Returns true if ARGF
is being read in binary mode; false otherwise. To enable binary mode use ARGF.binmode
.
For example:
ARGF.binmode? #=> false ARGF.binmode ARGF.binmode? #=> true
Returns a BubbleBabble encoded version of a given string.
Changes permissions on the entries at the paths given in list
(a single path or an array of paths) to the permissions given by mode
; returns list
if it is an array, [list]
otherwise:
Modifies each entry that is a regular file using File.chmod
.
Modifies each entry that is a symbolic link using File.lchmod
.
Argument list
or its elements should be interpretable as paths.
Argument mode
may be either an integer or a string:
Integer mode
: represents the permission bits to be set:
FileUtils.chmod(0755, 'src0.txt') FileUtils.chmod(0644, ['src0.txt', 'src0.dat'])
String mode
: represents the permissions to be set:
The string is of the form [targets][[operator][perms[,perms]]
, where:
targets
may be any combination of these letters:
'u'
: permissions apply to the file’s owner.
'g'
: permissions apply to users in the file’s group.
'o'
: permissions apply to other users not in the file’s group.
'a'
(the default): permissions apply to all users.
operator
may be one of these letters:
'+'
: adds permissions.
'-'
: removes permissions.
'='
: sets (replaces) permissions.
perms
(may be repeated, with separating commas) may be any combination of these letters:
'r'
: Read.
'w'
: Write.
'x'
: Execute (search, for a directory).
'X'
: Search (for a directories only; must be used with '+'
)
's'
: Uid or gid.
't'
: Sticky bit.
Examples:
FileUtils.chmod('u=wrx,go=rx', 'src1.txt') FileUtils.chmod('u=wrx,go=rx', '/usr/bin/ruby')
Keyword arguments:
noop: true
- does not change permissions; returns nil
.
verbose: true
- prints an equivalent command:
FileUtils.chmod(0755, 'src0.txt', noop: true, verbose: true) FileUtils.chmod(0644, ['src0.txt', 'src0.dat'], noop: true, verbose: true) FileUtils.chmod('u=wrx,go=rx', 'src1.txt', noop: true, verbose: true) FileUtils.chmod('u=wrx,go=rx', '/usr/bin/ruby', noop: true, verbose: true)
Output:
chmod 755 src0.txt chmod 644 src0.txt src0.dat chmod u=wrx,go=rx src1.txt chmod u=wrx,go=rx /usr/bin/ruby
Related: FileUtils.chmod_R
.
Changes permissions on the entries at the paths given in list
(a single path or an array of paths) to the permissions given by mode
; returns list
if it is an array, [list]
otherwise:
Modifies each entry that is a regular file using File.chmod
.
Modifies each entry that is a symbolic link using File.lchmod
.
Argument list
or its elements should be interpretable as paths.
Argument mode
may be either an integer or a string:
Integer mode
: represents the permission bits to be set:
FileUtils.chmod(0755, 'src0.txt') FileUtils.chmod(0644, ['src0.txt', 'src0.dat'])
String mode
: represents the permissions to be set:
The string is of the form [targets][[operator][perms[,perms]]
, where:
targets
may be any combination of these letters:
'u'
: permissions apply to the file’s owner.
'g'
: permissions apply to users in the file’s group.
'o'
: permissions apply to other users not in the file’s group.
'a'
(the default): permissions apply to all users.
operator
may be one of these letters:
'+'
: adds permissions.
'-'
: removes permissions.
'='
: sets (replaces) permissions.
perms
(may be repeated, with separating commas) may be any combination of these letters:
'r'
: Read.
'w'
: Write.
'x'
: Execute (search, for a directory).
'X'
: Search (for a directories only; must be used with '+'
)
's'
: Uid or gid.
't'
: Sticky bit.
Examples:
FileUtils.chmod('u=wrx,go=rx', 'src1.txt') FileUtils.chmod('u=wrx,go=rx', '/usr/bin/ruby')
Keyword arguments:
noop: true
- does not change permissions; returns nil
.
verbose: true
- prints an equivalent command:
FileUtils.chmod(0755, 'src0.txt', noop: true, verbose: true) FileUtils.chmod(0644, ['src0.txt', 'src0.dat'], noop: true, verbose: true) FileUtils.chmod('u=wrx,go=rx', 'src1.txt', noop: true, verbose: true) FileUtils.chmod('u=wrx,go=rx', '/usr/bin/ruby', noop: true, verbose: true)
Output:
chmod 755 src0.txt chmod 644 src0.txt src0.dat chmod u=wrx,go=rx src1.txt chmod u=wrx,go=rx /usr/bin/ruby
Related: FileUtils.chmod_R
.
Like FileUtils.chmod
, but changes permissions recursively.
Like FileUtils.chmod
, but changes permissions recursively.
Returns time stamp of the target
file if it exists and is newer than or equal to all of times
.
True if the gems in the system satisfy dependency
.
Returns whether the HTTP
session is to be kept alive.
Add the –version option to the option parser.
Starts tracing object allocations.
Stop tracing object allocations.
Note that if ::trace_object_allocations_start
is called n-times, then tracing will stop after calling ::trace_object_allocations_stop
n-times.
The iterator version of the strongly_connected_components
method. obj.each_strongly_connected_component
is similar to obj.strongly_connected_components.each
, but modification of obj during the iteration may lead to unexpected results.
each_strongly_connected_component
returns nil
.
class G include TSort def initialize(g) @g = g end def tsort_each_child(n, &b) @g[n].each(&b) end def tsort_each_node(&b) @g.each_key(&b) end end graph = G.new({1=>[2, 3], 2=>[4], 3=>[2, 4], 4=>[]}) graph.each_strongly_connected_component {|scc| p scc } #=> [4] # [2] # [3] # [1] graph = G.new({1=>[2], 2=>[3, 4], 3=>[2], 4=>[]}) graph.each_strongly_connected_component {|scc| p scc } #=> [4] # [2, 3] # [1]
The iterator version of the TSort.strongly_connected_components
method.
The graph is represented by each_node and each_child. each_node should have call
method which yields for each node in the graph. each_child should have call
method which takes a node argument and yields for each child node.
g = {1=>[2, 3], 2=>[4], 3=>[2, 4], 4=>[]} each_node = lambda {|&b| g.each_key(&b) } each_child = lambda {|n, &b| g[n].each(&b) } TSort.each_strongly_connected_component(each_node, each_child) {|scc| p scc } #=> [4] # [2] # [3] # [1] g = {1=>[2], 2=>[3, 4], 3=>[2], 4=>[]} each_node = lambda {|&b| g.each_key(&b) } each_child = lambda {|n, &b| g[n].each(&b) } TSort.each_strongly_connected_component(each_node, each_child) {|scc| p scc } #=> [4] # [2, 3] # [1]
Sets the preset dictionary and returns string
. This method is available just only after Zlib::Deflate.new
or Zlib::ZStream#reset
method was called. See zlib.h for details.
Can raise errors of Z_STREAM_ERROR if a parameter is invalid (such as NULL dictionary) or the stream state is inconsistent, Z_DATA_ERROR if the given dictionary doesn’t match the expected one (incorrect adler32 value)
Provide the inflate stream with a dictionary that may be required in the future. Multiple dictionaries may be provided. The inflate stream will automatically choose the correct user-provided dictionary based on the stream’s required dictionary.
Sets the preset dictionary and returns string
. This method is available just only after a Zlib::NeedDict
exception was raised. See zlib.h for details.
Terminate the application with exit code status
, running any exit handlers that might have been defined.
Terminates the RubyGems process with the given exit_code
Get the indentation level.