Results for: "max_by"

Removes the gemspec matching full_name from the dependency list

Find the best specification matching a name and requirements. Raises if the dependency doesn’t resolve to a valid specification.

Return the best specification that contains the file matching path.

Return the best specification in the record that contains the file matching path.

Remove everything in the DependencyList that matches but doesn’t satisfy items in dependencies (a hash of gem names to arrays of dependencies).

Returns every spec that matches name and optional requirements.

Find the best specification matching a full_name.

Return the best specification that contains the file matching path amongst the specs that are not activated.

Returns every spec in the record that matches name and optional requirements.

Return the best specification in the record that contains the file matching path amongst the specs that are not activated.

Returns every spec that has the given full_name

Return the best specification that contains the file matching path, among those already activated.

Return the best specification in the record that contains the file matching path, among those already activated.

mkmf.rb is used by Ruby C extensions to generate a Makefile which will correctly compile and link the C extension to Ruby and a third-party library.

Raised when a gem dependencies file specifies a ruby version that does not match the current version.

The command manager registers and installs all the individual sub-commands supported by the gem command.

Extra commands can be provided by writing a rubygems_plugin.rb file in an installed gem. You should register your command against the Gem::CommandManager instance, like this:

# file rubygems_plugin.rb
require 'rubygems/command_manager'

Gem::CommandManager.instance.register_command :edit

You should put the implementation of your command in rubygems/commands.

# file rubygems/commands/edit_command.rb
class Gem::Commands::EditCommand < Gem::Command
  # ...
end

See Gem::Command for instructions on writing gem commands.

Raised when encountering Ruby code with an invalid syntax.

eval("1+1=2")

raises the exception:

SyntaxError: (eval):1: syntax error, unexpected '=', expecting $end

MatchData encapsulates the result of matching a Regexp against string. It is returned by Regexp#match and String#match, and also stored in a global variable returned by Regexp.last_match.

Usage:

url = 'https://docs.ruby-lang.org/en/2.5.0/MatchData.html'
m = url.match(/(\d\.?)+/)   # => #<MatchData "2.5.0" 1:"0">
m.string                    # => "https://docs.ruby-lang.org/en/2.5.0/MatchData.html"
m.regexp                    # => /(\d\.?)+/
# entire matched substring:
m[0]                        # => "2.5.0"

# Working with unnamed captures
m = url.match(%r{([^/]+)/([^/]+)\.html$})
m.captures                  # => ["2.5.0", "MatchData"]
m[1]                        # => "2.5.0"
m.values_at(1, 2)           # => ["2.5.0", "MatchData"]

# Working with named captures
m = url.match(%r{(?<version>[^/]+)/(?<module>[^/]+)\.html$})
m.captures                  # => ["2.5.0", "MatchData"]
m.named_captures            # => {"version"=>"2.5.0", "module"=>"MatchData"}
m[:version]                 # => "2.5.0"
m.values_at(:version, :module)
                            # => ["2.5.0", "MatchData"]
# Numerical indexes are working, too
m[1]                        # => "2.5.0"
m.values_at(1, 2)           # => ["2.5.0", "MatchData"]

Global variables equivalence

Parts of last MatchData (returned by Regexp.last_match) are also aliased as global variables:

• $~ is Regexp.last_match;

• $& is Regexp.last_match[ 0 ];

• $1, $2, and so on are Regexp.last_match[ i ] (captures by number);

• $` is Regexp.last_match.pre_match;

• $' is Regexp.last_match.post_match;

• $+ is Regexp.last_match[ -1 ] (the last capture).

See also “Special global variables” section in Regexp documentation.

Raised when attempting to convert special float values (in particular Infinity or NaN) to numerical classes which don’t support them.

Float::INFINITY.to_r   #=> FloatDomainError: Infinity