Numbers with commas in Javascript

Question

I have a javascript function that accepts a number and performs a mathematical operation on the number. However, the number I\'m passing in could have a comma in it, and fr

Answer 1

Just replace all the commas with a blank.

You can follow this: http://blog.techsaints.com/2007/06/25/javascript-how-to-remove-all-commas-from-a-number/

Answer 2

Converts comma delimited number string into a type number (aka type casting)

+"1,234".split(',').join('') // outputs 1234

Breakdown:

+             - math operation which casts the type of the outcome into type Number
"1,234"       - Our string, which represents a comma delimited number
.split(',')   - split the string into an Array: ["1", "234"], between every "," character
.join('')     - joins the Array back, without any delimiter: "1234"

And a simple function would be:

function stringToNumber(s){
  return +s.split(',').join('');
}

Answer 3

A quick and dirty way is to use the String.replace() method:

var rawstring = '1,200,000';
var cleanstring = rawstring.replace(/[^\d\.\-\ ]/g, '');

This will set cleanstring to: 1200000. Assuming you are using US formatting, then the following conversions will occur:

1234 --> 1234
1,234 --> 1234
-1234 --> -1234
-1,234 --> -1234
1234.5 --> 1234.5
1,234.5 --> 1234.5
-1,234.5 --> -1234.5
1xxx234 --> 1234

If you are in other locales that invert the '.' and ',', then you'll have to make that change in the regex.

Answer 4

You can set up your textbox to have an onblur() function so when the user attempts to leave the textbox, you then remove the commas from the value by using the javascript replace function

example:

  function checkNumeric(objName)
  {
    var lstLetters = objName;

    var lstReplace = lstLetters.replace(/\,/g,'');
  }  

With input tag here:

<input type="text" onblur="checkNumeric(this);" name="nocomma" size="10" maxlength="10"/>