Returns additional info.
Returns the Ruby
source filename and line number of the binding object.
Returns the location where the Proc
was defined. The returned Array
contains:
(1) the Ruby source filename (2) the line number where the definition starts (3) the column number where the definition starts (4) the line number where the definition ends (5) the column number where the definitions ends
This method will return nil
if the Proc
was not defined in Ruby
(i.e. native).
Returns the location where the method was defined. The returned Array
contains:
(1) the Ruby source filename (2) the line number where the definition starts (3) the column number where the definition starts (4) the line number where the definition ends (5) the column number where the definitions ends
This method will return nil
if the method was not defined in Ruby
(i.e. native).
Returns the location where the method was defined. The returned Array
contains:
(1) the Ruby source filename (2) the line number where the definition starts (3) the column number where the definition starts (4) the line number where the definition ends (5) the column number where the definitions ends
This method will return nil
if the method was not defined in Ruby
(i.e. native).
Returns the execution stack for the target thread—an array containing backtrace location objects.
See Thread::Backtrace::Location
for more information.
This method behaves similarly to Kernel#caller_locations
except it applies to a specific thread.
Returns the exception raised on the :raise
event or rescued on the :rescue
event.
Returns the original line from source for from the given object
.
See ::trace_object_allocations
for more information and examples.
Returns true
if method mid
accepts the given option opt
, false
otherwise; the arguments may be strings or symbols:
FileUtils.have_option?(:chmod, :noop) # => true FileUtils.have_option?('chmod', 'secure') # => false
Returns an array of the string keyword name for method mid
; the argument may be a string or a symbol:
FileUtils.options_of(:rm) # => ["force", "noop", "verbose"] FileUtils.options_of('mv') # => ["force", "noop", "verbose", "secure"]
Returns whether or not the function func
can be found in the common header files, or within any headers
that you provide. If found, a macro is passed as a preprocessor constant to the compiler using the function name, in uppercase, prepended with HAVE_
.
To check functions in an additional library, you need to check that library first using have_library()
. The func
shall be either mere function name or function name with arguments.
For example, if have_func('foo')
returned true
, then the HAVE_FOO
preprocessor macro would be passed to the compiler.
Returns a 2-element array [q, r]
, where
q = (self/other).floor # Quotient r = self % other # Remainder
Examples:
11.divmod(4) # => [2, 3] 11.divmod(-4) # => [-3, -1] -11.divmod(4) # => [-3, 1] -11.divmod(-4) # => [2, -3] 12.divmod(4) # => [3, 0] 12.divmod(-4) # => [-3, 0] -12.divmod(4) # => [-3, 0] -12.divmod(-4) # => [3, 0] 13.divmod(4.0) # => [3, 1.0] 13.divmod(Rational(4, 1)) # => [3, (1/1)]
Returns a 2-element array [q, r]
, where
q = (self/other).floor # Quotient r = self % other # Remainder
Of the Core and Standard Library classes, only Rational
uses this implementation.
Examples:
Rational(11, 1).divmod(4) # => [2, (3/1)] Rational(11, 1).divmod(-4) # => [-3, (-1/1)] Rational(-11, 1).divmod(4) # => [-3, (1/1)] Rational(-11, 1).divmod(-4) # => [2, (-3/1)] Rational(12, 1).divmod(4) # => [3, (0/1)] Rational(12, 1).divmod(-4) # => [-3, (0/1)] Rational(-12, 1).divmod(4) # => [-3, (0/1)] Rational(-12, 1).divmod(-4) # => [3, (0/1)] Rational(13, 1).divmod(4.0) # => [3, 1.0] Rational(13, 1).divmod(Rational(4, 11)) # => [35, (3/11)]
Returns a 2-element array [q, r]
, where
q = (self/other).floor # Quotient r = self % other # Remainder
Examples:
11.0.divmod(4) # => [2, 3.0] 11.0.divmod(-4) # => [-3, -1.0] -11.0.divmod(4) # => [-3, 1.0] -11.0.divmod(-4) # => [2, -3.0] 12.0.divmod(4) # => [3, 0.0] 12.0.divmod(-4) # => [-3, 0.0] -12.0.divmod(4) # => [-3, -0.0] -12.0.divmod(-4) # => [3, -0.0] 13.0.divmod(4.0) # => [3, 1.0] 13.0.divmod(Rational(4, 1)) # => [3, 1.0]
Changes permission bits on the named file(s) to the bit pattern represented by mode_int. Actual effects are operating system dependent (see the beginning of this section). On Unix systems, see chmod(2)
for details. Returns the number of files processed.
File.chmod(0644, "testfile", "out") #=> 2
Equivalent to File::chmod
, but does not follow symbolic links (so it will change the permissions associated with the link, not the file referenced by the link). Often not available.
Changes permission bits on file to the bit pattern represented by mode_int. Actual effects are platform dependent; on Unix systems, see chmod(2)
for details. Follows symbolic links. Also see File#lchmod.
f = File.new("out", "w"); f.chmod(0644) #=> 0
Creates an infinite enumerator from any block, just called over and over. The result of the previous iteration is passed to the next one. If initial
is provided, it is passed to the first iteration, and becomes the first element of the enumerator; if it is not provided, the first iteration receives nil
, and its result becomes the first element of the iterator.
Raising StopIteration
from the block stops an iteration.
Enumerator.produce(1, &:succ) # => enumerator of 1, 2, 3, 4, .... Enumerator.produce { rand(10) } # => infinite random number sequence ancestors = Enumerator.produce(node) { |prev| node = prev.parent or raise StopIteration } enclosing_section = ancestors.find { |n| n.type == :section }
Using ::produce
together with Enumerable
methods like Enumerable#detect
, Enumerable#slice_after
, Enumerable#take_while
can provide Enumerator-based alternatives for while
and until
cycles:
# Find next Tuesday require "date" Enumerator.produce(Date.today, &:succ).detect(&:tuesday?) # Simple lexer: require "strscan" scanner = StringScanner.new("7+38/6") PATTERN = %r{\d+|[-/+*]} Enumerator.produce { scanner.scan(PATTERN) }.slice_after { scanner.eos? }.first # => ["7", "+", "38", "/", "6"]
Sets the stream’s data mode as binary (see Data Mode).
A stream’s data mode may not be changed from binary to text.
Returns true
if the stream is on binary mode, false
otherwise. See Data Mode.
Sets the data mode in self
to binary mode; see Data Mode.
Puts ARGF
into binary mode. Once a stream is in binary mode, it cannot be reset to non-binary mode. This option has the following effects:
Newline conversion is disabled.
Encoding
conversion is disabled.
Content is treated as ASCII-8BIT.