我如何才能找到一个多维数组中最长的字符串？ [英] How can I find the longest string in a multi-dimensional array?

问题描述

我试图让从多维数组中最长的字符串，但它是不工作的某些原因。

这是我有：

  A =
[MAKKGKPRPDHRPPA​​HNPHYAHDPPPYSQQQPPLQQQNYAQQMNRQHARPRPSPPSEVSDCVKYSLFLYNCIFWVSMHSS]，
[MHHGGGGGNRQHARPRPSPPSEVSDCVKYSLFLYNCIFWVSMHSS]，[MTYINLGVTRTGDLMIGRHRP]，
[MRIYNRVCFQTAGCYLQNLVTTSIQPARVWTY]，[MAACGLGRVFSAFKVDEMD]，
[MPSGFVGKRSGFCQFCCSHI]，[MTYSTAKEGAYPFRNFN]]p {a.max_by | V | V} [0]＃=＆GT; MTYSTAKEGAYPFRNFN
 

可能有人请让我知道我做错了？

解决方案

  =＆GT; a.flatten.max_by（安培;：大小）
= GT; ＃MAKKGKPRPDHRPPA​​HNPHYAHDPPPYSQQQPPLQQQNYAQQMHHGGGGGNRQHARPRPSPPSEVSDCVKYSLFLYNCIFWVSMHSS
 

I am trying to get the longest string from an multidimensional array, however it is not working for some reason.

This is what I have:

a = 
["MAKKGKPRPDHRPPAHNPHYAHDPPPYSQQQPPLQQQNYAQQMNRQHARPRPSPPSEVSDCVKYSLFLYNCIFWVSMHSS"],
["MHHGGGGGNRQHARPRPSPPSEVSDCVKYSLFLYNCIFWVSMHSS"], ["MTYINLGVTRTGDLMIGRHRP"],
["MRIYNRVCFQTAGCYLQNLVTTSIQPARVWTY"], ["MAACGLGRVFSAFKVDEMD"], 
["MPSGFVGKRSGFCQFCCSHI"], ["MTYSTAKEGAYPFRNFN"]]

p a.max_by{|v|v}[0]  # => "MTYSTAKEGAYPFRNFN"

Could someone please let me know what I am doing wrong?

解决方案

=> a.flatten.max_by(&:size)
=> # "MAKKGKPRPDHRPPAHNPHYAHDPPPYSQQQPPLQQQNYAQQMHHGGGGGNRQHARPRPSPPSEVSDCVKYSLFLYNCIFWVSMHSS"

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