How to merge es6 arrays

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There are three methods: 1. Use "for (I in array 2) {array 1.push (array 2 [I])}" to traverse the array and add the value of one array to the end of another array; 2, use "array 1.concat (array 2...)" Statement to join multiple arrays; 3. Use "[. Array 1. Array 2]" statement.

The operating environment of this tutorial: windows7 system, ECMAScript version 6, Dell G3 computer.

Es6 number combination and union method

Method 1: using for in loop

Var a = [1je 2jue 3]; var b = [4je 5je 6]; console.log (a); console.log (b); for (var i in b) {a.push (b [I]);} console.log (a)

Method 2: using concat ()

The concat () method is used to join two or more arrays.

Array1.concat (array2,array3,...,arrayX)

A new array is returned. The array is generated by adding all arrayX parameters to the arrayObject. If the argument to concat () is an array, then the elements in the array are added, not the array.

Var a = [1Jing 2jue 3]; var b = [4JJ 5J 6]; console.log (a); console.log (b); console.log (a.concat (b)); console.log (b.concat (a))

Method 3: use the extension operator "."

Var a = [1JI 2jue 3]; var b = [4JE 5J 6]; console.log (a); console.log (b); console.log ([... a dint.. b])

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