How to convert array to array of array in Javascript?-CodePudding

How to convert single array to array of array?

This is below present code, which is not working

array1 = ['a', 'b', 'c', 'd', 'e'];
array2 = [];

onClick() {
 this.array2 = this.array2.push(this.array1);
 console.log(this.array2);
}

Desired output is

array2  = [['a', 'b', 'c', 'd', 'e']];

CodePudding user response：

You only need to remove variable from pushing statement. like

 array2.push(array1);
 console.log(array2);

const array1 = ['a', 'b', 'c', 'd', 'e'];
const arr2 = [];
arr2.push(array1);
console.log(arr2);

CodePudding user response：

You can do that simply with const array2 = [array1];

CodePudding user response：

use this:

this.array1 = ['a','b','c','d','e']
this.array2 = []
onClick() {
    this.array2.push(this.array1);
}

Explanation: Not using 'this' will make you a global variable, where the object's (this) array1 and array2 will remain a undefined. So you need to declare array1 and array2 in the object by using 'this' before the two declarations.

CodePudding user response：

You have to extract first array and push the elements of first array to second array. Here down is little example.

const array1  = ['a', 'b', 'c', 'd', 'e'];
const array2  = [];
 
for(const i of array1) {
    array2.push(i);
}
 
console.log(array2);