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 vote235 views1 answer
Start rails server on different port
Ruby
0 vote269 views1 answer
If the version you need is missing, try upgrading ruby-build. linux
Ruby
0 vote158 views3 answers
Font awesome in submit tag rails simple form for
Ruby
0 vote233 views1 answer
Ruby sinatra helper
Ruby
0 vote220 views1 answer
Object service
Ruby
0 vote405 views1 answer
Name error on ruby
Ruby
1 vote214 views2 answers
Get input from user in ruby
Ruby
0 vote233 views1 answer
Rails scope where not
Ruby
1 vote211 views1 answer
Ruby file get line number
Ruby
2 votes223 views1 answer
Ruby reorder keys in hash
Ruby