Reduce function does not reduce anything. Reduce is the function to take all the elements of an array and come out with a single value out of an array.

I have this code for a class where I'm supposed to use the reduce() method to find the min and max values in an array. However, we are required to use only a single call to reduce. The …

What scenarios would warrant the use of the "Map and Reduce" algorithm? Is there a .NET implementation of this algorithm?

2012年2月2日 · 9 From the Python reduce documentation, reduce (function, sequence) returns a single value constructed by calling the (binary) function on the first two items of the sequence, …

After the first iteration your're returning a number and then trying to get property x of it to add to the next object which is undefined and maths involving undefined results in NaN. try returning …

@Sethen Maleno, @Pavel: yes _ does have a reduce for objects. Not sure if it works by accident or if object support was intentional, but indeed you can pass an object as in this question's …

2016年3月22日 · The answer is you cannot break early from reduce , you'll have to find another way with builtin functions that exit early or create your own helper, or use lodash or something.

The problem is that your accumulator values are promises - they're return values of async function s. To get sequential evaluation (and all but the last iteration to be awaited at all), you …

2012年12月30日 · It's actually the JavaScript array reduce function rather than being something specific to TypeScript. As described in the docs: Apply a function against an accumulator and …

2016年3月24日 · reduce behavior differs a little bit between native (Scala) and guest languages (Python) but simplifying things a little: each partition is processed sequentially element by …