I am trying to cut a section of a 2d array specified by x, y and w, h. an example of an array I’m trying to cut would be so if i called snapshot(2, 1, 4, 2) my desired output would be So far I can cut the section and return a new array successfully but only if my Width
Tag: arrays
Sorting a JS array based on an array with new indices
I can’t seem to find a neat solution to this fairly simple problem. I have an array of objects likes this: Additionally, i have an array containing new array indices that i want to apply to the above items: Meaning items[0]’s new index is 2, items[1]’s new index is 0, etc… Right now i …
Is there a solution to reorganize the following array in javascript?
I want to transform this array [‘1′,’3′,’+’,’8′,’0′,’/’,’5′,’7′,’0′] into [’13’,’+’,’80’,’/’,’570′] I tried this: Answer You could test if the…
Javascript / Vue JS – Retrieve value of all elements in object
I have an object that retrieves 4 different elements with different numerical values. I’m trying to access and retrieve all these numerical values. The object returns the following: If I want to retrieve the value of the collectedTrashCount, I would simply do the following: The console.log in this case …
JQuery – Adding random numbers to an array and then checking if there are repetitions before printing array
I’m trying to write a “for” loop that will go through a list of 30 songs in an array and then print a list of 20 random items in that array with no repetitions. Answer If I only focus on the question title. Adding random numbers to an array and then checking if there are repetitions before p…
How to convert Map key values into array in JavaScript
I have a Map that contains keys and their value. I want to convert all keyvalues into an array I want that my new array should look like this Answer this will do
Replace an item in an array that doesn’t match any item in another array with a specific value
I’m still VERY new to Javascript and I’m having trouble with looping through an array and replacing items. I hope this explanation is clear. I have an array that looks like this: and I have another array that looks like this: I want to replace any value in the first Array that isn’t in a /([…
How to build a Set of unique Arrays?
I want to add many arrays to a Javascript set, and ensure that only unique arrays are added to the set. However, when I try adding the same array multiple times, it is always added instead of rejected. The .has() method always returns false as well. How do I fix this? Answer I’d use a Map instead, index…
How to use the result of an iteration to re-iterate?
I need to create a new array from another with the condition: for example from an array I need to make an array [‘1′,’2′,’148′,’151’] which means the path from “parentId”‘s to “id”:152 – (argument for this function). I think m…
What difference with them? ‘!arr.length’ and ‘arr.length=0’
What difference with them? ‘!arr.length’ and ‘arr.length=0’ i can’t understand well 🙁 Really appreciate it, if you explain it logically. Thanks.. 🙂 Answer They are completely different. !arr.length will evaluate to true if the array has no items. It will evaluate to false if the …