Dec 9, 2008 · It will add a new element at the end of the array. But if you intend to add multiple elements then store the elements in a new array and concat the second array with the first array...either way you wish. arr=['a','b','c']; arr.push('d'); //now print the array in console.log and it will contain 'a','b','c','d' as elements. console.log(array);

If you want to modify the original array instead of returning a new array, use .push()... array1.push.apply(array1, array2); array1.push.apply(array1, array3); I used .apply to push the individual members of arrays 2 and 3 at once.

Feb 25, 2009 · I am looking for a JavaScript array insert method, in the style of: arr.insert(index, item) Preferably in jQuery, but any JavaScript implementation will do at this point.

Actually, all unshift/push and shift/pop mutate the source array. The unshift/push add an item to the existed array from begin/end and shift/pop remove an item from the beginning/end of an array. But there are few ways to add items to an array without a mutation. the result is a new array, to add to the end of array use below code:

Sep 19, 2013 · It more clearly delineates the boundaries between operating on the javascript objects and the JSON text representation of those objects. I think it is essential in understanding that once the JSON has been parsed, we are operating on pure javascript objects -- the fact that they originally came from JSON is irrelevant.

The old school way of adding all values of an array into the Set is: // for the sake of this example imagine this set was created somewhere else // and I cannot construct a new one out of an array...

Oct 8, 2013 · Sounds like your array elements are Strings, try to convert them to Number when adding: var total = 0; for (var i=0; i<10; i++){ total += +myArray[i]; } Note that I use the unary plus operator ( +myArray[i] ), this is one common way to make sure you are adding up numbers, not concatenating strings.

Jan 9, 2013 · Your element is not an array, however your cart needs to be an array in order to support many element objects. Code example: var element = {}, cart = []; element.id = id; element.quantity = quantity; cart.push(element); If you want cart to be an array of objects in the form { element: { id: 10, quantity: 1} } then perform:

Jan 4, 2010 · Using .push() is the better way to add to an array, since you don't need to know how many items are already there, and you can add many items in one function call. Share Improve this answer

@icCube: I just ran a benchmark, comparing this method to that in patrick's answer. It starts with a1 and a2 as in the example, and injects the a2 variable into a1 10,000 times (so that in the end, you have an array with 20,005 elements).