This section provides JavaScript Array methods that allow you to manipulate arrays effectively.
Section 1. Array properties #
- length property – show you how to use the length property of an array effectively.
Section 2. Adding/removing elements #
- push() – add one or more elements to the end of an array.
- unshift() – add one or more elements to the beginning of an array.
- pop() – remove an element from the end of an array.
- shift() – remove the first element from an array.
- splice() – manipulate elements in an array by deleting, inserting, and replacing elements.
- slice() – copy elements of an array.
Section 3. Finding elements #
- indexOf() – return the first index of the matching element in an array.
- lastIndexOf() – return the last index of the matching element in an array.
- includes() – check if an element is in an array.
- find() – find an element in an array
- findIndex() – find the index of an element in an array.
Section 4. High-order methods #
- map() – transform array elements.
- filter() – filter elements in an array.
- reduce() – reduce elements of an array to a value.
- reduceRight() – reduce elements of an array from right to left to a value.
- every() – check if every element in an array passes a test.
- some() – check if at least one element in an array passed a test.
- sort() – sort elements in an array.
- forEach() – loop through array elements.
- with() – return a new array with an element at a specified index replaced by a new one.
Section 9. Advanced Operations #
- Destructuring – show you how to assign the elements of an array to variables.
- Spread operator – learn how to use the spread operator effectively.
Section 11. Reversing elements #
- reverse() – reverse the order of elements in place and return the same array with the elements in the reversed order.
- toReversed() – reverse the order of elements of an array and return the new array with the elements in the reversed order.
Section 11. Multidimensional Array #
- Multidimensional Array – learn how to work with multidimensional arrays in JavaScript.
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