JavaScript provides a number of built-in methods for working with arrays. Arrays are a fundamental data structure in JavaScript that allow you to store and manipulate collections of values.
Here are some of the most important array methods in JavaScript:
- push()
- pop()
- shift()
- unshift()
- splice()
- slice()
- concat()
- join()
- indexOf()
- forEach()
- map()
- filter()
- reduce()
- sort()
- find()
- reverse()
push(): The push() method adds one or more elements to the end of an array and returns the new length of the array.
pop(): The pop() method removes the last element from an array and returns that element.
shift(): The shift() method removes the first element from an array and returns that element.
unshift(): The unshift() method adds one or more elements to the beginning of an array and returns the new length of the array.
splice(): The splice() method adds or removes elements from an array at a specific index. It can be used to add new elements, remove existing elements, or replace elements.
slice(): The slice() method returns a new array that contains a portion of the original array. It can be used to extract a range of elements from the array without modifying the original array.
concat(): The concat() method combines two or more arrays into a new array.
join(): The join() method creates a new string by concatenating all the elements in an array.
indexOf(): The indexOf() method returns the index of the first occurrence of a specified element in an array, or -1 if the element is not found.
forEach(): The forEach() method calls a function once for each element in an array.
map(): The map() method creates a new array by calling a function for each element in an array.
filter(): The filter() method creates a new array with all elements that pass the test implemented by the provided function.
reduce(): The reduce() method applies a function against an accumulator and each element in the array to reduce it to a single value.
sort(): The sort() method sorts the elements of an array in place.
find(): The find() method returns the value of the first element in an array that satisfies a provided testing function.
reverse(): The reverse() method reverses the order of the elements in an array in place.
These array methods are powerful tools for manipulating arrays in JavaScript. By using them effectively, you can perform a wide range of tasks, from adding and removing elements to sorting and searching arrays.
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