Ruby on Rails ActiveSupport Core Extensions: String Access
Example
String#at
Returns a substring of a string object. Same interface as String#[].
str = "hello" str.at(0) # => "h" str.at(1..3) # => "ell" str.at(-2) # => "l" str.at(-2..-1) # => "lo" str.at(5) # => nil str.at(5..-1) # => ""
String#from
Returns a substring from the given position to the end of the string.
str = "hello" str.from(0) # => "hello" str.from(3) # => "lo" str.from(-2) # => "lo"
String#to
Returns a substring from the beginning of the string to the given position.
If the position is negative, it is counted from the end of the string.
str = "hello" str.to(0) # => "h" str.to(3) # => "hell" str.to(-2) # => "hell"
from and to can be used in tandem.
str = "hello" str.from(0).to(-1) # => "hello" str.from(1).to(-2) # => "ell"
String#first
Returns the first character, or a given number of characters up to the length of the string.
str = "hello" str.first # => "h" str.first(1) # => "h" str.first(2) # => "he" str.first(0) # => "" str.first(6) # => "hello"
String#last
Returns the last character, or a given number of characters from the end of the string counting backwards.
str = "hello" str.last # => "o" str.last(1) # => "o" str.last(2) # => "lo" str.last(0) # => "" str.last(6) # => "hello"
