I am trying to map the values of userIDs to listUserIds, and then use values of listUserIds as keys in listUser function. But it only show the last value. What did I go wrong? } Answer You can set the values like this. using map you can collect all the ids then you can update the state.
Tag: arrays
Javascript how to merge or combine array of days with same opening hours
I have an array of days and the opening hours: And I want to combine the days where the opening hours are the same. So, basically my goal is to display the opening hours like this: So, I tried to to this: but this doesn’t really work. I have created a JSFIDDLE so please check it out. Can someone help
Recursion with map function in javascript
I have a map like this, which represents a graph: And I have this class, which creates a rooted tree: My goal is: given a root, I want to convert that graph to a rooted tree. For the example above, using 1 as root, I want the following return: Here’s my code: I’m receiving an empty array from the …
Search through literal object and all its nested objects (up to nth level) with a generalized function [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 1 year ago. The community reviewed whether to reopen this question 1 year ago and left it closed: Original close reason(s) were…
Counting the occurrences in an array
I have a simple array such as: I want to display the element that has the highest occurrence, in this case “Jalkatreeni”. How should I go about doing it? Any neat tips are appreciated. 🙂 Thank you in advance! Answer Try the following. You can iterate through your array using .reduce(). In each ite…
How does one access properties within a nested array and object data structure?
How can I access properties within a nested array and object data structure. I wish to access the data within the sub property of the object. However as you can see the sub property values do feature objects as well. So here is my code where I am using loop to access the property within this objects which wou…
Using map() or similar function to return the array data in the following format
I have the following javascript array (I’m having fun with map() today) – I want to be able to return the pages data but have the page id as the key and the index for the position of that page within the pages array as the value. What am I doing wrong? Expected output Here is a stackblitz to the
create new array from nested array object
i want to create a new array from api, but i don’t know how to make it, i’m very confused in looping each array This is each data this is the main data of api i want to create a new array like this, bcs i want to create a new object containing the group_id of each same data in
JS how to group hh:mm – hours arrays without minutes
How can we group hour arrays according to hours. As you see, an hour has multiple minute, like 22:37, 22:52. I want to create new array like It contains two days hours. I tried like this But it gives me this result Answer Update Solution for several days:
Sort by Status then by date JavaScript
I have an array of the following type I wan to sort. I want to sort them by the status and show false ones first and and then sort them by their date. I don’t know if I should use group by then sort. I have used the below code it sorts the array by status but the date sorting