I would like to add a number of key:value pairs to an existing JSON string. The values are passed as command line arguments to my script. So far I've got this data='{"update": { "labels": [] } }' for label in…
I often have to check if an item is part of an array. If it is, I would like to remove it. If it's not, then it should be added. Essentially its toggling the existence of a given item in…
I have a chain of methods that treat an array. Then I was trying to do a simple thing: add an element at the start of the array in a method chain. Initially I tried: console.log( [1, 2, 3] .map(a=>a+1)…
I have an array of objects. Each contains a "lv" property, which is an integer >= 0. [ {lv: 0, name: "A"}, {lv: 1, name: "B"}, {lv: 1, name: "C"}, {lv: 2, name: "D"}, {lv: 3, name: "E"}, {lv: 1,…
Why can't I get the output I want, I tried various ways but it doesn't work, where is it wrong? Give me a clue so I can learn. let laptop = ["asus", "lenovo", "acer", "hp", "axioo"]; let gpu = [4070,…
This is my array. I want to get the sub-arrays where the first element is "admin". const array = [["admin", 1234], ["user", 999], ["admin", 5555]]; The expected output should look like this: [admin,1234], [admin,5555]
I’m trying to sort an array of 6 integers in descending order(javascript) but keep matching values in their place as the other values are sorted. An example is posted below to help explain this problem: Input: 4, 2, 5, 4,…
I need to fetch all the user libraries from the backend and display them in a dropdown menu. I created a separate JS file to fetch the libraries from the backend, and then called that JS file in my main…
I have a strings with pattern, something like this: (X,1,1,3),(X,1,1,3),(X,@2,@2,@2,@2,@2,(Y,1)) And I need to extract from this One big array, reverse order, and generate new string: (X,(Y,1),@2,@2,@2,@2,@2),(X,3,1,1),(X,3,1,1) And expected array: Array ( [0] => Array( [parent] => (X,1,1,3) [childs] =>…
In Javascript, if we reverse the array using reverse() or toReversed() both have the same output, how do they differ? Like if, arr = [1, 2, 3];