Returns a 3-element array of substrings of self
.
Matches a pattern against self
, scanning backwards from the end. The pattern is:
string_or_regexp
itself, if it is a Regexp
.
Regexp.quote(string_or_regexp)
, if string_or_regexp
is a string.
If the pattern is matched, returns pre-match, last-match, post-match:
'hello'.rpartition('l') # => ["hel", "l", "o"] 'hello'.rpartition('ll') # => ["he", "ll", "o"] 'hello'.rpartition('h') # => ["", "h", "ello"] 'hello'.rpartition('o') # => ["hell", "o", ""] 'hello'.rpartition(/l+/) # => ["hel", "l", "o"] 'hello'.rpartition('') # => ["hello", "", ""] 'тест'.rpartition('т') # => ["тес", "т", ""] 'こんにちは'.rpartition('に') # => ["こん", "に", "ちは"]
If the pattern is not matched, returns two empty strings and a copy of self
:
'hello'.rpartition('x') # => ["", "", "hello"]
Related: String#partition
, String#split
.
Opens a transaction block for the store. See Transactions.
With argument read_only
as false
, the block may both read from and write to the store.
With argument read_only
as true
, the block may not include calls to transaction
, []=
, or delete
.
Raises an exception if called within a transaction block.
With a block given, returns an array of two arrays:
The first having those elements for which the block returns a truthy value.
The other having all other elements.
Examples:
p = (1..4).partition {|i| i.even? } p # => [[2, 4], [1, 3]] p = ('a'..'d').partition {|c| c < 'c' } p # => [["a", "b"], ["c", "d"]] h = {foo: 0, bar: 1, baz: 2, bat: 3} p = h.partition {|key, value| key.start_with?('b') } p # => [[[:bar, 1], [:baz, 2], [:bat, 3]], [[:foo, 0]]] p = h.partition {|key, value| value < 2 } p # => [[[:foo, 0], [:bar, 1]], [[:baz, 2], [:bat, 3]]]
With no block given, returns an Enumerator
.
Related: Enumerable#group_by
.
The standard configuration object for gems.
Use the given configuration object (which implements the ConfigFile
protocol) as the standard configuration object.
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 compiled instruction sequence represented by a RubyVM::InstructionSequence
instance on the :script_compiled
event.
Note that this method is CRuby-specific.
Foo::Bar ^^^^^^^^
Foo = 1 ^^^^^^^
Foo, Bar = 1 ^^^ ^^^
Foo::Bar ^^^^^^^^
If the bounds of a range node are empty parentheses, then they do not get replaced by their usual s(:nil), but instead are s(:begin).
Foo += bar ^^^^^^^^^^^
Foo &&= bar ^^^^^^^^^^^^
Foo ||= bar ^^^^^^^^^^^^
Foo::Bar = 1 ^^^^^^^^^^^^
Foo::Foo, Bar::Bar = 1 ^^^^^^^^ ^^^^^^^^
Foo::Bar, = baz ^^^^^^^^