Copy a OptionalKeywordParameterNode node
Copy a RequiredKeywordParameterNode node
Returns an array of the grapheme clusters in self (see Unicode Grapheme Cluster Boundaries):
s = "\u0061\u0308-pqr-\u0062\u0308-xyz-\u0063\u0308" # => "ä-pqr-b̈-xyz-c̈" s.grapheme_clusters # => ["ä", "-", "p", "q", "r", "-", "b̈", "-", "x", "y", "z", "-", "c̈"]
Returns whether self starts with any of the given string_or_regexp.
Matches patterns against the beginning of self. For each given string_or_regexp, the pattern is:
string_or_regexp itself, if it is a Regexp.
Regexp.quote(string_or_regexp), if string_or_regexp is a string.
Returns true if any pattern matches the beginning, false otherwise:
'hello'.start_with?('hell') # => true 'hello'.start_with?(/H/i) # => true 'hello'.start_with?('heaven', 'hell') # => true 'hello'.start_with?('heaven', 'paradise') # => false 'тест'.start_with?('т') # => true 'こんにちは'.start_with?('こ') # => true
Related: String#end_with?.
Calls the given block with each successive character from self; returns self:
'hello'.each_char {|char| print char, ' ' } print "\n" 'тест'.each_char {|char| print char, ' ' } print "\n" 'こんにちは'.each_char {|char| print char, ' ' } print "\n"
Output:
h e l l o т е с т こ ん に ち は
Returns an enumerator if no block is given.
Like backtrace, but returns each line of the execution stack as a Thread::Backtrace::Location. Accepts the same arguments as backtrace.
f = Fiber.new { Fiber.yield } f.resume loc = f.backtrace_locations.first loc.label #=> "yield" loc.path #=> "test.rb" loc.lineno #=> 1
Returns the Fiber scheduler, that was last set for the current thread with Fiber.set_scheduler if and only if the current fiber is non-blocking.
Returns the locale charmap name. It returns nil if no appropriate information.
Debian GNU/Linux LANG=C Encoding.locale_charmap #=> "ANSI_X3.4-1968" LANG=ja_JP.EUC-JP Encoding.locale_charmap #=> "EUC-JP" SunOS 5 LANG=C Encoding.locale_charmap #=> "646" LANG=ja Encoding.locale_charmap #=> "eucJP"
The result is highly platform dependent. So Encoding.find(Encoding.locale_charmap) may cause an error. If you need some encoding object even for unknown locale, Encoding.find(“locale”) can be used.
Returns an array of instance variable names for the receiver. Note that simply defining an accessor does not create the corresponding instance variable.
class Fred attr_accessor :a1 def initialize @iv = 3 end end Fred.new.instance_variables #=> [:@iv]
Returns any backtrace associated with the exception. This method is similar to Exception#backtrace, but the backtrace is an array of Thread::Backtrace::Location.
This method is not affected by Exception#set_backtrace().
Sets the backtrace information associated with exc. The backtrace must be an array of String objects or a single String in the format described in Exception#backtrace.
Return a list of the local variable names defined where this NameError exception was raised.
Internal use only.
Returns an array of the names of class variables in mod. This includes the names of class variables in any included modules, unless the inherit parameter is set to false.
class One @@var1 = 1 end class Two < One @@var2 = 2 end One.class_variables #=> [:@@var1] Two.class_variables #=> [:@@var2, :@@var1] Two.class_variables(false) #=> [:@@var2]
Return the accept character set for all new CGI instances.
Returns a copy of self with the given start value:
d0 = Date.new(2000, 2, 3) d0.julian? # => false d1 = d0.new_start(Date::JULIAN) d1.julian? # => true
See argument start.
Equivalent to Date#+ with argument n.
Equivalent to Date#- with argument n.
Equivalent to >> with argument n * 12.
Equivalent to << with argument n * 12.
Returns the fractional part of the second in range (Rational(0, 1)…Rational(1, 1)):
DateTime.new(2001, 2, 3, 4, 5, 6.5).sec_fraction # => (1/2)
Returns the fractional part of the second in range (Rational(0, 1)…Rational(1, 1)):
DateTime.new(2001, 2, 3, 4, 5, 6.5).sec_fraction # => (1/2)