Is it possible to generate a new array consisting of all elements ranging from the nth to the (n+k)th positions within an existing array?
Is it possible to generate a new array consisting of all elements ranging from the nth to the (n+k)th positions within an existing array?
If you're looking to extract a portion of an array, you'll need to use the slice method.
To do this, you can use: var newArray = oldArray.slice(n, n+k);
Maybe you could try using the slice method to achieve your desired result.
arrayObject.slice(start, end)
Slicing in JavaScript creates a shallow copy, meaning it does not produce an exact duplicate. To illustrate, take a look at the following scenario:
let array1 = [[5], [10], [15]];
let array2 = array1.slice(0, 2);
console.log(array2); // => [[5], [10]]
array2[0][0] = 20;
console.log(array1); // [[20], [10], [15]]
console.log(array2); // [[20], [10]]
The following code snippet is a prototype solution for creating a custom method to take elements from an array:Array.prototype.take = function (count) {
return this.slice(0, count);
}
Imagine we have a collection of six items and we need to retrieve the first three.
Here's how you can do it:
let set = [{id:1}, {id:2}, {id:3}, {id:4}, {id:5}, {id:6}];
set.slice(0, 3); // this will give you the first three elements
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