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Lodo4ka/custom filter function

Created September 7, 2019 09:53
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custom filter function
const fn = (f, list) => {
if(list.length === 0) {
return [];
}
const [x, ...xs] = list
return f(x) ? [x, ...fn(f, xs)]: fn(f,xs)
}
const arrEx = [4, 2, 5, 1, 3];
const param = (a) => a === 4
console.log(fn(param, arrEx))
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