如何使用Ruby在将每个字符打印成字符串之前进行延迟

Question

Does anyone know how to create a small delay (perhaps 0.1 seconds) between the printing of each character in a string in Ruby?

I have tried some other methods (shown below); however, I'm certain that a simpler method exists as the method im using is time (and space) consuming:

#ugly/boring method vvv

print "h"
sleep 0.1
print "e"
sleep 0.1
print "l"
sleep 0.1
print "l"
sleep 0.1
print "o"

I have done some research on the topic and found a method under C and php but no one seems to have an answer for Ruby.

Thanks in advance for the help.

Answer 1

"hello".each_char do |c|
  sleep 0.1
  print c
end

Docs: String#each_char

You could also monkey-patch the string class:

class String
  def print_slowly
    self.each_char do |c|
      sleep 0.1
      print c
    end
  end
end

#usage
"hello".print_slowly

Answer 2

A super simple approach would be something like this:

"hello".split(//).each do |c|
  sleep 0.1 
  print c
end

Here's a more verbose explanation:

string = "hello"
split_that_string = string.split(//);

for character in split_that_string
   sleep 0.1
   print character
end

You could also make a method for it:

def print_a_string_one_character_at_a_time(string)
  array_of_characters = string.split(//);
  for character in array_of_characters
    sleep 0.1
    print character
  end
end 

and then you can pass any string to that method. Here's an example:

print_a_string_one_character_at_a_time("Hello, World!")

That will type out Hello, World! one character at a time (and return the array of characters).