javascript - codewars的一道题,搞不懂
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问题描述
问 题
题目:
Given two arrays of strings a1 and a2 return a sorted array r in lexicographical order of the strings of a1 which are substrings of strings of a2.
例子:
Example 1:
a1 = ["arp", "live", "strong"]
a2 = ["lively", "alive", "harp", "sharp", "armstrong"]
returns ["arp", "live", "strong"]
Example 2:
a1 = ["tarp", "mice", "bull"]
a2 = ["lively", "alive", "harp", "sharp", "armstrong"]
returns []
要求:
要求实现function inArray(array1,array2){}
测试用例:
a2 = ["lively", "alive", "harp", "sharp", "armstrong"]
a1 = ["xyz", "live", "strong"]
Test.assertSimilar(inArray(a1, a2), ["live", "strong"])
a1 = ["live", "strong", "arp"]
Test.assertSimilar(inArray(a1, a2), ["arp", "live", "strong"])
a1 = ["tarp", "mice", "bull"]
Test.assertSimilar(inArray(a1, a2), [])
解决方案
供参考:
function inArray(a1, a2){
return a1.filter(el_a1 => a2.find(el_a2 => el_a2.includes(el_a1))).sort();
}
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