Iterates over strongly connected component in the subgraph reachable from node.
Return value is unspecified.
each_strongly_connected_component_from doesn’t call tsort_each_node.
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_from(2) {|scc| p scc } #=> [4] # [2] graph = G.new({1=>[2], 2=>[3, 4], 3=>[2], 4=>[]}) graph.each_strongly_connected_component_from(2) {|scc| p scc } #=> [4] # [2, 3]
Iterates over strongly connected components in a graph. The graph is represented by node and each_child.
node is the first node. each_child should have call method which takes a node argument and yields for each child node.
Return value is unspecified.
TSort.each_strongly_connected_component_from is a class method and it doesn’t need a class to represent a graph which includes TSort.
graph = {1=>[2], 2=>[3, 4], 3=>[2], 4=>[]} each_child = lambda {|n, &b| graph[n].each(&b) } TSort.each_strongly_connected_component_from(1, each_child) {|scc| p scc } #=> [4] # [2, 3] # [1]
Returns true if the given year is a leap year in the proleptic Julian calendar, false otherwise:
Date.julian_leap?(1900) # => true Date.julian_leap?(1901) # => false
Related: Date.gregorian_leap?.
Returns the array of WIN32OLE_METHOD object. The element is OLE method of WIN32OLE object.
excel = WIN32OLE.new('Excel.Application') methods = excel.ole_methods
Returns WIN32OLE_METHOD object corresponding with method specified by 1st argument.
excel = WIN32OLE.new('Excel.Application') method = excel.ole_method_help('Quit')
Returns the file extension appended to the names of backup copies of modified files under in-place edit mode. This value can be set using ARGF.inplace_mode= or passing the -i switch to the Ruby binary.
Sets the filename extension for in-place editing mode to the given String. The backup copy of each file being edited has this value appended to its filename.
For example:
$ ruby argf.rb file.txt
ARGF.inplace_mode = '.bak'
ARGF.each_line do |line|
print line.sub("foo","bar")
end
First, file.txt.bak is created as a backup copy of file.txt. Then, each line of file.txt has the first occurrence of “foo” replaced with “bar”.
Turns FIPS mode on or off. Turning on FIPS mode will obviously only have an effect for FIPS-capable installations of the OpenSSL library. Trying to do so otherwise will result in an error.
OpenSSL.fips_mode = true # turn FIPS mode on OpenSSL.fips_mode = false # and off again
Removes the file entry given by path, which should be the entry for a regular file or a symbolic link.
Argument path should be interpretable as a path.
Optional argument force specifies whether to ignore raised exceptions of StandardError and its descendants.
Related: methods for deleting.
Removes the file entry given by path, which should be the entry for a regular file or a symbolic link.
Argument path should be interpretable as a path.
Optional argument force specifies whether to ignore raised exceptions of StandardError and its descendants.
Related: methods for deleting.
Takes a hash as its argument. The key is a symbol or an array of symbols. These symbols correspond to method names. The value is the accessor to which the methods will be delegated.
Creates a stub Makefile.
Processes the data contents of the “depend” file. Each line of this file is expected to be a file name.
Returns the output of findings, in Makefile format.
The mode needed to read a file as straight binary.
Returns the BubbleBabble encoded hash value of a given string.
Returns an integer representing the permission bits of stat. The meaning of the bits is platform dependent; on Unix systems, see stat(2).
File.chmod(0644, "testfile") #=> 1 s = File.stat("testfile") sprintf("%o", s.mode) #=> "100644"
Returns the resulting hash value in a Bubblebabble encoded form.