How to remove specified values ​​from es6 array

Removal method: 1. Use the "arr.splice(arr.indexOf("specified value"),1)" statement, use indexOf() to find the position of the specified value, and then use splice() to delete based on the position. This element; 2. Use the "delete arr[arr.indexOf("value")]" statement.

The operating environment of this tutorial: Windows 7 system, ECMAScript version 6, Dell G3 computer.

Remove the specified value from the es6 array

Method 1: Use the indexOf() and splice() methods

Implementation idea:

• Use indexOf() to find the position of the specified value

• Use splice() to delete based on the position The element

implementation code:

var arr = ["Banana", "Orange", "Apple", "Mango"];
console.log(arr);
var a = arr.indexOf("Apple");
arr.splice(a,1);
console.log(arr);

Method 2: Using the indexOf() method and delete keyword

Implementation ideas:

• Use indexOf() to find the location of the specified value

• Use the delete keyword Delete the element based on position

delete arr[index];

Implementation code:

var arr = ["Banana", "Orange", "Apple", "Mango"];
console.log(arr);
var index = arr.indexOf("Orange");
delete arr[index];
console.log(arr);

Description: After using delete to delete the element, it is time to download The marked position element will be displayed as undefined, that is, the empty element

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