

so far I have this

num1.replace(/,|\s/g,""); //34345324.34$
num2.replace(/,|\s/g,""); //$34345324.34

How do I also delete the $

Thank you.

Answer 1

For white space in the beginning of the string (or the end) use str.trim(); , it will strip any trailing whitespaces from the beginning and/or the end of the string that contains them.

Answer 2

You seem to be dealing with currency strings. You may follow your blacklist approach and use .replace(/[,\\s$]+/g,"") to remove all occurrences of 1+ commas, whitespaces and dollar symbols. However, once you have a pound, euro, yen, etc. currency symbol, you will have to update the regex.

Using a whitelisting approach is easier, remove all chars that are not on your whitelist, digits and dots:

.replace(/[^0-9.]+/g,"")

See the regex demo .

The [^0-9.]+ matches 1 or more occurrences of any chars other than (the [^...] is a negated character class that matches the inverse character ranges/sets) digits and a dot.

JS demo:

 var nums = ["34 345 324.34 $", "$34,345,324.34"]; var rx = /[^0-9.]+/g; for (var s of nums) { console.log(s, "=>", s.replace(rx, "")); } 

Answer 3

To remove all dots , spaces and dollars , add the dollar sign (escaped) into your regex:

/,|\s|\$/g

or simply

/[,\s\$]/g

Demo:

 var num1 = "34 345 324.34 $" var num2 = "$34,345,324.34" var res1 = num1.replace(/[,\\s\\$]/g,""); //34345324.34 var res2 = num2.replace(/[,\\s\\$]/g,""); //34345324.34 console.log(res1) console.log(res2)