I've read a few tutorials on this, and I still can't quite get my head around it.

By using our site, you acknowledge that you have read and understand our Stack Overflow for Teams is a private, secure spot for you and Now, I need each to work with each key, but I struggle getting those through a foreach() loop, because there is no values. Because an array is also an object, it can have both types of keys, but using a string key is not an array access, it's accessing a property of the object.An array of objects is a very practical data structure in javascript and is used quite often when either order or index by numeric index is important.If order is not important or you don't need to access by numeric index and just want to access by an alpha numeric string, then you should just use an object and set a properties on it with keys that are your alphanumeric string.Thanks for contributing an answer to Stack Overflow! By using our site, you acknowledge that you have read and understand our We demonstrate with the following multidimensional array: We need to put some arrays inside an array, then the total thing is working like a multidimensional array.

The Overflow Blog Finally I'm getting how to handle object in JS!Can't upvote this answer enough! your coworkers to find and share information. Sorry, we no longer support Internet Explorer ... Browse other questions tagged javascript multidimensional-array associative-array or ask your own question.

Is there a way I can assign the keys as the values as well, to have a structure like this? Thanks. The array, in which the other arrays are going to insert, that array is use as the multidimensional array in our code.

The example lines (taken form Matt example) you have to initialize the sub-object first, as I mentioned in my answer. can use the function regex.test(string) and the array.map function on the keys to pull out exactly what you want. In JavaScript, you can't use array literal syntax or the array constructor to initialize an array with elements having string keys. Like obj[0] which results in apples:1, oranges:2 . Should I create an Array and fill it will Objects? You have to remember to initialize them first as well.If you're looking over values, you might have something that looks like this:As I needed get all elements in a nice way I encountered this SO subject "Traversing 2 dimensional associative array/object" - no matter the name for me, because functionality counts.It appears that for some applications, there is a far simpler approach to multi dimensional associative arrays in javascript.Given that the internal representation of all arrays are actually as objects of objects, it has been shown that the access time for numerically indexed elements is actually the same as for associative (text) indexed elements. JavaScript does not provide the multidimensional array natively. For example:In this simple example, you can access child1 like this:So that is, in a way, multidemensional.

(If so, how do I create a multidimensional Object? Solution 1: To solve this problem ECMAScript 5 defines a new method Array.isArray(): Array.isArray(fruits); // returns true. no hierarchy in the dimensions. The typeof operator returns object because a JavaScript array is an object. So multidimensional arrays in JavaScript is known as arrays inside another array. What if we don't know the number of array, for example your code [javasript] var people = ['fred', 'alice']; var fruit = ['apples', 'lemons']; var color = ['red', 'blue'] var..... --> the number of array is unknown [/javascript]Can I access the first item in obj (fred) by numeric index? Syntax: Object.keys(obj) Example: Below program illustrate the use of Object.keys() to accessing the keys of associative array. JavaScript Multidimensional Arrays. Or should I just use an Object entirely and skip having any sort of Array? I'm assuming not.

By clicking “Post Your Answer”, you agree to our To subscribe to this RSS feed, copy and paste this URL into your RSS reader. After reading tons of tutorial, all I could get was this:Just use a regular JavaScript object, which would 'read' the same way as your associative arrays. For this reason, we can say that a JavaScript multidimensional array is an array of arrays.The easiest way to define a multidimensional array is to use the array literal notation. For example:Get the value for an array of associative arrays's property when the property name is an integer:Starting with an Associative Array where the property names are integers:Loop through array and do something with the property value.As you can see, you can get around the associative array limitation and have a property name be an integer.NOTE: The associative array in my example is the json you would have if you serialized a Dictionary[] object.You don't need to necessarily use Objects, you can do it with normal multi-dimensional Arrays.Thanks for contributing an answer to Stack Overflow! Keys are listed below Newton Albert Edison Tesla Method 2: Using Object.keys() function: The Object.keys() is an inbuilt function in javascript which can be used to get all the keys of array. Stack Overflow works best with JavaScript enabled