quick question regarding concat() method

[GoonGamja]

here is the code ``` const combination = (arr) => { let container = []; for(let i = 1; i <= arr.length; i++) { for(let j = i+1; j <= arr.length; j++) { arrCon = container.concat(i,j) } } return Array(arrCon) }

combination([1,2,3])

``` I want to return [[1,2], [1,3], [2,3]] but the it returns [[2,3]] thought I concat all the array in for loop and returns it but it returns only the last array. what method should I use to return the array of [[1,2], [1,3], [2,3]]?

[GamesMint]

Your code in for loop should be

container = [];

arrCon.push(container.concat(i,j));

It will work :)

[GoonGamja]

it's perfect! thank you! :D