### Home Classes Methods

### In Files

- lib/mail/core_extensions/string/access.rb
- lib/mail/core_extensions/shell_escape.rb
- lib/mail/core_extensions/string.rb

### Parent

Object

### Methods

- #at
- #constantize
- #escape_for_shell
- #first
- #from
- #last
- #to

### Files

- TODO.rdoc
- VERSION

### Class/Module Index

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- Mail::TestMailer
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- Mail::Utilities
- Mail::VERSION
- Net
- Net::SMTP
- Object
- String

No matching classes.

# String

This is an almost cut and paste from ActiveSupport v3.0.6, copied in here so that Mail itself does not depend on ActiveSupport to avoid versioning conflicts

### Public Instance Methods

at(position) click to toggle source

Returns the character at the `position` treating the string as an array (where 0 is the first character).

Examples:

    "hello".at(0)  # => "h"
    "hello".at(4)  # => "o"
    "hello".at(10) # => ERROR if < 1.9, nil in 1.9

    # File lib/mail/core_extensions/string/access.rb, line 15
    def at(position)
      mb_chars[position, 1].to_s
    end

constantize() click to toggle source

Tries to find a constant with the name specified in the argument string:

    "Module".constantize     # => Module
    "Test::Unit".constantize # => Test::Unit

The name is assumed to be the one of a top-level constant, no matter whether it starts with "::" or not. No lexical context is taken into account:

    C = 'outside'
    module M
      C = 'inside'
      C               # => 'inside'
      "C".constantize # => 'outside', same as ::C
    end

NameError is raised when the name is not in CamelCase or the constant is unknown.

    # File lib/mail/core_extensions/string/access.rb, line 122
    def constantize
      names = self.split('::')
      names.shift if names.empty? || names.first.empty?

      constant = Object
      names.each do |name|
        constant = constant.const_defined?(name) ? constant.const_get(name) : constant.const_missing(name)
      end
      constant
    end

shellescape => string click to toggle source

Escapes `str` so that it can be safely used in a Bourne shell command line. See +Shellwords::shellescape+ for details.

    # File lib/mail/core_extensions/shell_escape.rb, line 52
    def escape_for_shell
      Mail::ShellEscape.escape_for_shell(self)
    end

first(limit = 1) click to toggle source

Returns the first character of the string or the first `limit` characters.

Examples:

    "hello".first     # => "h"
    "hello".first(2)  # => "he"
    "hello".first(10) # => "hello"

    # File lib/mail/core_extensions/string/access.rb, line 45
    def first(limit = 1)
      if limit == 0
        ''
      elsif limit >= size
        self
      else
        mb_chars[0...limit].to_s
      end
    end

from(position) click to toggle source

Returns the remaining of the string from the `position` treating the string as an array (where 0 is the first character).

Examples:

    "hello".from(0)  # => "hello"
    "hello".from(2)  # => "llo"
    "hello".from(10) # => "" if < 1.9, nil in 1.9

    # File lib/mail/core_extensions/string/access.rb, line 25
    def from(position)
      mb_chars[position..-1].to_s
    end

last(limit = 1) click to toggle source

Returns the last character of the string or the last `limit` characters.

Examples:

    "hello".last     # => "o"
    "hello".last(2)  # => "lo"
    "hello".last(10) # => "hello"

    # File lib/mail/core_extensions/string/access.rb, line 61
    def last(limit = 1)
      if limit == 0
        ''
      elsif limit >= size
        self
      else
        mb_chars[(-limit)..-1].to_s
      end
    end

to(position) click to toggle source

Returns the beginning of the string up to the `position` treating the string as an array (where 0 is the first character).

Examples:

    "hello".to(0)  # => "h"
    "hello".to(2)  # => "hel"
    "hello".to(10) # => "hello"

    # File lib/mail/core_extensions/string/access.rb, line 35
    def to(position)
      mb_chars[0..position].to_s
    end

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