Let's say we have a string ping. We want to replace the character i with o, making the resulting string pong.
In Ruby, we can use the tr method to do this:
In the above example, we are telling Ruby to replace the character i with o in the string message. The tr method is used to replace characters in a string. The first argument is the character to be replaced, and the second argument is the character to replace it with.
The tr method can also be used to replace multiple characters in a string at once. Look at the following example:
In the above example, we are replacing the characters e and l with i and p respectively. The tr method replaces the first character in the first argument with the first character in the second argument, the second character in the first argument with the second character in the second argument, and so on.