Returns the value that determines whether unconverted fields are to be available; used for parsing; see {Option unconverted_fields}:
CSV.new('').unconverted_fields? # => nil
Returns the number of rows.
Called for dup & clone.
Called for dup & clone.
Removes tracing for the specified command on the given global variable and returns nil. If no command is specified, removes all tracing for that variable and returns an array containing the commands actually removed.
Creates an enumerator for each chunked elements. The beginnings of chunks are defined by the block.
This method splits each chunk using adjacent elements, elt_before and elt_after, in the receiver enumerator. This method split chunks between elt_before and elt_after where the block returns false.
The block is called the length of the receiver enumerator minus one.
The result enumerator yields the chunked elements as an array. So each method can be called as follows:
enum.chunk_while { |elt_before, elt_after| bool }.each { |ary| ... }
Other methods of the Enumerator class and Enumerable module, such as to_a, map, etc., are also usable.
For example, one-by-one increasing subsequence can be chunked as follows:
a = [1,2,4,9,10,11,12,15,16,19,20,21] b = a.chunk_while {|i, j| i+1 == j } p b.to_a #=> [[1, 2], [4], [9, 10, 11, 12], [15, 16], [19, 20, 21]] c = b.map {|a| a.length < 3 ? a : "#{a.first}-#{a.last}" } p c #=> [[1, 2], [4], "9-12", [15, 16], "19-21"] d = c.join(",") p d #=> "1,2,4,9-12,15,16,19-21"
Increasing (non-decreasing) subsequence can be chunked as follows:
a = [0, 9, 2, 2, 3, 2, 7, 5, 9, 5] p a.chunk_while {|i, j| i <= j }.to_a #=> [[0, 9], [2, 2, 3], [2, 7], [5, 9], [5]]
Adjacent evens and odds can be chunked as follows: (Enumerable#chunk is another way to do it.)
a = [7, 5, 9, 2, 0, 7, 9, 4, 2, 0] p a.chunk_while {|i, j| i.even? == j.even? }.to_a #=> [[7, 5, 9], [2, 0], [7, 9], [4, 2, 0]]
Enumerable#slice_when does the same, except splitting when the block returns true instead of false.
Enters exclusive section and executes the block. Leaves the exclusive section automatically when the block exits. See example under MonitorMixin.
Initializes the MonitorMixin after being included in a class or when an object has been extended with the MonitorMixin
Counts symbols for each Symbol type.
This method is only for MRI developers interested in performance and memory usage of Ruby programs.
If the optional argument, result_hash, is given, it is overwritten and returned. This is intended to avoid probe effect.
Note: The contents of the returned hash is implementation defined. It may be changed in future.
This method is only expected to work with C Ruby.
On this version of MRI, they have 3 types of Symbols (and 1 total counts).
* mortal_dynamic_symbol: GC target symbols (collected by GC) * immortal_dynamic_symbol: Immortal symbols promoted from dynamic symbols (do not collected by GC) * immortal_static_symbol: Immortal symbols (do not collected by GC) * immortal_symbol: total immortal symbols (immortal_dynamic_symbol+immortal_static_symbol)
Counts nodes for each node type.
This method is only for MRI developers interested in performance and memory usage of Ruby programs.
It returns a hash as:
{:NODE_METHOD=>2027, :NODE_FBODY=>1927, :NODE_CFUNC=>1798, ...}
If the optional argument, result_hash, is given, it is overwritten and returned. This is intended to avoid probe effect.
Note: The contents of the returned hash is implementation defined. It may be changed in future.
This method is only expected to work with C Ruby.
Removes all finalizers for obj.
Counts all objects grouped by type.
It returns a hash, such as:
{
:TOTAL=>10000,
:FREE=>3011,
:T_OBJECT=>6,
:T_CLASS=>404,
# ...
}
The contents of the returned hash are implementation specific. It may be changed in future.
The keys starting with :T_ means live objects. For example, :T_ARRAY is the number of arrays. :FREE means object slots which is not used now. :TOTAL means sum of above.
If the optional argument result_hash is given, it is overwritten and returned. This is intended to avoid probe effect.
h = {} ObjectSpace.count_objects(h) puts h # => { :TOTAL=>10000, :T_CLASS=>158280, :T_MODULE=>20672, :T_STRING=>527249 }
This method is only expected to work on C Ruby.
Load yaml in to a Ruby data structure. If multiple documents are provided, the object contained in the first document will be returned. filename will be used in the exception message if any exception is raised while parsing. If yaml is empty, it returns the specified fallback return value, which defaults to false.
Raises a Psych::SyntaxError when a YAML syntax error is detected.
Example:
Psych.load("--- a") # => 'a' Psych.load("---\n - a\n - b") # => ['a', 'b'] begin Psych.load("--- `", filename: "file.txt") rescue Psych::SyntaxError => ex ex.file # => 'file.txt' ex.message # => "(file.txt): found character that cannot start any token" end
When the optional symbolize_names keyword argument is set to a true value, returns symbols for keys in Hash objects (default: strings).
Psych.load("---\n foo: bar") # => {"foo"=>"bar"} Psych.load("---\n foo: bar", symbolize_names: true) # => {:foo=>"bar"}
Raises a TypeError when ‘yaml` parameter is NilClass
NOTE: This method *should not* be used to parse untrusted documents, such as YAML documents that are supplied via user input. Instead, please use the safe_load method.
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.
Return the number of observers associated with this object.
Unpacks the SecurityBufferDesc structure into member variables. We only want to do this once per struct, so the struct is deleted after unpacking.