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.
Deprecated method. Don’t use.
Returns true if the named file is readable by the effective user and group id of this process. See eaccess(3).
Returns true if the named file has the sticky bit set.
Initiates garbage collection, unless manually disabled.
This method is defined with keyword arguments that default to true:
def GC.start(full_mark: true, immediate_sweep: true); end
Use full_mark: false to perform a minor GC. Use immediate_sweep: false to defer sweeping (use lazy sweep).
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 hash includes information about internal statistics about GC such as:
{
:count=>0,
:heap_allocated_pages=>24,
:heap_sorted_length=>24,
:heap_allocatable_pages=>0,
:heap_available_slots=>9783,
:heap_live_slots=>7713,
:heap_free_slots=>2070,
:heap_final_slots=>0,
:heap_marked_slots=>0,
:heap_eden_pages=>24,
:heap_tomb_pages=>0,
:total_allocated_pages=>24,
:total_freed_pages=>0,
:total_allocated_objects=>7796,
:total_freed_objects=>83,
:malloc_increase_bytes=>2389312,
:malloc_increase_bytes_limit=>16777216,
:minor_gc_count=>0,
:major_gc_count=>0,
:remembered_wb_unprotected_objects=>0,
:remembered_wb_unprotected_objects_limit=>0,
:old_objects=>0,
:old_objects_limit=>0,
:oldmalloc_increase_bytes=>2389760,
:oldmalloc_increase_bytes_limit=>16777216
}
The contents of the hash are implementation specific and may be changed in the future.
This method is only expected to work on C Ruby.
Given a set of strings, calculate the set of unambiguous abbreviations for those strings, and return a hash where the keys are all the possible abbreviations and the values are the full strings.
Thus, given words is “car” and “cone”, the keys pointing to “car” would be “ca” and “car”, while those pointing to “cone” would be “co”, “con”, and “cone”.
require 'abbrev' Abbrev.abbrev(%w{ car cone }) #=> {"ca"=>"car", "con"=>"cone", "co"=>"cone", "car"=>"car", "cone"=>"cone"}
The optional pattern parameter is a pattern or a string. Only input strings that match the pattern or start with the string are included in the output hash.
Abbrev.abbrev(%w{car box cone crab}, /b/) #=> {"box"=>"box", "bo"=>"box", "b"=>"box", "crab" => "crab"} Abbrev.abbrev(%w{car box cone}, 'ca') #=> {"car"=>"car", "ca"=>"car"}
Given a set of strings, calculate the set of unambiguous abbreviations for those strings, and return a hash where the keys are all the possible abbreviations and the values are the full strings.
Thus, given words is “car” and “cone”, the keys pointing to “car” would be “ca” and “car”, while those pointing to “cone” would be “co”, “con”, and “cone”.
require 'abbrev' Abbrev.abbrev(%w{ car cone }) #=> {"ca"=>"car", "con"=>"cone", "co"=>"cone", "car"=>"car", "cone"=>"cone"}
The optional pattern parameter is a pattern or a string. Only input strings that match the pattern or start with the string are included in the output hash.
Abbrev.abbrev(%w{car box cone crab}, /b/) #=> {"box"=>"box", "bo"=>"box", "b"=>"box", "crab" => "crab"} Abbrev.abbrev(%w{car box cone}, 'ca') #=> {"car"=>"car", "ca"=>"car"}
Returns the time used to execute the given block as a Benchmark::Tms object. Takes label option.
require 'benchmark' n = 1000000 time = Benchmark.measure do n.times { a = "1" } end puts time
Generates:
0.220000 0.000000 0.220000 ( 0.227313)
Returns the elapsed real time used to execute the given block.
Returns the time used to execute the given block as a Benchmark::Tms object. Takes label option.
require 'benchmark' n = 1000000 time = Benchmark.measure do n.times { a = "1" } end puts time
Generates:
0.220000 0.000000 0.220000 ( 0.227313)
Returns the elapsed real time used to execute the given block.
Is uri the URI for the current local server?
Get the thread of the primary server.
This returns nil if there is no primary server. See primary_server.
Get the thread of the primary server.
This returns nil if there is no primary server. See primary_server.
Returns true if new is newer than all old_list. Non-existent files are older than any file.
FileUtils.uptodate?('hello.o', %w(hello.c hello.h)) or \ system 'make hello.o'
Returns true if new is newer than all old_list. Non-existent files are older than any file.
FileUtils.uptodate?('hello.o', %w(hello.c hello.h)) or \ system 'make hello.o'
If src is not same as dest, copies it and changes the permission mode to mode. If dest is a directory, destination is dest/src. This method removes destination before copy.
FileUtils.install 'ruby', '/usr/local/bin/ruby', :mode => 0755, :verbose => true FileUtils.install 'lib.rb', '/usr/local/lib/ruby/site_ruby', :verbose => true
If src is not same as dest, copies it and changes the permission mode to mode. If dest is a directory, destination is dest/src. This method removes destination before copy.
FileUtils.install 'ruby', '/usr/local/bin/ruby', :mode => 0755, :verbose => true FileUtils.install 'lib.rb', '/usr/local/lib/ruby/site_ruby', :verbose => true
Updates modification time (mtime) and access time (atime) of file(s) in list. Files are created if they don’t exist.
FileUtils.touch 'timestamp' FileUtils.touch Dir.glob('*.c'); system 'make'