copying an integer array to a variable inside a function

Question

I have an integer array

let arr=[7,1,5,3,6,4]

i am using this array to sort it in ascending order and extract the position of the first smallest element in the original array.My function is defined as

const maxProfit = function(prices) {
    let org=prices
    prices.sort((a,b)=>{return a-b})
    console.log(org)
    let ind=org.indexOf(prices[0])
    console.log(ind) 
};

console.log(maxProfit([7,1,5,3,6,4]))

i was interested in the value of org which is suppose to be [7,1,5,3,6,4] instead i got it as [1,3,4,5,6,7] why the assigning of the original array not working here?

This let org=prices doesn't clone the array. It's the same (now sorted) array. — Gerardo Furtado
– Gerardo Furtado, Commented Mar 9, 2023 at 6:21

Lint · Accepted Answer · 2023-03-09 12:20:41Z

3

Arrays are not primitive types and can't be cloned with = operator. For a relatively small array, you can just simply clone it like this

let arr = [1,2,3]
let newArr = arr.slice()

now you can perform whatever you want on newArr and it will not affect the original array

edited Mar 9, 2023 at 12:20

answered Mar 9, 2023 at 6:30

Lint

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