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Articles tagged with #javascript
There are so many articles or tutorial that teach about React performance optimization using memo() and useMemo(). But in some case, you don't need to use memo() or useMemo() for that. In this article, I want to share two different techniques that ve...
馃挕 Concept: Closure is a function that can access to parent scope even after the parent function has closed. To understand this concept we need to break it down in two part. Part 1: Variable and scope. A variable can belong to the local or global s...
Hoisting in Javascript's default behavior of moving declarations to the top of the current scope. Example 1: x = 5 console.log(x); // return 5 var x; // declaration part Expand: Hoisting in JS is the behavior of JS when it will move all declaration...
Problem: Given an integer array nums, return all the triplets [nums[i], nums[j], nums[k]] such that i != j, i != k, and j != k, and nums[i] + nums[j] + nums[k] == 0. Notice that the solution set must not contain duplicate triplets. Example 1: Input: ...
Link https://leetcode.com/problems/two-sum-ii-input-array-is-sorted. Problem: Given a 1-indexed array of integers numbers that is already sorted in non-decreasing order, find two numbers such that they add up to a specific target number. Let these tw...
Problem: A phrase is a palindrome if, after converting all uppercase letters into lowercase letters and removing all non-alphanumeric characters, it reads the same forward and backward. Alphanumeric characters include letters and numbers. Given a str...
