Suppose I have the below array of integers in JavaScript:
[5,7,6,1,7,5,4,8,2,4]
And I want to create a function that extracts all possible 3 element combinations from it, like below:
[[5,7,6],[5,7,1],[5,7,7],etc]
What is the most performant and shortest way to do it?
Is there a better way to do it than for loops?
I think the simplest and most performant way to do it is for loops like this
const data = [5,7,6,1,7,5,4,8,2,4]
const combinations = []
for(let i = 0; i < data.length -2; i++){
for(let j = i + 1; j < data.length -1; j++){
for(let k = j + 1; k < data.length; k++){
combinations.push([data[i],data[j],data[k]])
}
}
}
console.log(combinations)There are more elegant ways to do it but less performant