Check if gem name version version is installed.
True if the requested gem has already been installed.
Installing a git gem only involves building the extensions and generating the executables.
This is a null install as this specification is already installed. options are ignored.
This is a null install as a locked specification is considered installed. options are ignored.
Installs this specification using the Gem::Installer options. The install method yields a Gem::Installer instance, which indicates the gem will be installed, or nil, which indicates the gem is already installed.
After installation spec is updated to point to the just-installed specification.
This is a null install as this gem was unpacked into a directory. options are ignored.
Starts tracing object allocations.
Calls the constructed Function, with args. Caller must ensure the underlying function is called in a thread-safe manner if running in a multi-threaded process.
For an example see Fiddle::Function
Allocates a C struct with the types provided.
When the instance is garbage collected, the C function func is called.
Allocates a C union the types provided.
When the instance is garbage collected, the C function func is called.
Fiddle::Pointer.malloc(size, freefunc = nil) => fiddle pointer instance
Allocate size bytes of memory and associate it with an optional freefunc that will be called when the pointer is garbage collected.
freefunc must be an address pointing to a function or an instance of Fiddle::Function
Logs a message at the fatal (syslog err) log level, or logs the message returned from the block.
Returns all specifications. This method is discouraged from use. You probably want to use one of the Enumerable methods instead.
Sets the known specs to specs. Not guaranteed to work for you in the future. Use at your own risk. Caveat emptor. Doomy doom doom. Etc etc.
Shortcut for logging a FATAL message
Will the logger output FATAL messages?
Returns true if the named file is writable by the real user and group id of this process. See access(3)
Returns true if the named file is executable by the real user and group id of this process. See access(3).
Returns true if the given ordinal date is valid, and false if not.
Date.valid_ordinal?(2001,34) #=> true Date.valid_ordinal?(2001,366) #=> false
Returns true if the given week date is valid, and false if not.
Date.valid_commercial?(2001,5,6) #=> true Date.valid_commercial?(2001,5,8) #=> false
See also ::jd and ::commercial.