How javascript array deletes the last element

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Delete method: 1, use Array's pop () method, syntax "array.pop ()"; 2, use delete operator, syntax "delete arr [arr.length-1]"; 3, use splice () method, syntax "arr.splice (- 1)".

The operating environment of this tutorial: windows7 system, javascript1.8.5 version, Dell G3 computer.

Method 1: use the pop () method-you can delete an element at the end of the array

The array.pop () method deletes the last element in the array array and returns the deleted element.

Let's take a look at the following examples:

Var arr = [2, 4, 6, 8, 10]; / / define the array arr.pop (); console.log (arr)

Method 2: delete the last element of the array using the delete operator

Var arr = [2, 4, 6, 8, 10]; / define the array var len=arr.length;// to calculate the array length delete Arlen [Len-1]; / / delete the last element (array length-1) console.log (arr)

Method 3: use the splice () method

Var arr= [1Jing 2 Jing 3 Jing 4 Jo 5]; / / starting from the penultimate element, intercept two elements arr.splice (- 1 Jol 1); console.log (arr)

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