#reducemethod — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #reducemethod, aggregated by home.social.
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Skip One, Sum the Rest: A Smart JavaScript Array Trick
When working with arrays in JavaScript, we often need to calculate the total sum of elements. But what if you want to exclude one specific index while summing? Let’s understand this with a simple and practical example. Problem Statement Given an array: const a = [1, 2, 3, 4]; If we exclude index 2, the value 3 should be ignored. 👉 So the result becomes: 1 + 2 + 4 = 7 Approach We need to: Loop through the array Skip the given index Add all other values Solution 1: Using for […]https://learnersstore.com/2026/04/28/skip-one-sum-the-rest-a-smart-javascript-array-trick/