通過與空格的字符串迭代

Question

我有一個字符串：results = "123 456 "

我想通過串並打印迭代：「1,2,3，，4,5,6，」

這是我到目前爲止的代碼：

results.each do |k| 
    print k, "," 
end 

我也試過使用each_char。

Answer 1

這應該工作：

results.split('').join(',') 
# => "1,2,3, ,4,5,6, " 

Answer 2

results.each_char.map 
# => ["1", "2", "3", " ", "4", "5", "6", " "] 

或者，如果你想有一個字符串作爲輸出：

result.each_char.map.join(',') 
# => "1,2,3, ,4,5,6, " 

Answer 3

each_char作品對我來說：

results = "123 456 " 
results.each_char do |char| 
    print "#{char}," 
end 

輸出：

1,2,3, ,4,5,6, , 

Answer 4

"123 456 ".gsub(/(?<!\A)(?!\z)/, ",") 
# => "1,2,3, ,4,5,6, "