I have JS array with strings, for example: I need to compare for duplicate strings inside array, and if duplicate string exists, there should be alert box pointing to that string. I was trying to compare it with for loop, but I don’t know how to write code so that array checks its own strings for duplic…
Tag: arrays
JSON to XML Using Javascript
I am trying to convert the JSON to XML but not getting exact output.In My JSON having array object it not converting that to XML array.Mainly array object is not converting into XML as expected Actual Output: Expected Output: Please guide me if i am missing anything from the code to get my expected result Ans…
How to flatten nested array of object using es6
I have this array of objects, within it I have another array of objects: How to get flat array of country like this: without using a forEach and a temp variable? When I did: I got the same structure back. Answer Latest edit All modern JS environments now support Array.prototype.flat and Array.prototype.flatMa…
How to check if key exists in array of object
I am trying to find out if the given key exists in array of object. if the value key exists then i want to return true else false. i giving input of key from text box and then checking if the key exists in array of objects, but i couldn’t get it. here is what i have tried code: if
TypeScript: concat arrays with different element-types
This is working. The fine result is But what I need is this – and thats not working. Error: It works if I make the numbers in tail to strings – what I can not do because of reasons. So how can I make it work?? Thanks! Answer You can declare the type of head like this: This will remove
Convert object to array of key–value objects like `{ name: “Apple”, value: “0.6” }`
I have an object like this: Now I want to convert it into an array of key–value objects where each object has the same set of two properties, “name” and “value”, which hold the key and value, respectively, of each property of the original object: Answer You can use Array#map function o…
Create a nested array recursively in Node.js
Following is my array and I want to have objects nested like this as output : Please help me with a recursive function to do this in node.js. Following is the recursive function is what I have tried: Please help me to solve this. I am a newbie in this. Answer Renaming some variables helped me solve this. getN…
How to use Array.from with a XPathResult?
When I use querySelectorAll, I can find 138 td nodes in my sample document. When I do the same with XPath, I get no result: Although there is at least one match: The problem seems to be that Array.from can not iterate over a XPathResult. Even this returns 0: How to make a XPathResult suitable for Array.from? …
Javascript: adjacent Elements Product algorithm
I’m trying to solve a basic javascript algorithm and i’m kinda stuck, here is the question: Given an array of integers, find the pair of adjacent elements that has the largest product and return that product. Example For inputArray = [3, 6, -2, -5, 7, 3], the output should be adjacentElementsProdu…
Group objects by multiple properties in array then sum up their values
Grouping elements in array by multiple properties is the closest match to my question as it indeed groups objects by multiple keys in an array. Problem is this solution doesn’t sum up the properties value then remove the duplicates, it instead nests all the duplicates in a two-dimensional arrays. Expect…