Adding and Removing Elements

splice(): Changes the contents of an array by removing or replacing existing elements and/or adding new ones.

// Syntax: array.splice(start[, deleteCount[, item1[, item2[, ...]]]])
let months = ['Jan', 'March', 'April', 'June'];
months.splice(1, 0, 'Feb');
// Inserts 'Feb' at index 1: ['Jan', 'Feb', 'March', 'April', 'June']
months.splice(4, 1, 'May');
// Replaces 1 element at index 4: ['Jan', 'Feb', 'March', 'April', 'May']

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19 JavaScript Array Methods Everyone Needs to Know

OpenSource on November 25, 2023

🟢 🟢 🟢 Green Methods Adding and Removing Elements push(): Adds one or more elements to the end of an array and retu...

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Mike Stemle • Nov 26 '23 • Edited

I wish this wasn’t just a list of headings. I read it and didn’t feel like I learned anything other than what you are promoting.

Mozilla Developer Network (MDN) has this documentation and more, with explanations and comparability notes. It can be found here: developer.mozilla.org/en-US/docs/W...

OpenSource • Nov 26 '23 • Edited

Ow, it’s a compilation, yes. I’m sorry you didn’t like it. And thanks for the link. 👍

Scott Reno • Nov 27 '23

Very good information but I don't understand the colors. What does "Green" mean vs "Blue"?

OpenSource • Nov 27 '23

Thank you, I’m glad. The colora are just a way of naming the groups in an easier to remember way. But feel free to ignore it and keep the “subtitle” only.