Question

考虑到很长的颜色列表，现在让我们说3：

["red", "green", "blue"]

如何迭代字符串并执行以下操作，匹配XXXX并为每种颜色类型返回一个字符串

sentences = Array.new
master_sentence = "This is a XXXX ball"

sa.push("This is a XXXX ball")

现在句子包含：

"This is a red ball"
"This is a green ball"
"This is a blue ball"

由于

Answer 1

您可以使用map进行迭代：

array = ["red", "green", "blue"]
master_sentence = "This is a XXXX ball"

array.map {|color| master_sentence.gsub(/XXXX/, color)}
=> ["This is a red ball", 
    "This is a green ball", 
    "This is a blue ball"]

Answer 2

这样的东西？

 a = ["red", "green", "blue"]
=> ["red", "green", "blue"]
 a.map{|x| "This is a #{x} ball"}
=> ["This is a red ball", "This is a green ball", "This is a blue ball"]

给定动态变量列表如何构建数组？

2 个答案: