I have to decrypt some strings which are AES encrypted. Example encrypted string: 129212143036071008133136215105140171136216244116 I have a key, and a vector (iv) supplied to me in a byte-array format: Key: [ 123, 217, 20, 11, 24, 26, 85, 45, 114, 184, 27, 162, 37, 115, 222, 209, 241, 24, 175, 144, 175, 53, 1…
Tag: arrays
Find last matching object in array of objects
I have an array of objects. I need to get the object type (“shape” in this example) of the last object, remove it, and then find the index of the previous object in the array that has the same type, e.g. “shape”. So, obviously the type in this example will be “round”. But I…
Javascript: .push is not a function
I am having a problem with my code: I get this error: As far as I understand, this is because it is treating the array argument as something other than an array. However, I thought I fed it the variable “current” which is an array. Can someone explain the problem? Thanks. Answer Array.push doesn&#…
Check if arrays contain shared elements regardless of index
I’d like to check if two arrays share elements regardless of order. Given Will return matches for ‘hello’, ‘how’, and ‘are’ There seems to be something for PHP, array_intersect() (Check if array contains elements having elements of another array), but nothing for Java…
How to get index of object in array of objects and splice it?
I’m using angular 1.3, but his question maybe related only to javascript. My candidates array: My peoples array: And i’ve some checkbox too: So i’ve a function that toggles an item (from candidates) and I want to add or remove (if already exists) For some reason, if (idx > -1) its never t…
A fast way to draw/update colors of a 2d array of squares in JavaScript
I’m working on a game in JavaScript which has a 2d array of squares that update their background colors every frame. So far I’ve been using a borderless DOM table for this task by setting the style.backgroundColor of each cell every frame, but it’s fairly slow. Is there a way to do this fast…
How to convert an array of key-value tuples into an object
I have an array: But I can’t access data via an array’s key, e.g. arr[‘txnId’] does not return 20181. How can I convert the above array of tuples into an object, so that I can easily access data by key. Answer Update June 2020 ECMAScript 2021 brings Object.fromEntries which does exactl…
What is the most elegant way to insert objects between array elements?
I’m sure there are many ways to achieve that but I’m looking for something “elegant”. All proposals are welcome. 🙂 Answer This worked for me:
Recreate an object from an array of objects in Javascript
I could use some help with the following: I’m trying to create a filterable wordpress nav menu using React Tree Menu. The Tree Menu component requires the following data structure: I have set up parent and child pages of the above in wordpress and have also created a hierarchical wordpress menu. I am us…
Sort object by array within array?
I have a local storage that looks like this: I need to somehow sort it to look like this I’ve tried storing it in a matrix such as this: Where x is the first set of numbers, y is the next and then values is Bob, Dad etc…from there I could just do a foreach for both sections of the