Concat vs. Push for Arrays in Javascript

📅 Apr 28, 2019 · 📝 Apr 30, 2020 · ☕ 1 min read

Someone once said “there shall be standards, and there were standards”. But no one said anything about consistency, uniformity, and stuff like that?

The question is of course not about standards. Let me ask you this one thing - do you have any idea what’s going on with push and contact?

Here’s concat..

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3


const nums = [1, 1, 2, 3];
console.log("nums.contact(): ", nums.concat(5)); // [ 1, 1, 2, 3, 5 ]
console.log("length: ", nums.length); // 4

And then, there’s push..

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console.log("nums.push(): ", nums.push(5)); // 5
console.log("nums: ", nums); // [ 1, 1, 2, 3, 5 ]

Arrgghh.. how can they complement each other so perfectly!?

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WRITTEN BY

Prashanth Krishnamurthy

Technologist | Creator of Things

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