Dec 9, 2008 · How do I append an object (such as a string or number) to an array in JavaScript?

So, we are going to push an object (maybe empty object) into that array. myArray.push({}), or myArray.push({""}). This will push an empty object into myArray which will have an index …

This does not create a "normal" JavaScript object literal (aka map, aka hash, aka dictionary). It is however creating the structure that OP asked for (and which is illustrated in the other question …

He wants to push to existing array so Array.prototype.push.apply(arr1, arr2) is the correct answer, because using arr1.concat(arr2) you are creating a new array.

1 Mozilla actually shows you how to handle objects with push by chaining push to the call method: "push is intentionally generic, and we can use that to our advantage. Array.prototype.push can …

Jan 1, 2010 · For an array of strings (but not an array of objects), you can check if an item exists by calling .indexOf() and if it doesn't then just push the item into the array:

Jul 5, 2012 · You have some errors in your code: Use myArray[i].push( 0 ); to add a new column. Your code (myArray[i][j].push(0);) would work in a 3-dimensional array as it tries to add …

Here is my object literal: var obj = {key1: value1, key2: value2}; How can I add field key3 with value3 to the object?

Apr 19, 2016 · Array.push () and unique items Asked 9 years, 8 months ago Modified 1 year, 7 months ago Viewed 252k times

Dec 26, 2025 · I just completed section1, and noticed that there isn't a method covered on how to push an item to the a specific location of the array. For example, if I wanted the array to show …