javascript - How to filter to multiple paths using functional programming -

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i have following pseudo-code:

let array = getdata(); array.filter(x => condition1(x)).dosomething1... array.filter(x => condition2(x)).dosomething2... array.filter(x => condition3(x)).dosomething3...

obviously not efficient because iterates array 3 times.

i wondering if there way like:

array.filtermany([     x => condition1(x).dosomething1...,     x => condition2(x).dosomething2...,     x => condition3(x).dosomething3... ])

so array gets iterated once?

you can use array reduce functionality.

for example:

    const arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];            const split = arr.reduce(([odd, even], current) => {          if (current % 2 === 0) {             even.push(current);          } else {             odd.push(current);          }                return [odd, even];      }, [[], []]);            console.log('odd / even', split);





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