gem 'mightystring', '~> 1.0'

gem install mightystring

# String#at
"abc".at(0)
# => "a"
"0123456789".at(-1)
# => "9"
"vwq".at(5)
# => nil

# String#del
"asdfasdf".del(0..2)
# => "fasdf"
"asdfasdf".del(1)
# => "adfasdf"
"asdfasdf".del([1,3])
# => "adasdf"
"asdfasdf".del("a")
# => "sdfsdf"

# String#del!
str = "asdfasdf"
str.del!("sd")
str
# => "afaf"
str.del!(1..2)
str
# => "af"

# String#first
"asdf".first
# => "a"

# String#last
"asdf".last
# => "f"

# String#pop
"asdf".pop
# => "f"

# String#push
"asdf".push("r")
# => "asdfr"

# String#shift
"asdf".shift
# => "a"

# String#sort
str = "asdf"
str.sort
# => "adfs"
str
# => "asdf"

# String#sort!
str = "asdf"
str.sort!
# => "adfs"
str
# => "adfs"

# String#unshift
"asdf".unshift("r")
# => "rasdf"

# String#values_at
"asdfasdfasdf".values_at(0,5,-1)
# => ["a", "s", "f"]

# String#index_all
"012324507654301243".index_all( "0" )
# => [0,7,13]
"the apple is the best fruit in the world".index_all( "the" )
# => [0, 13, 31]
"asdfasdfasdf".index_all( /sd/ )
# => [1,5,9]

# String#sift
"qwertyuiop".sift( "aeiou" )
# => "euio"
"qa2ws3ed4rf5tg6yh7uj8ik9ol".sift( Range.new( "0", "9" ) )
# => "23456789"

# String#head
"asdf".head
# => "a"
"asdf".head(3)
# => "asd"

# String#tail
"asdf".tail
# => "sdf"
"asdf".tail(3)
# => "f"

# String#bhead and String#bisect_head
"asdf".bhead
# => ["a", "sdf"]
"asdf".bhead(3)
# => ["asd", "f"]

# String#btail and String#bisect_tail
"asdf".btail
# => ["sdf", "a"]
"asdf".btail(3)
# => ["f", "asd"]