给定长度不同的字符串数组，如何用相同的单词替换每个字符串

Question

I have to replace a number of strings with the same word, lets say that word is "plum".

An example could be... "This is a string" and expected output would be "plum plum plum plum" or "I'm happy" output "plum plum"

So far I have converted the string into an array, mapped and counted using...

string = sentence.split(&:map).to_a
n = string.count.to_i

I am now trying to replace each string in the array using sentence.gsub[0..n] which I expected to replace each position in the array with my word.

I'm sure this is not the best way to do this, however I would really appreciate help on this particular method to help my understanding of where I've gone wrong in my thinking as well as finding out that I could have done it with far cleaner code

Answer 1

You can try this way:

"This is a string".split.map { "plum" }.join(" ")
=> "plum plum plum plum"

Or by using gsub :

"This is a string".gsub(/[^\s]+/, "plum")
=> "plum plum plum plum"

Answer 2

You can just repeat "plum" as many times as you have words...

sentence = "This is a string"
("plum " * sentence.split.count).strip
=> "plum plum plum plum"