30 Days of Javascript 11 - Memoize
Given a function fn, return a memoized version of that function.
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30 Days of Javascript 9 - Return Length of Arguments Passed
Write a function argumentsLength that returns the count of arguments passed to it.
30 Days of Javascript 10 - Allow One Function Call
Given a function fn, return a new function that is identical to the original function except that it ensures fn is called at most once.
30 Days of Javascript 8 - Function Composition
Given an array of functions [f1, f2, f3, …, fn], return a new function fn that is the function composition of the array of functions.
30 Days of Javascript 7 - Array Reduce Transformation
Given an integer array nums, a reducer function fn, and an initial value init, return a reduced array.