Just trying to update the dates in array2 if ID matches in array1 so that they are not null. Desired output: How do I use a loop with the indexof() method? Answer You could use a map method to iterate trough the second array, find an element with the same id in the first array and take the date from
Tag: arrays
How to merge two object arrays by adding matching object in as a new field
I have these two arrays: My goal is to produce this final array: Basically I want to merge the two goodCars and badCars arrays into one but if the cars exists in both good and badd arrays then I want to add the bad car to the good car array as a new field toCompareWith: {…} (seen above) I’ve tried
Substring all aria-label elements of an array
HTML Here I have a JS script working to get the number of the active slide in result of a variable. to get it, I’ve substring info from “aria-label” (keeping only slide number before ” / 13″) of the active slide: result // numactiveslide: “4” **How to get the same for…
How to replace text with a random array element?
I am trying to replace text with a random element in my array. When the user clicks on the text itself, the word should change to one of the elements in my array. I am having trouble with the function that lets me do so. I have text and wrapped span tags (named “hare”) around words that I want to
How to “un-flatten” array or create an array of pairs
I need to group the points of a <polyline> into an array of [x, y] coordinates. Usually SVGPolylineElement items validate with both comma separated values AND space only separated values. I’m working around: I need an ES6 solution to group arrays like shown above. Answer
how to properly format a v-for loop for multi-level array
I’m learning how the v-for loops work in Vue. Really liking the idea that I can run the loop directly in my template HTML but unsure how to properly use the v-for loop to delve into a multi level array. I have variable called playerDataList it contains some JSON data. A sample of which is below I’…
Flatten objects in array
Hey folks I am getting an array of objects from a response. I need to flatten all of the students objects to simply studentName but not certain how. Any help would be greatly appreciated. Example Array: What I am trying to do: Answer You can create and return a new array of result using map as:
How do I get the difference between two FIFO array states?
I have two arrays that represent a fifo-like state, an old state and a new state. I need a function that finds the newly added items by comparing the new array with the old one. Below 3 examples of two arrays where 1 has items added to the front of it compared to the other: Note that the amount of
Transform an Array into an Object using .reduce()
I am trying to study Array.reduce. And I was given the following task: Input data: And I need to get this data in the output I tried to write some code, but I have no idea how to do it correctly. How can I solve this problem? Code: Answer Corrected the logic
How to check if array of objects that contains another array of object has property
Hi I have an array of objects which contains another array of objects. I need to find an object in array which contains another object in it’s array with certain propery ID. Let’s say i need to find an object in casses array which contains a user with certain ID. ID for user is unique. I could use…