How to remove specific numbers from es6 array

es6 Method to remove specific numbers from an array: 1. Use the indexOf() function to obtain the index of a specific number, using the syntax "array object.indexOf(value)"; 2. Use the splice() function to obtain Delete elements with the index value, syntax "array object.splice(index, 1)".

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

How to remove specific numbers from es6 array

Step 1. Use indexOf() to get the index of a specific number

The indexOf() method returns the position of a specified element in the array.

This method will retrieve the array from beginning to end to see if it contains the corresponding element. The position to start retrieval is at array start or at the beginning of the array (when no start parameter is specified). If an item is found, the position of the first occurrence of item is returned. The index of the starting position is 0.

If the specified element is not found in the array, -1 is returned.

Example: Find the "39" element in the array

var arr = [31,33,35,37,39,41,43,45,57,49,51,53];
//查找数组中的 "39" 元素
var index = arr.indexOf(39);
console.log(index);

Step 2. According to the obtained index value, Use splice(index,1) to delete the element

index represents the subscript position of the array element, and 1 represents the deleted element.

var arr = [31,33,35,37,39,41,43,45,57,49,51,53];
console.log(arr);
//查找数组中的 "39" 元素
var index = arr.indexOf(39);
console.log("指定元素的索引："+index);
//删除该元素
arr.splice(index, 1);
console.log(arr);

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