LeetCode 2629: Function Composition Solution
Master LeetCode problem 2629 (Function Composition), a easy challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.
2629. Function Composition
Problem Explanation
Explanation
To solve this problem, we need to apply function composition from right to left on the given array of functions. We start with the rightmost function and apply it to the input x. Then, we pass the result to the next function to the left, and so on until we reach the leftmost function. If the array of functions is empty, we return the identity function f(x) = x.
Solution Code
import java.util.function.IntUnaryOperator;
import java.util.stream.IntStream;
class Solution {
public IntUnaryOperator compose(IntUnaryOperator[] functions) {
return IntStream.range(0, functions.length)
.mapToObj(i -> functions[functions.length - 1 - i])
.reduce(IntUnaryOperator.identity(), (f1, f2) -> f1.andThen(f2));
}
}Try It Yourself
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