将输出存储到Ruby中的数组中

  • Z时代
  • 2024-01-10
  • 分类：问答

所以我需要创建一个方法，它接收一个名称数组并输出一组字符串。我如何将输出存储到数组中？所以，而不是有一个名称数组我有一个问候数组？将输出存储到Ruby中的数组中

def badge_maker(array)  
    array.each do |i|  
    counter = 0  
    while counter < 7  
     array[counter] << "Hello, my name is #{i}."  
     counter += i  
    end  
    return array  
    end  
end  
arrayOne = ["Edsger","Ada","Charles","Alan","Grace","Linus","Matz"]  
badge_maker(arrayOne)

回答：

这是未经测试，但应该做的伎俩：

def badge_maker(names) 
    greetings = [] # initialize greetings as an empty array 
    names.each do |name| # for each name in the names array 
    greetings << "Hello, my name is #{name}." # add a greeting for that name 
    end 
    return greetings # return the array of all greetings, at the end 
end 
arrayOne = ["Edsger","Ada","Charles","Alan","Grace","Linus","Matz"] 
badge_maker(arrayOne)

或者，如果你想真正改造原有的阵列，而不是创建一个新的数组的问候，然后这样做：

def badge_maker(names) 
    names.map! do |name| # for each name in the names array 
    "Hello, my name is #{name}." # convert it to a greeting for that name 
    end 
end 
arrayOne = ["Edsger","Ada","Charles","Alan","Grace","Linus","Matz"] 
badge_maker(arrayOne) 
# now, arrayOne will contain an array of greetings, not names

回答：

你c如果您想修改原始数组，请使用map!。但是 - 无论您如何处理它 - 像each或map这样的迭代方法都是您的朋友，因为它隐式处理了集合中元素的数量。

def badge_maker(array) 
    array.map! do |el| 
    "Hello " + el 
    end 
end 
array_one = ["Edsger","Ada","Charles","Alan","Grace","Linus","Matz"] 
badge_maker(array_one) 
puts array_one 
#=> Hello Edsger 
#=> Hello Ada 
#=> Hello Charles 
#=> Hello Alan 
#=> Hello Grace 
#=> Hello Linus 
#=> Hello Matz

回答：

您可以使用Array#product，Enumerable#map和Array#join。

arr = ["Edsger","Ada","Charles","Alan","Grace","Linus","Matz"] 
["How 'ya doin, "].product(arr).map(&:join) 
    #=> ["How 'ya doin, Edsger", "How 'ya doin, Ada", "How 'ya doin, Charles", 
    # "How 'ya doin, Alan", "How 'ya doin, Grace", "How 'ya doin, Linus", 
    # "How 'ya doin, Matz"]

以上是 将输出存储到Ruby中的数组中 的全部内容， 来源链接： utcz.com/qa/259945.html

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