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摘要： JavaScript const includesAll = (big, small) => small.every(s => big.includes(s)) Examples includesAll([1, 2, 3, 4], [1, 4]) // true includesAll([1, 2, 阅读全文

摘要： JavaScript const includesAny = (arr1, arr2) => arr2.some(i2 => arr1.includes(i2)) Examples includesAny([1, 2, 3, 4], [2, 9]) // true includesAny([1, 2 阅读全文

摘要： JavaScript const union = (a, b) => Array.from(new Set([...a, ...b])) Examples union([1, 2, 3], [4, 3, 2]) // [1, 2, 3, 4] 阅读全文

摘要： loops 循环 const files = ['foo.txt ', '.bar', ' ', 'baz.foo'] let filePaths = [] for (let file of files) { const fileName = file.trim() if (fileName) { 阅读全文

摘要： let arr = [1, 2, 3, 3] let res = arr.reduce((prev, cur) => { prev.indexOf(cur) == -1 && prev.push(cur) return prev }, []) // [1, 2, 3] 阅读全文