红宝石循环和班;再次将字符串分割为一个数组，并返回一个字符串 [英] Ruby loops and classes; splitting a string into an array and back to a string again

问题描述

红宝石新手在这里与类循环工作。我本来是创造，将采取一个字符串，并添加惊叹号每个单词的结尾（通过将其与.split数组），并加入一个方法再次惊呼字作为一个字符串。我已经在这两个小时已经和决定我应该寻求帮助。我有想法了一把，但我一直想出一个NoMethod错误。下面是那对我有意义，但当然，这是行不通的途径之一。我也在最后补充规格。

 类StringModifier
  attr_accessor中：字符串
  高清初始化（字符串）
    @string =字符串
  结束  DEF宣布
    new_array = []
    string.split.each做|字|
      新数组=＃{}字！
        new_array.join
    结束
    new_array
  结束
结束
 

SPECS

 描述StringModifier做
  形容#proclaim吗
    它每一个字后面加上一个感叹号吗
      blitzkrieg_bop = StringModifier.new（嘿嗬走吧）。宣布
      期待（blitzkrieg_bop）。为了EQ（嘿！嗬！我们走！！）
    结束
  结束
结束
 

解决方案

写您的方法：

 宣布高清
  string.split.map {|字| ＃{字}！ }。加入（）
结束
 

还是把它写为：

 宣布高清
  A = string.split
  （％S！* a.size％一）.strip
结束
 

测试：

  [30]撬（主）GT; A =嘿嗬走吧.split
= GT; [嘿我们走吧]
[31]撬（主）GT; （％S！* a.size％一）.strip
= GT; 嘿我们走吧！
[32]撬（主）GT;
 

Ruby newbie here working on loops with classes. I was supposed create a method that would take a string and add exclamation points to the end of each word (by making it an array with .split) and join the 'exclaimed' words as a string again. I've been at this for two hours already and decided I should seek help. I have a handful of ideas but I keep coming up with a NoMethod error. Below is one of ways that made sense to me but of course, it doesn't work. I've also added specs at the very end.

class StringModifier
  attr_accessor :string
  def initialize(string)
    @string = string
  end

  def proclaim
    new_array = []
    string.split.each do |word|
      new array = "#{word}!"
        new_array.join
    end
    new_array
  end
end

SPECS

describe StringModifier do
  describe "#proclaim" do
    it "adds an exclamation mark after each word" do
      blitzkrieg_bop = StringModifier.new("Hey ho let's go").proclaim
      expect(blitzkrieg_bop).to eq("Hey! ho! let's! go!")
    end
  end
end

解决方案

Write your method as:

def proclaim
  string.split.map { |word| "#{word}!" }.join(" ")
end

Or write it as :

def proclaim
  a = string.split
  ("%s! " * a.size % a).strip
end

Tested :

[30] pry(main)> a = "Hey ho let's go".split
=> ["Hey", "ho", "let's", "go"]
[31] pry(main)> ("%s! " * a.size % a).strip
=> "Hey! ho! let's! go!"
[32] pry(main)>

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