rashmi agar
2 posts
Mar 07, 2025
8:20 PM
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Hey developers,
I’m learning about array methods in javascript array concat upon Array.concat(). From what I’ve read, it helps combine multiple arrays into a single one, but I’d love to get some real-world use cases.
Here’s a basic example:
javascript
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let firstArray = ['a', 'b', 'c'];
let secondArray = ['d', 'e', 'f'];
let mergedArray = firstArray.concat(secondArray);
console.log(mergedArray); // ['a', 'b', 'c', 'd', 'e', 'f']
A few questions:
Is concat() better than using the spread operator ([...]) for merging arrays?
How does concat() handle nested arrays?
What happens if I pass non-array values into concat()?
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