Nodejs Array Sum sum()

Here you can find the source of sum()

Method Source Code

/* Sum all elements of an array.
 * Use of reduce with ES6 syntax */

Array.prototype.sum = function(){
  return this.reduce((acc,x) => acc + x);
}

Related

  1. sum()
    Array.prototype.sum = function() {
      if (this.length === 0) {
        return 0;
      } else if (this.length === 1) {
        return parseInt(this[0], 10);
      } else {
        return this.reduce(function(x, y) {
          return x + y;
        });
    ...
    
  2. sum()
    Array.prototype.sum = function(){
      for(var i=0,sum=0;i<this.length;i++) {
        var val = Number(this[i]);
        if (!isNaN(val)) {
          sum += val;
      return sum;
    };
    ...
    
  3. sum()
    Array.prototype.sum = function() {
      var result = 0;
      for (var i = 0; i < this.length; i++) result += this[i];
      return result;
    
  4. sum()
    Array.prototype.sum = function(){
      var sum = 0;
      for (var i of this){
        sum += i;
      return sum;
    
  5. sum()
    Array.prototype.sum = function() {
      var sum = 0;
      for (var i = 0; i < this.length; i++) {
        if (!isNaN(Number(this[i]))) {
          sum += Number(this[i]);
      return sum;
    };
    ...
    
  6. sum()
    Array.prototype.sum = function() {
      return this.isEmpty() ? 0 : this.reduce( (a, b) => { return a + b} );
    };
    
  7. sum()
    Array.prototype.sum = function() {
      for ( var a = 0, c = this.length, b = 0; a < c; b += this[a++]) {
      return b
    };
    
  8. sum(array)
    Array.prototype.sum = function(array) { 
        return this.reduce(function(a,b) { 
            return a + b 
        }) 
    
  9. sum(begin, end)
    Array.prototype.sum = function(begin, end) {
      var total = 0;
      for (var i = begin >> 0 || 0, len = end + 1 >> 0 || this.length >> 0; i < len; i++) {
        total += +this[i] || 0;
      return total;
    };