Thread by @denicmarko

JavaScript Array methods explained.

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1. concat()

Returns a new array that is this array joined with other array(s) and/or value(s).

2. copyWithin()
Copies a sequence of array elements within the array.

3. every()
Returns true if every element in this array satisfies the testing function.

4. fill()
Fills all the elements of an array from a start index to an end index with a static value.

5. filter()
Returns a new array containing all elements of the calling array for which the provided filtering function returns true.

6. find()
Returns the found element in the array, if some element in the array satisfies the testing function, or undefined if not found.

7. findIndex()
Returns the found index in the array, if an element in the array satisfies the testing function, or -1 if not found

8. forEach()
Calls a function for each element in the array.

9. includes()
Determines whether the array contains a value, returning true or false as appropriate.

10. join()
Joins all elements of an array into a string.

11. map()
Returns a new array containing the results of calling a function on every element in this array.

12. push()
Adds one or more elements to the end of an array, and returns the new length of the array.

13. reverse()
Reverses the order of the elements of an array in place.

14. slice()
Extracts a section of the calling array and returns a new array.

15. some()
Returns true if at least one element in this array satisfies the provided testing function.

16. sort()
Sorts the elements of an array in place and returns the array.

17. splice()
Adds and/or removes elements from an array.

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