How to find index of ‘items_tolookfor’ array of items in another nested Array List ‘nested_data’ in javascript How would I find indices for ‘items_tolookfor’ in the nested array list ‘nested_data’ Also, the corresponding data lies in the nested list ‘nested_data’ index[2][5] I was trying this code: Expected result to be a console log output array with matching data for items_to_look_for
Tag: arrays
How to get number of occurrences in an array in array? Javascript
In JavaScript, I want to count the number of times “N” in is in the first, second, third, fourth column. I want each other there values. I want to get the number of occurrences in an array in array, and then get four numbers equal the occurrences. input: output: 3 2 2 2 Answer
How would you generate missing data using single loop from an array which can contain from 0 to 7 elements?
So I have an API which returns me the value of water dispensed for the last 7 days and it can contain an empty array or a value such as: Assuming today is Thursday and I need an array of objects which would fill missing last 7 days data as: How would you do this considering that you need to
How to get data form Same with many elements as separate set for each input field?
I have a with 3 tags as given below; I enter record of 2 persons. I select 2 images for 1st person and 3 images for 2nd person. When I submit form then I receive data as following; Problem is, How can I identify which images belongs to which person. I need data as separate set for each person as
How to join two array conditionally based on the date in javascript
I have two arrays of users which have the same iDs. I want to merge them based on the updatedAt property that each user has. The user who has newer updatedAt property has priority. Output should be ] Answer You can use Array.reduce() to group users by id, replacing any entry with a newer updatedAt property. Once we have the
How to – When image is clicked set opacity to 1 and lower opacity for other images
I couldn’t for the life of me figure this out! How can I make this happen – When image is clicked set opacity to 1 and lower opacity for other images? I was told to add a class to the clicked image, store it, then remove the class when another image is clicked? but i cant figure it out! Answer
The frontend receives an array as [object Object]
I am building a website with JavaScript, express.js, ejs and Node.js and i just ran into a problem. I am sending an array to the frontend this way: And getting it on the frontend with ejs this way: If i print the array on the frontend the result will be [object Object] and I also printed out typeof(‘<%= array %>’)
How to return an array of numbers that represent lengths of elements string?
If an array was: [‘hey’, ‘you’, ‘muddy’] The expected output should be: [3, 3, 5] This is what I have so far: Any help would be much appreciated. Answer You need to push the length of every item (using Array#push) and return the array in the end: Another solution using Array#map:
How do you check for a type in an array?
I need to tell the program to search an array(that’s meant to be only numbers) if it contains any element that’s a string. Also, the array is made up of the arguments to a function. Can someone please help? I’ve been trying to figure this out for at least an hour! This is what i did so far: Answer You’re
Array.prototype.find() – Error: Cannot read properties of undefined (reading x)
I have a Typescript project in which I have an array of objects from which I want to extract the value of a key where another value matches the local variable. I need to get the value of sheetId of the object where the value of title is equal to the value of fileName This is my object: This is