[英]How to get two arrays by mapping a predicate over an input array with Ramda
有沒有一種簡潔的方法來實現與以下相同的結果,但是:
我考慮過使用reduce更新包含傳遞/失敗數組的累加器對象,但是我不確定是否有一個更聰明/更詳細的選項
const predicate = i => i % 2 === 0;
const predicatePassed = [];
const predicateFailed = [];
[1, 2, 3, 4].forEach(i => predicate(i) ? predicatePassed.push(i) : predicateFailed.push(i))
// predicatePassed === [2, 4]
// predicateFailed === [1, 3]
您可以使用R.partition :
const predicate = i => i % 2 === 0; const [predicatePassed, predicateFailed] = R.partition(predicate)([1, 2, 3, 4]); console.log(predicatePassed); console.log(predicateFailed);
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