Ruby | String gsub Method

gsub is a String class method in Ruby which is used to return a copy of the given string with all occurrences of pattern substituted for the second argument.

Syntax: str.gsub(pattern, replacement)

Parameters: Here, str is the given string. pattern may be specified regex or character set to be removed. replacement is the set of characters which is to be put.

Returns:A copy of the string with all occurrences of pattern substituted for the second argument.

Example 1:

# Ruby program to demonstrate
# the gsub method

# Taking a string and
# using the method
puts "Sample".gsub(/[amuyt]/, '*')
puts "Program".gsub(/([gmra])/, '<\1>')

Output:

S**ple
Po

Example 2:

# Ruby program to demonstrate
# the gsub method

# Taking a string and
# using the method
puts "Ruby".gsub(/[tyru]/, '<\1>')
puts "String".gsub(/([igtr])/, '*')

Output:

Rb
S***n*