Returns the pre-match
(in the regular expression sense) of the last scan.s = StringScanner.new('test string') s.scan(/\w+/) # -> "test" s.scan(/\s+/) # -> " " s.pre_match # -> "test" s.post_match # -> "string"
Returns the post-match
(in the regular expression sense) of the last scan.s = StringScanner.new('test string') s.scan(/\w+/) # -> "test" s.scan(/\s+/) # -> " " s.pre_match # -> "test" s.post_match # -> "string"
Whether scanner
uses fixed anchor mode or not.
If fixed anchor mode is used, \A
always matches the beginning of the string. Otherwise, \A
always matches the current position.
Returns a hash of string variables matching the regular expression.
scan = StringScanner.new('foobarbaz') scan.match?(/(?<f>foo)(?<r>bar)(?<z>baz)/) scan.named_captures # -> {"f"=>"foo", "r"=>"bar", "z"=>"baz"}
Defines the constants of OLE Automation server as mod’s constants. The first argument is WIN32OLE
object or type library name. If 2nd argument is omitted, the default is WIN32OLE
. The first letter of Ruby’s constant variable name is upper case, so constant variable name of WIN32OLE
object is capitalized. For example, the ‘xlTop’ constant of Excel is changed to ‘XlTop’ in WIN32OLE
. If the first letter of constant variable is not [A-Z], then the constant is defined as CONSTANTS hash element.
module EXCEL_CONST end excel = WIN32OLE.new('Excel.Application') WIN32OLE.const_load(excel, EXCEL_CONST) puts EXCEL_CONST::XlTop # => -4160 puts EXCEL_CONST::CONSTANTS['_xlDialogChartSourceData'] # => 541 WIN32OLE.const_load(excel) puts WIN32OLE::XlTop # => -4160 module MSO end WIN32OLE.const_load('Microsoft Office 9.0 Object Library', MSO) puts MSO::MsoLineSingle # => 1
Invokes Release method of Dispatch interface of WIN32OLE
object. You should not use this method because this method exists only for debugging WIN32OLE
. The return value is reference counter of OLE object.
Creates GUID.
WIN32OLE.create_guid # => {1CB530F1-F6B1-404D-BCE6-1959BF91F4A8}
invokes Release method of Dispatch interface of WIN32OLE
object. Usually, you do not need to call this method because Release method called automatically when WIN32OLE
object garbaged.
Evaluates a string containing Ruby source code, or the given block, within the context of the receiver (obj). In order to set the context, the variable self
is set to obj while the code is executing, giving the code access to obj’s instance variables and private methods.
When instance_eval
is given a block, obj is also passed in as the block’s only argument.
When instance_eval
is given a String
, the optional second and third parameters supply a filename and starting line number that are used when reporting compilation errors.
class KlassWithSecret def initialize @secret = 99 end private def the_secret "Ssssh! The secret is #{@secret}." end end k = KlassWithSecret.new k.instance_eval { @secret } #=> 99 k.instance_eval { the_secret } #=> "Ssssh! The secret is 99." k.instance_eval {|obj| obj == self } #=> true
Executes the given block within the context of the receiver (obj). In order to set the context, the variable self
is set to obj while the code is executing, giving the code access to obj’s instance variables. Arguments are passed as block parameters.
class KlassWithSecret def initialize @secret = 99 end end k = KlassWithSecret.new k.instance_exec(5) {|x| @secret+x } #=> 104
Returns self
.
Returns a Proc
object that maps a key to its value:
h = {foo: 0, bar: 1, baz: 2} proc = h.to_proc proc.class # => Proc proc.call(:foo) # => 0 proc.call(:bar) # => 1 proc.call(:nosuch) # => nil
Returns a new Hash object; each entry has:
A key provided by the block.
The value from self
.
An optional hash argument can be provided to map keys to new keys. Any key not given will be mapped using the provided block, or remain the same if no block is given.
Transform keys:
h = {foo: 0, bar: 1, baz: 2} h1 = h.transform_keys {|key| key.to_s } h1 # => {"foo"=>0, "bar"=>1, "baz"=>2} h.transform_keys(foo: :bar, bar: :foo) #=> {bar: 0, foo: 1, baz: 2} h.transform_keys(foo: :hello, &:to_s) #=> {:hello=>0, "bar"=>1, "baz"=>2}
Overwrites values for duplicate keys:
h = {foo: 0, bar: 1, baz: 2} h1 = h.transform_keys {|key| :bat } h1 # => {:bat=>2}
Returns a new Enumerator
if no block given:
h = {foo: 0, bar: 1, baz: 2} e = h.transform_keys # => #<Enumerator: {:foo=>0, :bar=>1, :baz=>2}:transform_keys> h1 = e.each { |key| key.to_s } h1 # => {"foo"=>0, "bar"=>1, "baz"=>2}
Same as Hash#transform_keys
but modifies the receiver in place instead of returning a new hash.
Returns a new Hash object; each entry has:
A key from self
.
A value provided by the block.
Transform values:
h = {foo: 0, bar: 1, baz: 2} h1 = h.transform_values {|value| value * 100} h1 # => {:foo=>0, :bar=>100, :baz=>200}
Returns a new Enumerator
if no block given:
h = {foo: 0, bar: 1, baz: 2} e = h.transform_values # => #<Enumerator: {:foo=>0, :bar=>1, :baz=>2}:transform_values> h1 = e.each { |value| value * 100} h1 # => {:foo=>0, :bar=>100, :baz=>200}
Returns self
, whose keys are unchanged, and whose values are determined by the given block.
h = {foo: 0, bar: 1, baz: 2} h.transform_values! {|value| value * 100} # => {:foo=>0, :bar=>100, :baz=>200}
Returns a new Enumerator
if no block given:
h = {foo: 0, bar: 1, baz: 2} e = h.transform_values! # => #<Enumerator: {:foo=>0, :bar=>100, :baz=>200}:transform_values!> h1 = e.each {|value| value * 100} h1 # => {:foo=>0, :bar=>100, :baz=>200}
Returns a Hash
containing all name/value pairs from ENV:
ENV.replace('foo' => '0', 'bar' => '1') ENV.to_hash # => {"bar"=>"1", "foo"=>"0"}
Returns an IO
object representing the current file. This will be a File
object unless the current file is a stream such as STDIN.
For example:
ARGF.to_io #=> #<File:glark.txt> ARGF.to_io #=> #<IO:<STDIN>>
Reads at most maxlen bytes from the ARGF
stream in non-blocking mode.
Returns the value that determines whether headers are to be returned; used for parsing; see {Option return_headers
}:
CSV.new('').return_headers? # => false
Returns the value that determines whether all output fields are to be quoted; used for generating; see {Option force_quotes
}:
CSV.new('').force_quotes? # => false
Returns a new binding each time near TOPLEVEL_BINDING for runs that do not specify a binding.
Set an error (a protected method).