Returns a new ipaddr built by converting the native IPv4 address into an IPv4-mapped IPv6 address.
Set date-time format.
datetime_format
A string suitable for passing to strftime.
Returns the date format being used. See datetime_format=
Hadamard product
Matrix[[1,2], [3,4]].hadamard_product(Matrix[[1,2], [3,2]])
=> 1 4
9 8
Explicit conversion to a Matrix. Returns self
Return a single-column matrix from this vector
Creates an OptionParser::Switch from the parameters. The parsed argument value is passed to the given block, where it can be processed.
See at the beginning of OptionParser for some full examples.
opts can include the following elements:
One of the following:
:NONE, :REQUIRED, :OPTIONAL
Acceptable option argument format, must be pre-defined with OptionParser.accept or OptionParser#accept, or Regexp. This can appear once or assigned as String if not present, otherwise causes an ArgumentError. Examples:
Float, Time, Array
[:text, :binary, :auto] %w[iso-2022-jp shift_jis euc-jp utf8 binary] { "jis" => "iso-2022-jp", "sjis" => "shift_jis" }
Specifies a long style switch which takes a mandatory, optional or no argument. It’s a string of the following form:
"--switch=MANDATORY" or "--switch MANDATORY" "--switch[=OPTIONAL]" "--switch"
Specifies short style switch which takes a mandatory, optional or no argument. It’s a string of the following form:
"-xMANDATORY" "-x[OPTIONAL]" "-x"
There is also a special form which matches character range (not full set of regular expression):
"-[a-z]MANDATORY" "-[a-z][OPTIONAL]" "-[a-z]"
Instead of specifying mandatory or optional arguments directly in the switch parameter, this separate parameter can be used.
"=MANDATORY" "=[OPTIONAL]"
Description string for the option.
"Run verbosely"
If you give multiple description strings, each string will be printed line by line.
Handler for the parsed argument value. Either give a block or pass a Proc or Method as an argument.
Returns the portion of the original string before the current match. Equivalent to the special variable $`.
m = /(.)(.)(\d+)(\d)/.match("THX1138.") m.pre_match #=> "T"
Returns the portion of the original string after the current match. Equivalent to the special variable $'.
m = /(.)(.)(\d+)(\d)/.match("THX1138: The Movie") m.post_match #=> ": The Movie"
This is similar to PrettyPrint::format but the result has no breaks.
maxwidth, newline and genspace are ignored.
The invocation of breakable in the block doesn’t break a line and is treated as just an invocation of text.
Convenience method for Shell::CommandProcessor.alias_command. Defines an instance method which will execute a command under an alternative name.
Shell.def_system_command('date') Shell.alias_command('date_in_utc', 'date', '-u') Shell.new.date_in_utc # => Sat Jan 25 16:59:57 UTC 2014
Convenience method for Shell::CommandProcessor.unalias_command
Returns a new array with the concatenated results of running block once for every element in enum.
If no block is given, an enumerator is returned instead.
[1, 2, 3, 4].flat_map { |e| [e, -e] } #=> [1, -1, 2, -2, 3, -3, 4, -4] [[1, 2], [3, 4]].flat_map { |e| e + [100] } #=> [1, 2, 100, 3, 4, 100]
Returns the number of malloc() allocations.
Only available if ruby was built with CALC_EXACT_MALLOC_SIZE.
The version of the Marshal format for your Ruby.
Returns whether or not macro is defined either in the common header files or within any headers you provide.
Any options you pass to opt are passed along to the compiler.
creates a stub Makefile.
Generates the Makefile for your extension, passing along any options and preprocessor constants that you may have generated through other methods.
The target name should correspond the name of the global function name defined within your C extension, minus the Init_. For example, if your C extension is defined as Init_foo, then your target would simply be “foo”.
If any “/” characters are present in the target name, only the last name is interpreted as the target name, and the rest are considered toplevel directory names, and the generated Makefile will be altered accordingly to follow that directory structure.
For example, if you pass “test/foo” as a target name, your extension will be installed under the “test” directory. This means that in order to load the file within a Ruby program later, that directory structure will have to be followed, e.g. require 'test/foo'.
The srcprefix should be used when your source files are not in the same directory as your build script. This will not only eliminate the need for you to manually copy the source files into the same directory as your build script, but it also sets the proper target_prefix in the generated Makefile.
Setting the target_prefix will, in turn, install the generated binary in a directory under your RbConfig::CONFIG['sitearchdir'] that mimics your local filesystem when you run make install.
For example, given the following file tree:
ext/ extconf.rb test/ foo.c
And given the following code:
create_makefile('test/foo', 'test')
That will set the target_prefix in the generated Makefile to “test”. That, in turn, will create the following file tree when installed via the make install command:
/path/to/ruby/sitearchdir/test/foo.so
It is recommended that you use this approach to generate your makefiles, instead of copying files around manually, because some third party libraries may depend on the target_prefix being set properly.
The srcprefix argument can be used to override the default source directory, i.e. the current directory. It is included as part of the VPATH and added to the list of INCFLAGS.
Sets the minimum and maximum supported protocol versions. See min_version= and max_version=.
Returns true if the file or directory may be renamed by RNFR.