CODEWITHSUNDEEP
javascripthtml
ironman
ironman

Reputation: 3

How to duplicate a const array in javascript

I have a constant array items[], i want to copy it to array2[].

how to do it when i do it the item array get printed two times in console.

how to achieve this aim? 

window.onload="arr1()"
function arr1()
{
const items = [  
      { label: '1:40', url: '1.png'  },
      { label: '2:20', url: '2.png'  },
      { label: '3:50', url: '3.png'  },
      { label: '4:45', url: '4.png'  }]
console.log(items);
console.log(arr2);
}

Upvotes: 0

Views: 1478

Answers (4)

Rahul Dudharejiya
Rahul Dudharejiya

Reputation: 375

just assign items to arr2 to copy all data of items into arr2 like

var arr2 = items;

Upvotes: 0

Shradhey Tripathi
Shradhey Tripathi

Reputation: 380

Try this:
var arr2 = items.slice();
As slice() creates a new array and return it.
Hope it helps!

Upvotes: 0

Sruthi Varghese
Sruthi Varghese

Reputation: 577

const items = [
        { label: '1:40', url: '1.png'  },
        { label: '2:20', url: '2.png'  },
        { label: '3:50', url: '3.png'  },
        { label: '4:45', url: '4.png'  }];
 const arr2 = items;
  console.log(items);
  console.log(arr2);

Upvotes: 2

Steve Bohmbach
Steve Bohmbach

Reputation: 337

function arr1()
{
const items = [  
      { label: '1:40', url: '1.png'  },
      { label: '2:20', url: '2.png'  },
      { label: '3:50', url: '3.png'  },
      { label: '4:45', url: '4.png'  }]
console.log(items);
const arr2 =  Object.assign([],items)
console.log(arr2);
}

window.onload=arr1()

Im not sure if this is what you are looking for. but there is a function that is called 'onload' and then it creates an array prints it, copies it and then prints it again

Upvotes: 0

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