push items into array and return them in javascript

Question

I am trying to take an array of numbers and log what numbers are modulus 2 with a remainder of 0 i % 2 === 0. For the numbers that are modulus 2 with a remainder of 1 i % 2 === 1, I want to push those numbers to an array (seemed like the best fit to log a set of numbers).

From there I would return the sumTotal of the numbers that are %2 === 0 and print which numbers in the array were %2 === 1.

The problem below works for the if statement but when I added in my else if I am having trouble figuring out how to push items into the array in the else if statement.

var numSet = [1, 4, 6, 450, 5, 222, 397, 962, 678, 222, 459];

var myFunc = function (num) {
    var total = 0;
    var total2 = [];
    for (var i = 0; i < num.length; i += 1) {
        if (num[i] % 2 === 0) {
            total += num[i];
        } else if (num[i] % 2 === 1) {
            total2[num[i]] = num[i].push;
       console.log(total2);
        }   
    } 
    return 'The total is ' + total + ' and the remainder is ' + total2;
};

@tymeJV that worked, thanks. How would I add in a space between each number when it runs the return statement? as now each number has a comma but no space so its not as clean to read? — jstone
– jstone, Commented Dec 29, 2013 at 3:29

thefourtheye · Accepted Answer · 2013-12-29 03:24:55Z

2

The problem with your code is that, you can push the new values into total2 like this

total2.push(num[i]);

But you can use Array.filter and Array.reduce, like this

var numSet = [1, 4, 6, 450, 5, 222, 397, 962, 678, 222, 459];

var oddNumbers = numSet.filter(function(currentNumber) {
    return currentNumber % 2 === 1;
});

var total = numSet.reduce(function (total, currentNumber) {
    if (currentNumber % 2 === 0) {
        total += currentNumber;
    }
    return total;
}, 0);

console.log(total, oddNumbers);

Output

2544 [ 1, 5, 397, 459 ]

edited Dec 29, 2013 at 3:24

answered Dec 29, 2013 at 3:17

thefourtheye

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4 Comments

Steven Lambert Over a year ago

It should be noted that Array.filter and Array.reduce do not work in IE8 and below. I also believe he wanted the array to contain the odd numbers and the total of the even numbers.

jstone Over a year ago

why cant I push the way @tymeJV said? I tried it and it worked. Guessing something bigger may be going on that I am missing.

thefourtheye Over a year ago

@jstone That was my first suggestion too... :)

jstone Over a year ago

Ah gotcha now. Thanks for the clarification.

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