I have a JavaScript array like this: I need the array elements to be unique and sorted: Even though the members of array look like integers, they’re not integers, since I have already converted each to be string: Is there any way to do all of these tasks in JavaScript? Answer This is actually very simple. It is much easier
Tag: arrays
How to change value of object which is inside an array using JavaScript or jQuery?
The code below comes from jQuery UI Autocomplete: For example, I want to change the desc value of jquery-ui. How can I do that? Additionally, is there a faster way to get the data? I mean give the object a name to fetch its data, just like the object inside an array? So it would be something like jquery-ui.jquery-ui.desc =
JavaScript: Split array into individual variables
Considering this data structure: Looping through each vehicles item, is there a way to reassign the array elements to individual variables all in one shot, something like: … I’m trying to get away from doing: Just curious since this type of thing is available in other programming languages. Thanks! Answer Now it is possible using ES6’s Array Destructuring. As from
How to get character array from a string?
How do you convert a string to a character array in JavaScript? I’m thinking getting a string like “Hello world!” to the array [‘H’,’e’,’l’,’l’,’o’,’ ‘,’w’,’o’,’r’,’l’,’d’,’!’] Answer Note: This is not unicode compliant. “I💖U”.split(”) results in the 4 character array [“I”, “�”, “�”, “u”] which can lead to dangerous bugs. See answers below for safe alternatives. Just split it by an
How to declare an array in JS (like I’d do it in PHP)?
Hey, Im trying to make a nested array in JS Chrome’s debugger tells me the ), at the end of the first nested array is an “Unexpected Token” Answer From your code it looks like you’re trying to use PHP-style arrays in JavaScript. JavaScript arrays don’t work like PHP arrays. Here’s something that’s more likely to work: To explain a
Fastest way to duplicate an array in JavaScript – slice vs. ‘for’ loop
In order to duplicate an array in JavaScript: Which of the following is faster to use? Slice method For loop I know both ways do only a shallow copy: if original_array contains references to objects, objects won’t be cloned, but only the references will be copied, and therefore both arrays will have references to the same objects. But this is
Best way to convert string to array of object in javascript?
I want to convert below string to an array in javascript. How do I convert this string into array of objects? Any cool idea? Answer I think that the best way of doing this, as Douglas Crockford (one of the biggests gurus of JavaScript) suggests in here is using the JSON native parser, as it is not only faster than
Populating JavaScript Array from JSP List
Ok so perhaps someone can help me with a problem I’m trying to solve. Essentially I have a JSP page which gets a list of Country objects (from the method referenceData() from a Spring Portlet SimpleFormController, not entirely relevant but just mentioning in case it is). Each Country object has a Set of province objects and each province and country
How to create an array in JavaScript whose indexing starts at 1?
By default the indexing of every JavaScript array starts from 0. I want to create an array whose indexing starts from 1 instead. I know, must be very trivial… Thanks for your help. Answer It isn’t trivial. It’s impossible. The best you could do is create an object using numeric properties starting at 1 but that’s not the same thing.
Javascript array length incorrect on array of objects
Could someone explain this (strange) behavior? Why is the length in the first example 3 and not 2, and most importantly, why is the length in the second example 0? As long as the keys are numerical, length works. When they are not, length is 0. How can I get the correct length from the second example? Thank you. Answer