JavaScript Array Methods
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Array Methods Demo
Add Your Company
Try the following
- Add empty value
- Add duplicate value eg) 'BMW', 'Audi', 'Ford'. (case-sensitive)
- Add random value eg) your name
Hints
The above demo uses the following array methods.
- Array.indexOf() - to check for duplicate company.
- Array.push() - to add your company to array items.
List of Array Methods
The following table provides a list of all array methods available in JavaScript.
| Method | Explanation |
|---|---|
| concat() | Joins two or more arrays and returns a copy of joined arrays |
| copyWithin() | Copies a sequence of array elements within the array |
| entries() | Returns the key/value pairs for each index in the array |
| every() | Checks if every element in an array satisfies the given condition |
| fill() | Fill the elements in an array with a static value |
| filter() | Creates a new array with every elements in an array that statisfies the given condition |
| find() | Returns the value of the first element in an array that satisfies the given condition |
| findIndex() | Returns the index of the first element in an array that satisfies the given condition |
| forEach() | Calls a function for each element in the array |
| from() | Creates a new Array iterable object (string, object, etc) |
| includes() | Check if an array contains the specified element |
| indexOf() | Search a specified element in an array and return the first (least) index of an element, or -1 if none is found |
| isArray() | Checks whether the given object is an array |
| join() | Joins all elements of an array into a string |
| keys() | Returns a new Array Iterator that contains the keys for each index in the array |
| lastIndexOf() | Search a specified element in an array and return the last (least) index of an element, or -1 if none is found |
| map() | Creates a new array with the results of calling a provided function on every element in this array |
| pop() | Removes the last element from an array and returns that element |
| push() | Adds new elements to the end of an array and returns the new length of the array |
| reduce() | Apply a function against an accumulator and each value of the array (from left-to-right) as to reduce it to a single value |
| reduceRight() | Apply a function against an accumulator and each value of the array (from right-to-left) as to reduce it to a single value |
| reverse() | Reverses the order of the elements in an array |
| shift() | Removes the first element from an array and returns that element |
| slice() | Extracts a part of an array and returns a new array |
| some() | Checks if any of the elements in an array satisfies the given condition |
| sort() | Sorts the elements of an array |
| splice() | Adds and/or removes elements from an array |
| toLocaleString() | Returns a localized string representing the array and its elements |
| toString() | Converts an array to a string and returns the string |
| unshift() | Adds one or more elements to the beginning of an array and returns the new length |
| valueOf() | Returns the primitive value of an array |
| values() | Returns a new Array Iterator that contains the values for each index in the array |
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