Nodejs Float Round ceilMagnitude()

Method Source Code

Number.prototype.ceilMagnitude = function(){
  if (this > 1) {
    var magnitude = Math.pow(10, (this.toString().length - 1));
    return Math.ceil(this / magnitude) * magnitude;
  } else {//  w  w  w  . jav  a 2s. com
    return 1;
  }
};

var objectLength = function objectLength(object) {
  var size = 0, key;
  for (key in object) {
    if (object.hasOwnProperty(key)) size++;
  }
  return size;
};

Related

1. roundTo(num)

   Number.prototype.roundTo = function(num) {
     var resto = this%num;
     if (resto <= (num/2)) {
       return this-resto;
     } else {
       return this+num-resto;
   };
   

2. roundToFixed(radix)

   Number.prototype.roundToFixed = function (radix) {
       var val = this;
       radix = radix || 0;
       val *= Math.pow(10, radix);
       val = Math.round(val);
       val /= Math.pow(10, radix);
       return val;
   };
   

3. roundToPrec(precision)

   Number.prototype.roundToPrec = function(precision)
       var power = Math.pow(10, precision || 0);
       return Math.round(this * power) / power;
   

4. roundToTwoDPoints()

   Number.prototype.roundToTwoDPoints = function() {
     if (isNaN(this)) {
       console.log(this);
       console.dir(this);
       throw new Error('Not a number!');
     return Math.round((this + 0.00001) * 100) / 100;
   };
   

5. ceil()

   Number.prototype.ceil = function(){
       return Math.ceil(this);
   };
   

6. floor()

   Number.prototype.floor = function(){
       return Math.floor(this);
   };
   

7. floor(scale)

   Number.prototype.floor = function (scale) {
       scale = Number(scale);
       if (isNaN(scale) || scale !== Number(scale.toFixed(0))) {
           return ;
       var ratio = Math.pow(10,scale);
       return Math.floor(this * ratio) / ratio;
   };