JavaScript: Get all possible subset with a fixed length combinations in an array
JavaScript Function: Exercise-21 with Solution
Write a JavaScript function to get all possible subsets with a fixed length (for example 2) combinations in an array.
Sample array : [1, 2, 3] and subset length is 2
Expected output : [[1,2],[1,3],[2,3]]
Sample Solution:
JavaScript Code:
// Function to get all possible subsets with a fixed length
function getSubsetsWithLength(arr, length) {
const result = [];
// Recursive function to generate subsets
function generateSubsets(currentSubset, start) {
if (currentSubset.length === length) {
result.push([...currentSubset]); // Add a copy of the currentSubset to the result
return;
}
for (let i = start; i < arr.length; i++) {
currentSubset.push(arr[i]);
generateSubsets(currentSubset, i + 1);
currentSubset.pop();
}
}
generateSubsets([], 0);
return result;
}
// Example usage:
const inputArray = [1, 2, 3];
const subsetLength = 2;
const resultSubsets = getSubsetsWithLength(inputArray, subsetLength);
// Log the result to the console
console.log(resultSubsets);
Output:
[[1,2],[1,3],[2,3]]
Flowchart:
Live Demo:
See the Pen JavaScript - Get all possible subset with a fixed length combinations in an array-function-ex- 21 by w3resource (@w3resource) on CodePen.
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