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挑戰 Codewars LV6 題目

題目：

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.

#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 []

def in_array(array1, array2)
  ...
end

a1 = ["arp", "live", "strong"]
a2 = ["lively", "alive", "harp", "sharp", "armstrong"]
Test.assert_equals(in_array(a1, a2), ["arp", "live", "strong"])
a1 = ["tarp", "mice", "bull"]
Test.assert_equals(in_array(a1, a2), [])

影片解題：

答案：

def in_array(array1, array2)
  array1.select{|x| array2.any?{|y| y.include?(x)}}.sort
end

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