Javascript Array sum()

Array.prototype.sum = function() {
  if(Array.isArray(this[0])){
    var sumMatrix = null;
    this.forEach(function(col){

      if(sumMatrix){
        sumMatrix = sumMatrix.plus(col);
      }else{//from   w w  w .  ja v  a  2 s. com
        sumMatrix = col;
      }
    });
    return sumMatrix;
  }else{
    var sum = 0;
    this.forEach(function(k) {
      sum += k;
    });
    return sum;
  }
};

Array.prototype.sum = function () {
  var sum = 0;//from w ww  . j  a va2s  . c om

  for (var i = 0; i < this.length; i++) {
    sum += this[i];
  };

  return sum;
}

console.log([1, 3, 12, 33, 2].sum());

var ary1 = new Array(12, 55, 43, 32, 44);
var ary2 = new Array(12, 33, 1);
Array.prototype.sum = function() {
    var output = 0;
    for (var i = 0; i < this.length; i++) {
        output += this[i];//from ww  w  .  jav  a 2 s  . c o  m
    }
    return output;
};

const assert = require('assert')

Array.prototype.sum = function() {
  return this.reduce((sum, el) => sum + el, 0)
}

assert.equal([].sum(), 0)/*from w  w w.j  a va 2  s . c  om*/
assert.equal([2, 5, 7].sum(), 14)

var things = [2,3,5];

Array.prototype.sum = function () {
  var sum = 0;/*from   www.  j av a 2 s. c  om*/
  this.forEach(function (e) {
    sum += e;
  });
  return sum;
}

console.log(things.sum());

/**// www  .j a v  a  2s. com
 * 
 */
Array.prototype.sum = function () {
    var sum = 0;
    for (i = 0; i < this.length; i++) {
      sum += this[i]
   }
   return sum 
}

Array.prototype.sum = function() {
  return this.reduce(function(prev, curr) {
    return prev + curr;
  });//w  w w  .j av  a  2s .  c o  m
};

module.exports = Array.prototype.sum;

Array.prototype.sum = function () {
    var length = this.length;
    var total = 0;
    for (var i = 0; i < length; i++) {
  total += this[i];//from  ww w.j a  va2  s.com
    }
    return total;
};

Array.prototype.sum = function() {
  return this.reduce(function(a,b){return a+b;});
};

Array.prototype.sum = function () {
  let s = 0;//from   www .j  a v  a  2  s . c  o m
  for (let i = 0; i < this.length; i++) {
    s += this[i];
  }
  return s;
};

Array.prototype.sum = function() {
  let total = 0/*from  w  w w.  ja v  a 2s  . c  om*/
  for (let i = 0; i<this.length; i++) {
    total += this[i]
  }
  return total;
}

let a = [1, 2, 3, 4]
console.log(a.sum())

Array.prototype.sum=function(){
  var suma;/*w  w w. j a  v a 2 s  . c o  m*/
  for(var i=0;i<this.lenght;i++){
    suma=suma+this[i];
  }
  return suma;
}

//adding a method to arrays to sum their number elements
Array.prototype.sum = function(){
  var sum = 0;/*  w ww . ja  va 2s.c o  m*/
  for(var index in this){
    if(typeof this[index] === "number"){
      sum += this[index];
    }
  }
  return sum;
}

var numbers = [1,2,3,4,5];
console.log(numbers.sum());
//logs 15

var ary1 = new Array(12, 55, 43, 32, 44);
var ary2 = new Array(12, 33, 1);
Array.prototype.sum = function() {
    var output = 0;
    for (var i = 0; i < this.length; i++) {
        output += this[i];/*from  w  w  w  .  j a  v a2  s  .  c  o  m*/
    }
    return output;
};
console.log(ary1.sum());
console.log(ary2.sum());

var ary1 = new Array(12, 55, 43, 32, 44);
var ary2 = new Array(12, 33, 1);
Array.prototype.sum = function() {
    var output = 0;
    for (var i = 0; i < this.length; i++) {
        output += this[i];/*from   w  w w . j  av a 2s  .c om*/
    }
    return output;
};
ary1.sum = function() {
    return "nothing";
};
console.log(ary1.sum());
console.log(ary2.sum());

/* no sabia cual era la idea, asi que lo implemente asi:
* sum es una funcion que suma los elementos del array.
*///w w w.jav a  2  s . co  m
Array.prototype.sum = function() {
  return this.reduce((result, element) => result + element, 0);
};

Array.prototype.sum = function () {
  return this.reduce(function(sum, val) {
    return sum + val;
  });//  w w w.  ja v  a 2 s .c  om
};

Array.range = function(start, count) {
  var arr = [];
      val = start;
  while (count > 0) {
    arr.push(val);
    count--;
    val++;
  }
  return arr;
};

console.log([0, 1, 2].sum());
console.log(Array.range(0, 3));

Array.prototype.sum = function () {
    var len = this.length;
    if (len == 0)
        return 0;
    for (var sum = 0, i = 0; i < len; i++) {
        sum += this[i];/*  w w  w .  j av a2s.  c  o m*/
    }
    return sum;
};

// var arr = [1,2,3,4];
// arr.sum();  //returns 10

// var arr = [10, 28, 14, 33];
// arr.sum(); //returns 85

Array.prototype.sum = function() {
  // var total = 0;
  // for (var i = 0; i < this.length; i++) {
  //   total += this[i];
  // }//w w w  . j a va 2 s.com
  // return total;
  // also can use .reduce
  arr.reduce(function(initial, current) {
    return initial + current;
  })
}

Array.range = function(start, count){
  var arr = [],//from  w w  w. ja  v  a 2 s. c  om
    val = start;
  while (count > 0) {
    arr.push(val);
    count--;
    val++;
  }
  return arr;
};

console.log(Array.range(0, 3));
// Array.range(start, count)


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

console.log([1,2,3].sum);

var range = function (start, end) {
  if (start === end) {
    return [start];
  } else {/*from w ww.j  a  va 2  s .co  m*/
    return [start].concat(range(start + 1, end));
  }
}

// console.log(range(2, 7));
Array.prototype.sum = function () {
  if (this.count === 0) {
    return 0;
  } else {
    return this[0] + this.slice(1, -1).sum();
  }
}

duh = [1, 2, 3, 4, 5];
console.log(duh.sum());

var numbers = [1,2,3,4,5,6];


Array.prototype.sum = function(){
  return this.reduce(function(p, c){
    return p+c;//from w  w  w  . j a va2s. c  o  m
  })
  //return eval(numbers.join("+"));
}

var result = numbers.sum();

console.log(result);
console.log(numbers);

// extending array with sum and max methods

Array.prototype.sum = function(){
 for(var i=0,sum=0;i<this.length;sum+=this[i++]);
 return sum;/*from  w w w  . ja  va  2s.c  om*/
}

Array.prototype.sum = function() {
    return this.reduce(function(a, b) {return a + b;}, 0);
};

'use strict';//from   w  ww.  ja v  a 2s. c  om

Array.prototype.sum = function () {
    var total = 0;
    var i = this.length;

    while (i--) {
        total += this[i];
    }

    return total;
};

module.exports = function (arr) {
    return arr.sum() / arr.length;
};

Array.prototype.sum = function () {
    var total = 0;
    var i = this.length;

    while (i--) {
        total += this[i];//from   w w  w.j  a  v a  2 s.  c  o  m
    }

    return total;
}

Array.prototype.sum = function() {
 var i;/*from w  w  w  . ja v a  2s  . c  o m*/
 var s:Number = 0;
 for (i=0; i < this.length; i++) {
  s += Number(this[i]);
 }
 return s;
}

var test = new Array(1, 2, 3);

console.print("Sum of Array(1, 2, 3) == 6: " + (test.sum() == 6));

function range(a, b) {
    return [...Array(b-a).keys()].map(x => x + a);
}

Array.prototype.sum = function() {
    return this.reduce((a, b) => a + b, 0);
}

module.exports = function(n) {
    var sumOfSquares = range(1,101).map(x => x*x).sum();
    var squareOfSum = Math.pow(range(1,101).sum(), 2);
    return squareOfSum - sumOfSquares;
};

/**//from   w  ww. j  a  va2 s.c o  m
@Name: Array.prototype.sum
@Author: Paul Visco
@Version: 1.1 11/19/07
@Description: Add up the values in an array

@Return: Number Returns the sum of all the values in an array
@Example:
var myArray = [5, 5, 10, 15];
var answer = myArray.sum();
//answer =35;
*/
Array.prototype.sum = function(){
 var val = 0;
 this.forEach(function(v){
  val +=v;
 });
 return val;
};

Array.prototype.sum = function () {
  return this.reduce(function(sum, val){ 
    return sum + val
  })/*from w w  w . j av a 2  s  .co  m*/
}

console.log([1, 2, 3, 4].sum());


Array.range  = function(start, count) {
  var arr = [],
      val = start;
  while(count > 0) {
    arr.push(val);
    count--;
    val++;
  }
  return arr;
}

console.log(Array.range(-1,4).sum());

Array.prototype.sum = function() {
  total = 0;/*from www .  j a  v a2  s  .  c o  m*/
  for (var i=0;i < this.length;i++) {
    total += this[i];
  }

  return total;
};

Array.prototype.sum = function()
{
    var sum = 0;//from   ww  w .  j  av a  2s .  co  m
    for(var i = this.length; -- i >= 0 ;)
    {
        sum += (this[i] === null || this[i] === undefined) ? 0 : this[i];
    }

    return sum;
}

Array.prototype.sum = function(){
  return this.reduce((a,b)=>a+b,0);
}

Array.prototype.sum = function(){
  return this.reduce(function(a, b){
    return a + b;
  });/*from   www .j  av a 2  s .  c o  m*/
};

Array.prototype.sum = function() {
  var i = 0;//from  w  ww .  j  ava2s  .  com
  return this.reduce(function (prev, current) {
    console.log(i+':', prev, current);
    i ++;
    return prev + current;
  });
};

var numbers = [1, 2, 3, 4, 5, 6];
var result = numbers.sum();
console.log(result);

String.prototype.capitalize = function() {
  return this.charAt(0).toUpperCase() + this.substring(1);
};

var hello = 'hello world';
console.log(hello.capitalize());

Array.prototype.sum = function () {
  return this.reduce((a, b) => a + b, 0);
};

Array.prototype.sum = function() {
  return this.reduce(function(a, b) {
    return a + b;
  });/*from w w w  .  j  a  va2s  . c o m*/
}

Array.prototype.sum = function () {
  return this.reduce((sum, n) => sum + Number(n), 0)
}

Array.prototype.sum = function(){
  var sum = 0;// w  ww  .j ava  2 s  .  c om
  this.forEach(function(elem){
    sum += elem;
  });
  return sum;
};

Array.prototype.sum = function(){
 for (var i = 0, sum = 0 ; i != this.length; ++i) {
  var n = this[i];
  if(!isNaN(n)) {
   sum += n*1;//w w w .j av a  2 s . c om
  }
 }
 return sum;
};

/* Your job is to add a method 'sum' to all array objects, which sums all the
numbers in it. You should return 0 if the array is empty.

For example://from  w ww. j  a  v a2  s  .  c  om
var arr = [1,2,3,4];
arr.sum();  //returns 10 */


Array.prototype.sum = function() {
 var sum = 0;

 for (var i = 0; i < this.length; i++) {
   sum += this[i];
   }
 return sum;
}

// alternatively:

Array.prototype.sum = function() {
  return this.reduce((a, b) => a + b, 0);
};

Array.prototype.sum = function () {
  return this.reduce(function (total, aValue) {
    return total + Number(aValue);
  });/* ww w.  ja v  a2s . c  o m*/
};

// Add custom function to Array prototype
Array.prototype.sum = function () {
 var sum,//from   w  ww . java 2s  .co  m
  i;

 sum = 0;
 for (var i = 0; i < this.length; i++) {
  sum += this[i];
 };

 return sum;
}

console.log([1, 3, 12, 33, 2].sum());

Array.prototype.sum = function () {
 var sum,//  w  ww . j  av a 2 s .  c om
  i;

 sum = 0;
 for (var i = 0; i < this.length; i++) {
  sum += this[i];
 };

 return sum;
}

console.log([1, 3, 12, 33, 2].sum());

Array.prototype.sum = function() {
var result = 0;/*w ww  .j a va  2s .co  m*/
for (var i=0; i<this.length; i++) {
  result += this[i];
}
  return result;
}

var arr = [1,2,3,4];
arr.sum();  //returns 10

var arr = [10, 28, 14, 33];
arr.sum(); //returns 85




//Your code goes here
Array.prototype.sum = function() {
  if (this.length === 0) { return 0; }
  return this.reduce( function(p, c) { return p + c; });
}


var arr = [1,2,3,4];
console.log(arr.sum());  //returns 10

var arr = [10, 28, 14, 33];
console.log(arr.sum()); //returns 85

Array.prototype.sum = function () { 
  return this.reduce(function(a, b) { 
    return a + b; 
  }, 0); //from www .j  a  va2 s  .c om
}

Array.prototype.sum = function(){
  var sum = 0;//from  w  w w . j  a v  a2  s.  co  m
  this.forEach(function(x){
    sum += x;
  });
  return sum;
};

Array.prototype.sum = function() { return this.reduce(function(a, b){ return a + b },0) };

var argv = process.argv; 
var numbers = argv.slice(2);

Array.prototype.sum = function() {
 for(var i = 0, s = 0; i < this.length; i++){
  s = s + Number(this[i]);  //  w ww.java2 s.  c  om
 }
 return s; 
}

Array.prototype.sum = function() {
 var s = 0; 
 this.forEach(function(n){
  s = s + Number(n);
 })
 return s; 
}

var result = numbers.sum(); 
console.log(result); 

// was officially solved by 
// result = 0 
// for (var i = 2; i < process.argv.length; i++)
//  result += Number(process.argv[i])
// console.log(result) 
// the syntax looking so effortless

Array.prototype.sum = function(){
  'use strict';/*from   w ww. j a v a  2  s.c o m*/
  var count = 0;
  this.forEach(function(item){
    count += parseFloat(item) || 0;
  });
  return count;
};

Array.prototype.sum = function() {
  var result = 0,
      i;/*www. j av  a  2 s.com*/
  for(i = 0; i < this.length; result += this[i++])/* empty */; 

  return result;
 };

Array.prototype.sum = function() {
    return this.length?this.reduce(function(e,b){return e+b}):0;
}

Array.prototype.sum=function(){
    let sum = 0;//from ww w .  j av a2  s  . c  om
    for (let el of this){
        sum+=Number(el);
    }
    return sum;
}

Array.prototype.sum = function () {
  return this.reduce(function(a, b) {
    return a + b;
  });/*from ww w .ja v a2s.c om*/
};

console.log([1, 2, 3].sum());

Array.prototype.sum = function () {
  return (!this.length) ? 0 : this.reduce((acc, value) => {
    return acc + value;
  });//from  www  .ja  v  a  2s. co m
};

Array.prototype.sum = function() {
  if (this.length === 0) {
    return NaN;
  }//ww w. ja va 2  s . co m
  return this.reduce(function(a, b) {
    return a + b;
  }, 0);
}

Array.prototype.sum = function() {
    var sum = 0;//from   w  w w .ja  v  a 2s  .  c  o m
    for(var i = 0; i < this.length; i++) sum += this[i];
    return sum;
}

Array.prototype.sum = function () {

  var i = 0;//from   w w w  .  j  a  va  2 s .  co  m
  var total = 0;

  for (i = 0; i < this.length; i += 1) {
    total += parseInt(this[i], 0);
  }

  return total;
};

Array.prototype.sum = function(){
 return this.reduce(function(p,n){
  return p + n;// w w w  . j  a  va 2s.  c o  m
 }, 0);
};

Array.prototype.sum = function (){
  var result = new Number();
  this.forEach(function(v){
    result += v;/* w w  w . j  a va  2 s . c  om*/
  });
  return result;
};

Array.prototype.sum = function () {
    return this.reduce(function(previousValue, currentValue) {
        return previousValue + currentValue;
    });/*from ww w  .  j  av  a 2  s  . c  o m*/
};

Array.prototype.sum = function(){
  return this.reduce(function(sum, element){
    return sum += element;
  }, 0);//from   www .  j  a v a 2 s  .c  o  m
};