Nodejs Number Calculate plural(a, b, c)

Method Source Code

Number.prototype.plural = function (a, b, c)
{
   if (this % 1)//from  w  w w. java 2 s.  c om
      return b
   
   var v = Math.abs(this) % 100
   if (11 <= v && v <= 19)
      return c
   
   v = v % 10
   if (2 <= v && v <= 4)
      return b
   if (v == 1)
      return a
   
   return c
}

Related

1. ordenar()

   #!/usr/bin/env node
   Number.prototype.ordenar = function () {
     return this.toString().split('').sort(up).join('');
   };
   function up (a,b) {
     return a > b ? 1 : a < b ? -1 : 0;
   var x = 0;
   var done= false;
   ...
   

2. ordinal()

   Number.prototype.ordinal = function () {
       return this + (
           (this % 10 == 1 && this % 100 != 11) ? 'st' :
           (this % 10 == 2 && this % 100 != 12) ? 'nd' :
           (this % 10 == 3 && this % 100 != 13) ? 'rd' : 'th'
           );
   var ResetInput = function(){
       jQuery('input, textarea').each(function() {
   ...
   

3. ordinalize()

   Number.prototype.ordinalize = function() {
       var abs = Math.abs(this);
       if (abs % 100 >= 11 && abs % 100 <= 13) {
           return this + 'th';
       abs = abs % 10;
       if (abs === 1) { return this + 'st'; }
       if (abs === 2) { return this + 'nd'; }
       if (abs === 3) { return this + 'rd'; }
   ...
   

4. parseNumber(x)

   function parseNumber(x){
     if(!isNaN(x)) return x;
     return parseFloat(x.substring(1, x.length - 1));
   

5. percentage(val)

   Number.prototype.percentage = function(val){
     return this * (val/100);
   };
   

6. pluralA(ary)

   Number.prototype.pluralA = function (ary)
     return this.plural(ary[0], ary[1], ary[2])
   

7. popCount()

   Number.prototype.popCount = function() {
     var v = this.valueOf();
     v = v - ((v >> 1) & 0x55555555);                
     v = (v & 0x33333333) + ((v >> 2) & 0x33333333); 
     return ((v + (v >> 4) & 0xF0F0F0F) * 0x1010101) >> 24;
   };
   

8. powerOf(power)

   Number.prototype.powerOf = function(power) {
     return Math.pow(this, power);
   };
   

9. randStr()

   Number.prototype.randStr = function() {
       var alpha = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
       var res = '';
       for(var i = 0; i < this; i++) {
           res += alpha[Math.floor(Math.random() * alpha.length)];
       return res;