Ruby 获取句子中最长的单词 [英] Ruby getting the longest word of a sentence

问题描述

我正在尝试创建名为 longest_word 的方法，该方法将句子作为参数，该函数将返回句子中最长的单词.

I'm trying to create method named longest_word that takes a sentence as an argument and The function will return the longest word of the sentence.

我的代码是:

def longest_word(str)
  words = str.split(' ')
  longest_str = []
  return longest_str.max
end

推荐答案

这取决于您想如何拆分字符串.如果您对使用单个空间感到满意，则可以这样做:

It depends on how you want to split the string. If you are happy with using a single space, than this works:

def longest(source)
  arr = source.split(" ")
  arr.sort! { |a, b| b.length <=> a.length }
  arr[0]
end

否则，请使用正则表达式来捕获空格和标点符号.

Otherwise, use a regular expression to catch whitespace and puntuaction.

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