Nodejs Number Convert toAbbr(precision)

Method Source Code

// number.js/*from ww  w.  j a  v  a  2  s.c om*/
//
// extensions to the native number type

// return an abbreviation according to order of magnitude
// ex: 10000.toAbbr();
//     > 10K
Number.prototype.toAbbr = function(precision) {
  if(this < 1000)
    return Math.round(this);
  else {
    var mag = Math.floor(Math.log(this) / Math.LN10 / 3);
    return (this / Math.pow(1000, mag)).toPrecision(precision || 3) + " KMBTP"[mag];
  }
};

Related

1. toApproximateTime()

   Number.prototype.toApproximateTime = function () {
       sec_numb    = parseInt(this);
       var approximateHours = (sec_numb / 3600).toFixedDown(1);
       var hours   = Math.floor(sec_numb / 3600);
       var minutes = Math.floor((sec_numb - (hours * 3600)) / 60);
       var seconds = sec_numb - (hours * 3600) - (minutes * 60);
     var time = '';
       if( approximateHours >= 1 ) {
         time = approximateHours + ' hours';
   ...
   

2. toBytes()

   Number.prototype.toBytes = function () {
     if (this === 0) { return '0 bytes' }
     var i = parseInt(Math.floor(Math.log(this) / Math.log(1024)))
     var r = Math.round(this / Math.pow(1024, i) * 10) / 10
     return [r, ['bytes', 'KB', 'MB', 'GB', 'TB'][i]].join(' ')
   

3. toCents()

   Number.prototype.toCents = function(){
     return this * 100;
   };
   

4. toChar()

   Number.prototype.toChar = function() {
     return String.fromCharCode(this);
   };