Nodejs Number Calculate hasDiv( n )

Method Source Code

Number.prototype.hasDiv = function( n ) {
  return Number.isInteger( this / n )
}

function sum( ary ) {
  var out = 0//from www . jav  a2 s  .co m
  for (var n in ary)  {
    out += ary[n]
  }
  return out
}
function divisors( n ) {
  out = []
  for ( var i = 1; i < n; i++ ) {
    if ( n.hasDiv( i ) ) {
      out.push( i )
    }
  }
  return out
}

function isPerfectN( n ) {
  if (sum(divisors( n)) == n) {
    return true
  }
  else {
    return false
  }
}

function perfectsUnder( n ) {
  ary = [ 1 ]
  for( var i = 1; i < n; i++ ) {
    if ( isPerfectN( i ) ) {
      ary.push( i )
    }
  }
  return ary
}

Related

1. getHisByMs()

   Number.prototype.getHisByMs=function(){
       var ms=this;
       var date=new Date(ms);
       var his=[];
       his.push(Number(date.getHours()).addZero());
       his.push(Number(date.getMinutes()).addZero());
       his.push(Number(date.getSeconds()).addZero());
       return his;
   

2. getPrecisiongetPrecision(length)

   Number.prototype.getPrecision = function getPrecision(length) {
       var value = parseFloat(this);
       if (Number.isFloat(value)) {
           return value.toString().split(".")[1].length;
       return 0;
   };
   

3. getValue(arguments)

   var BigNumber = function(n){
     this.value = n.toString();
     this.getValue = function(){
       return this.value;
     this.getRealValue = function(){
       return Number(this.value);
     this.add = function(bnum){
   ...
   

4. greaterThan(num)

   Number.prototype.greaterThan = function(num) {
       return this > num;
   

5. gt(right) return this > right };

   Number.prototype.gt = function(right) { return this > right };
   Number.prototype.ge = function(right) { return this >= right };
   Number.prototype.lt = function(right) { return this < right };
   Number.prototype.le = function(right) { return this <= right };
   Number.prototype.eq = function(right) { return this == right };
   Number.prototype.ne = function(right) { return this != right };
   

6. hasMult( n )

   Number.prototype.hasMult = function( n ) {
     return Number.isInteger( this / n )
   function fun100() {
     out = []
     for ( var i = 1; i <= 100; i++ ) {
       if ( i.hasMult(3) ) {
         out.push['Fizz']
       else if ( i.hasMult(5) ) {
         out.push['Buzz']
       else if ( i.hasMult(5) && i.hasMolt(3) ) {
         out.push["Fizzbuzz"]
       else {
         out.push( i.toString() )
     return out
   

7. int()

   var num = 5;
   Number.prototype.int = function(){ 
         return parseInt(this) ;
   Number.prototype.float = function(){ 
         return this.toFixed(2);
   console.log(num.float());
   console.log(num);
   ...
   

8. intToHSL()

   Number.prototype.intToHSL = function() {
       var shortened = this % 360;
       return "hsl(" + shortened + ",45%,56%)";
   };
   

9. max(maximum)

   Number.prototype.max = function(maximum) {
       if (this.valueOf() > maximum){
         return maximum;
       } else {
         return this.valueOf();
   };