The sub method replaces part of a string with another.
Ruby replace string character.
The find and replace feature in word processors lets you search for a string and replace it with another string.
In other words every character.
If the delimiter passed to string split is a zero length string or regular expression then string split will act a bit differently.
It has multiple uses.
Well that code should work to replace the first underscore in a string.
You can also drop the if statement as it has no effect here.
Ruby allows part of a string to be modified through the use of the method.
The string value has its matching characters replaced according to sub s arguments.
One way to do that is to use the each char method.
Sometimes given a string i need to go over it character by character.
Removing invalid characters by making the 2nd argument an empty string.
Sammy no longer has the balloon.
If the string ends with r n both characters are removed.
At ote puts value value bird this version of sub does not change the string in place.
In the first example we first split the string using the empty string as separator.
Chomp is often a safer alternative as it leaves the string unchanged if it doesn t end in a record separator.
Replacing text in strings.
It will remove nothing at all from the original string and split on every character.
It can easily be done after using splitto cut up the sting or by using the each charmethod.
You can do that in ruby with the sub and gsub methods.
I would use tr for this if you want to replace them all.
Let s change the substring has to had.
Sub ird ark puts value output cote bark.
It s a powerful method that allows you to replace or substitute characters inside a string.
Cal name tr james edward g.
Applying chop to an empty string returns an empty string.
If you want all of them use gsub instead.
Sometimes it s useful to work with the individual characters of a string.
Rubyguides each char ch puts ch you can also use the chars method to convert the string into an array of characters.
Mystring welcome to javascript.
Changing a section of a string.
Returns a new string with the last character removed.
This essentially turns the string into an array of equal length containing only one character strings one for each character in the string.
Iterate over characters of a string in ruby.
To use this method simply pass through the string of characters to be replaced to the method and assign the new string.
You have learned about the gsub method in ruby.
