Returns a new vector with the same direction but with norm 1.
v = Vector[5,8,2].normalize # => Vector[0.5184758473652127, 0.8295613557843402, 0.20739033894608505] v.norm => 1.0
Terminates option parsing. Optional parameter arg is a string pushed back to be the first non-option argument.
Puts option summary into to and returns to. Yields each line if a block is given.
to
Output destination, which must have method <<. Defaults to [].
width
Width of left side, defaults to @summary_width.
max
Maximum length allowed for left side, defaults to width - 1.
indent
Indentation, defaults to @summary_indent.
Add separator in summary.
Searches key in @stack for id hash and returns or yields the result.
Iterates the given block over all prime numbers.
ubound
Optional. An arbitrary positive number. The upper bound of enumeration. The method enumerates prime numbers infinitely if ubound is nil.
generator
Optional. An implementation of pseudo-prime generator.
An evaluated value of the given block at the last time. Or an enumerator which is compatible to an Enumerator if no block given.
Calls block once for each prime number, passing the prime as a parameter.
ubound
Upper bound of prime numbers. The iterator stops after it yields all prime numbers p <= ubound.
Returns the path to the data store file.
Returns a string containing the character represented by the int‘s value according to encoding.
65.chr #=> "A" 230.chr #=> "\346" 255.chr(Encoding::UTF_8) #=> "\303\277"
Returns the smallest number than or equal to int in decimal digits (default 0 digits).
Precision may be negative. Returns a floating point number when ndigits is positive, self for zero, and truncate up for negative.
1.truncate #=> 1 1.truncate(2) #=> 1.0 15.truncate(-1) #=> 10
Returns the remainder after dividing big by numeric as:
x.remainder(y) means x-y*(x/y).truncate
Examples
5.remainder(3) #=> 2 -5.remainder(3) #=> -2 5.remainder(-3) #=> 2 -5.remainder(-3) #=> -2 -1234567890987654321.remainder(13731) #=> -6966 -1234567890987654321.remainder(13731.24) #=> -9906.22531493148
See Numeric#divmod.
Returns the absolute value of int.
-12345.abs #=> 12345 12345.abs #=> 12345 -1234567890987654321.abs #=> 1234567890987654321
Returns self.
Returns 1.
Returns the value as a rational. The optional argument eps is always ignored.
Returns a new set that is a copy of the set, flattening each containing set recursively.
Equivalent to Set#flatten, but replaces the receiver with the result in place. Returns nil if no modifications were made.
Calls the given block once for each element in the set, passing the element as parameter. Returns an enumerator if no block is given.
Creates a Shell object which current directory is set to path.
If a block is given, it restores the current directory when the block ends.
If called as iterator, it restores the current directory when the block ends.
Returns the full path name of the temporary file. This will be nil if unlink has been called.
Creates a temporary file as usual File object (not Tempfile). It doesn’t use finalizer and delegation.
If no block is given, this is similar to Tempfile.new except creating File instead of Tempfile. The created file is not removed automatically. You should use File.unlink to remove it.
If a block is given, then a File object will be constructed, and the block is invoked with the object as the argument. The File object will be automatically closed and the temporary file is removed after the block terminates. The call returns the value of the block.
In any case, all arguments (+*args+) will be treated as Tempfile.new.
Tempfile.create('foo', '/home/temp') do |f|
... do something with f ...
end
Returns the main thread.
Terminates thr and schedules another thread to be run.
If this thread is already marked to be killed, exit returns the Thread.
If this is the main thread, or the last thread, exits the process.