Nodejs Number Sign sign(x)

Method Source Code

Math.sign = function(x) {
  if (x > 0) {
    return 1/*from   w w  w  .ja v  a 2s . c  om*/
  } else if (x < 0) {
    return -1
  } else {
    return 0
  }
}

Related

1. sign()

   Math.sign = function(x) {
     if (x > 0) {
       return 1
     } else if (x < 0) {
       return -1
     } else {
       return 0
   

2. sign(d)

   Math.prototype.sign = function(d) {
     return d<0 ? -1 : 1;
   };
   

3. sign(x)

   Math.sign = function(x) {
     x = +x;
     if (x === 0 || isNaN(x))
       return x;
     return x > 0 ? 1 : -1;
   

4. sign(x)

   Math.sign = Math.sign || function (x) {
       return x === 0 ? 0 : x / Math.abs(x);
   };
   

5. sign()

   Number.prototype.sign = function() {
     if(this > 0) {
       return 1;
     } else if (this < 0) {
       return -1;
     } else {
       return 0;
   

6. sign()

   Number.prototype.sign = function() {
       return (this>0) - (this<0);
   };
   

7. signed()

   'use strict';
   Number.prototype.signed = function () {
       return this & 0x80 ? -((0xff & ~this) + 1) : this;
   };