Returns whether for any element object == element:
(1..4).include?(2) # => true (1..4).include?(5) # => false (1..4).include?('2') # => false %w[a b c d].include?('b') # => true %w[a b c d].include?('2') # => false {foo: 0, bar: 1, baz: 2}.include?(:foo) # => true {foo: 0, bar: 1, baz: 2}.include?('foo') # => false {foo: 0, bar: 1, baz: 2}.include?(0) # => false
Returns an enumerator object generated from this enumerator and given enumerables.
e = (1..3).chain([4, 5]) e.to_a #=> [1, 2, 3, 4, 5]
Computes the sine of decimal to the specified number of digits of precision, numeric.
If decimal is Infinity or NaN, returns NaN.
BigMath.sin(BigMath.PI(5)/4, 5).to_s #=> "0.70710678118654752440082036563292800375e0"
Enables the coverage measurement. See the documentation of Coverage class in detail. This is equivalent to Coverage.setup and Coverage.resume.
Returns the state of the coverage measurement.
Returns the short user name of the currently logged in user. Unfortunately, it is often rather easy to fool ::getlogin.
Avoid ::getlogin for security-related purposes.
If ::getlogin fails, try ::getpwuid.
See the unix manpage for getpwuid(3) for more detail.
e.g.
Etc.getlogin -> 'guest'
Returns system temporary directory; typically “/tmp”.
Returns a Digest subclass by name
require 'openssl' OpenSSL::Digest("MD5") # => OpenSSL::Digest::MD5 Digest("Foo") # => NameError: wrong constant name Foo
Returns a Digest subclass by name
require 'openssl' OpenSSL::Digest("MD5") # => OpenSSL::Digest::MD5 Digest("Foo") # => NameError: wrong constant name Foo
Returns an inspect() string summarizing the object state.
Decompresses string. Raises a Zlib::NeedDict exception if a preset dictionary is needed for decompression.
This method is almost equivalent to the following code:
def inflate(string) zstream = Zlib::Inflate.new buf = zstream.inflate(string) zstream.finish zstream.close buf end
See also Zlib.deflate
Return true if the named file exists.
file_name can be an IO object.
“file exists” means that stat() or fstat() system call is successful.
Returns true if the named file is writable by the effective user and group id of this process. See eaccess(3).
Note that some OS-level security features may cause this to return true even though the file is not writable by the effective user/group.
Returns true if filepath points to a symbolic link, false otherwise:
symlink = File.symlink('t.txt', 'symlink') File.symlink?('symlink') # => true File.symlink?('t.txt') # => false
Returns true if the named file has the sticky bit set.
file_name can be an IO object.
Initiates garbage collection, even if manually disabled.
The full_mark keyword argument determines whether or not to perform a major garbage collection cycle. When set to true, a major garbage collection cycle is ran, meaning all objects are marked. When set to false, a minor garbage collection cycle is ran, meaning only young objects are marked.
The immediate_mark keyword argument determines whether or not to perform incremental marking. When set to true, marking is completed during the call to this method. When set to false, marking is performed in steps that is interleaved with future Ruby code execution, so marking might not be completed during this method call. Note that if full_mark is false then marking will always be immediate, regardless of the value of immediate_mark.
The immedate_sweep keyword argument determines whether or not to defer sweeping (using lazy sweep). When set to true, sweeping is performed in steps that is interleaved with future Ruby code execution, so sweeping might not be completed during this method call. When set to false, sweeping is completed during the call to this method.
Note: These keyword arguments are implementation and version dependent. They are not guaranteed to be future-compatible, and may be ignored if the underlying implementation does not support them.
Returns a Hash containing information about the GC.
The contents of the hash are implementation specific and may change in the future without notice.
The hash includes information about internal statistics about GC such as:
The total number of garbage collections ran since application start (count includes both minor and major garbage collections)
The total time spent in garbage collections (in milliseconds)
The total number of :heap_eden_pages + :heap_tomb_pages
The number of pages that can fit into the buffer that holds references to all pages
The total number of pages the application could allocate without additional GC
The total number of slots in all :heap_allocated_pages
The total number of slots which contain live objects
The total number of slots which do not contain live objects
The total number of slots with pending finalizers to be run
The total number of objects marked in the last GC
The total number of pages which contain at least one live slot
The total number of pages which do not contain any live slots
The cumulative number of pages allocated since application start
The cumulative number of pages freed since application start
The cumulative number of objects allocated since application start
The cumulative number of objects freed since application start
Amount of memory allocated on the heap for objects. Decreased by any GC
When :malloc_increase_bytes crosses this limit, GC is triggered
The total number of minor garbage collections run since process start
The total number of major garbage collections run since process start
The total number of compactions run since process start
The total number of times the read barrier was triggered during compaction
The total number of objects compaction has moved
The total number of objects without write barriers
When :remembered_wb_unprotected_objects crosses this limit, major GC is triggered
Number of live, old objects which have survived at least 3 garbage collections
When :old_objects crosses this limit, major GC is triggered
Amount of memory allocated on the heap for objects. Decreased by major GC
When :old_malloc_increase_bytes crosses this limit, major GC is triggered
If the optional argument, hash, is given, it is overwritten and returned. This is intended to avoid probe effect.
This method is only expected to work on CRuby.
The path where gem executables are to be installed.
The path were rubygems plugins are to be installed.
Get the default RubyGems API host. This is normally https://rubygems.org.
Set the default RubyGems API host.
Get the URI defining the local dRuby space.
This is the URI of the current server. See current_server.
Get the URI defining the local dRuby space.
This is the URI of the current server. See current_server.