JavaScript Array API Simple description

1, an array plus another (some) array, will not modify the original array will only return the new array

Arrayobject.concat (Arrayx,arrayx,......, Arrayx)

2, separates the array according to the specified string, does not modify the original array will only return the new array

Arrayobject.join ("string")

3, delete and return the last element, will modify the original array

Arrayobject.pop ()

4, add one or more elements to the end of the array, and return the new length, will modify the original array

Arrayobject.push (Newelement1,newelement2,...., newelementx)

5. The order of the array elements of the original array is reversed, and the original array is modified

Arrayobject.reverse ()

6. Remove the first element from the array and return the first element, modify the original array

Arrayobject.shift ()

7, starting from the first few (start) to select how many (end), do not modify the original array

Arrayobject.slice (Start,end)

8, the elements of the array to sort, will modify the original array

Arrayobject.sort (SortBy)//sortby indicates the name of the function

function Sortnumber (A, b) {return a-b}//from small to large sort function sortnumber (A, b) {return b-a}//from large to small sort

9, starting from the number of the array (index), delete how many (Howmany), add what Element (item1,....., ItemX)

Arrayobject.splice (index,howmany,item1,....., ItemX)

10, add one or more elements from the beginning of the array, and return the new length, modify the original array

Arrayobject.unshift (Newelement1,newelement2,...., newelementx)

11, set a function, the array of each number in the function of the method, do not modify the original array, fun for the Set function method

function Fun (num) {  return Num++}arrayobject.map (fun)

JavaScript Array API Simple description