How to convert Persian and Arabic numbers inside a string to English using JavaScript?

Question

How can I convert Persian/Arabic numbers to English numbers with a simple function?

arabicNumbers = [\"١\", \"٢\", \"٣\", \"٤\", \"٥\", \"٦\", \"٧\", \"٨\",          


        

Answer 1

Use this simple function to convert your string

var
persianNumbers = [/۰/g, /۱/g, /۲/g, /۳/g, /۴/g, /۵/g, /۶/g, /۷/g, /۸/g, /۹/g],
arabicNumbers  = [/٠/g, /١/g, /٢/g, /٣/g, /٤/g, /٥/g, /٦/g, /٧/g, /٨/g, /٩/g],
fixNumbers = function (str)
{
  if(typeof str === 'string')
  {
    for(var i=0; i<10; i++)
    {
      str = str.replace(persianNumbers[i], i).replace(arabicNumbers[i], i);
    }
  }
  return str;
};

Be careful, in this code the persian numbers codepage are different with the arabian numbers.

Example

var mystr = 'Sample text ۱۱۱۵۱ and ٢٨٢٢';
mystr = fixNumbers(mystr);

Refrence

Answer 2

You could do something like this that uses the index of the number within the string to do the conversion:

// Returns -1 if `fromNum` is not a numeric character
function convertNumber(fromNum) {
    var persianNums = '۰١۲۳۴۵۶۷۸۹';
    return persianNums.indexOf(fromNum);
}

var testNum = '۴';
alert("number is: " + convertNumber(testNum));

Or map using a object like this:

// Returns -1 if `fromNum` is not a numeric character
function convertNumber(fromNum) {
    var result;
    var arabicMap = {
        '٩': 9,
        '٨': 8,
        '٧': 7,
        '٦': 6,
        '٥': 5,
        '٤': 4,
        '٣': 3,
        '٢': 2,
        '١': 1,
        '٠': 0
    };
    result = arabicMap[fromNum];
    if (result === undefined) {
        result = -1;
    }
    return result;
}

var testNum = '٤';
alert("number is: " + convertNumber(testNum));

Answer 3

best way to do that return index of number in array:

String.prototype.toEnglishDigits = function () {
    return this.replace(/[۰-۹]/g, function (chr) {
        var persian = ['۰', '۱', '۲', '۳', '۴', '۵', '۶', '۷', '۸', '۹'];
        return persian.indexOf(chr);
    });
};

Answer 4

Short and easy!

"۰۱۲۳۴۵۶۷۸۹".replace(/([۰-۹])/g, function(token) { return String.fromCharCode(token.charCodeAt(0) - 1728); });

Or in a more modern manner

"۰۱۲۳۴۵۶۷۸۹".replace(/([۰-۹])/g, token => String.fromCharCode(token.charCodeAt(0) - 1728));

Answer 5

function toEnglishDigits(str) {
  const persianNumbers = ["۱", "۲", "۳", "۴", "۵", "۶", "۷", "۸", "۹", "۰"]
  const arabicNumbers = ["١", "٢", "٣", "٤", "٥", "٦", "٧", "٨", "٩", "٠"]
  const englishNumbers = ["1", "2", "3", "4", "5", "6", "7", "8", "9", "0"]
  
  return str.split("").map(c => englishNumbers[persianNumbers.indexOf(c)] ||
      englishNumbers[arabicNumbers.indexOf(c)] || c).join("")
}

toEnglishDigits("۶٦۵any٥32") // "665any532"

Answer 6

If the string may contain both "Arabic" and "Persian" numbers then a one-line "replace" can do the jo as follows.

The Arabic and Persian numbers are converted to English equivalents. Other text remains unchanged.

Num= "۳٣۶٦۵any٥۵٤۶32٠۰";     // Output should be "33665any55453200"

Num = Num.replace(/[٠-٩]/g, d => "٠١٢٣٤٥٦٧٨٩".indexOf(d)).replace(/[۰-۹]/g, d => "۰۱۲۳۴۵۶۷۸۹".indexOf(d));

console.log(Num);