When working with JavaScript arrays, there might be instances where you only need to retrieve a specific number of items from the beginning of the array. In such cases, you can make use of the slice()
method, which is a built-in function available for every instance of an array.
To get the first n
items from a JavaScript array, follow these steps:
- Define your array:
const arrayToCut = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
- Set the value of
n
to the desired number of items you want to retrieve from the array:
const n = 5; // Retrieve the first 5 items
- Use the
slice()
method on the array, passing in the starting and ending indices:
const newArray = arrayToCut.slice(0, n);
By specifying the indices 0
and n
, the slice()
method will extract the first n
items from the array and return them as a new array called newArray
. It’s important to note that the original array, arrayToCut
, remains unmodified by this operation.
In summary, to retrieve the first n
items from a JavaScript array, utilize the slice()
method by providing the starting index of 0
and the desired number of items as the ending index.