Let's say we have a function that makes expensive calculation and an array of source values for which we do the calculation. We want to get a first return value of the function that is not null and return it.…
I have an array of objcets. With reduce method after looping i want to receive two seperate arrays. Now, i am doing this way. const dogs = [ { weight: 22, curFood: 250, owners: ['Alice', 'Bob'] }, { weight: 8,…
Need to reduce an array of Objects to return the highest value of the same name. Need the following, [ { name: 'a', value: 20 }, { name: 'a', value: 80 }, { name: 'b', value: 90 }, { name:…
I want to reduce an array of objects like this: var data = [{ item: "Item 1", pages: 30, chapters: 3 }, { item: "Item 1", pages: 50, chapters: 3 }, { item: "Item 2", pages: 10, chapters: 3 }…
Is it possible to have two accumulators with the reduce method? I need to pass another const inside my reduce. I want to do the same as const one with const two. Do I have to create a new method…
I'm using React JS, and I'm trying to find the average of this array: [ "75.0%", "50.0%", "66.66666666666666%", "66.66666666666666%", "33.33333333333333%", "58.333333333333336%", "50.0%", "66.66666666666666%", "41.66666666666667%", "75.0%", "41.66666666666667%", "50.0%", "50.0%", "72.72727272727273%" ] Here's my current code: const percentCorrects = [ "75.0%", "50.0%",…
I have this code snippet I'm using to group by a key field. It's using the reduce function and I understand the code except the part where the result or accumulator of the function is being edited. If I were…
I've got data like this [ [ '@test','1.2.6-unstable' ], [ '@test','1.3.2-unstable' ], [ '@test','1.4.6-unstable' ], [ '@test2','4.0.1-unstable' ], [ '@test2','4.0.2-unstable' ], [ '@test2','4.0.3-unstable' ], [ '@test3','2.2.0-unstable' ], [ '@test3','2.2.3-unstable' ], [ '@test3','2.2.9-unstable' ], ... ] and I'm trying to group…
I'm attempting to find the number of occurrences based on input value for ownerId in the JavaScript Json Object below. If the ownerId is the number "1" the result should be three since the ownerId appears 3 times. ownerID: 3…
I can add different products as individual arrays and I can also increase and decrease the quantities if the same product added. But I would want to add same product with different size. Below is my code.. Please help out..!…