Array Methods - Slice

Let's learn how to use slice to extract specific parts of an array.

In most programming languages, array indices (the numbers representing the position of elements in an array) start at 0.

This is a traditional convention in programming.

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const fruits = ['Apple', 'Banana', 'Cherry', 'Grape', 'Orange'];

You can access each element of the fruits array as follows:

• First element: fruits[0] => "Apple"

• Second element: fruits[1] => "Banana"

• Fifth element: fruits[4] => "Orange"

You can use the slice() method to extract a portion of an array. slice() returns a new array and does not modify the original array.

Basic structure:

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array.slice([start index], [end index])

• Start index: The position in the array where extraction begins. If omitted, slice starts from the beginning of the array.

• End index: The position in the array where extraction ends, but it does not include this index itself. If omitted, slice extracts through the end of the array.

Example:

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const fruits = ['Apple', 'Banana', 'Cherry', 'Grape'];
const selected = fruits.slice(1, 3);

console.log(selected); // ["Banana", "Cherry"]