Results for: "to_proc"

With a block given returns a hash:

• Each key is a return value from the block.

• Each value is an array of those elements for which the block returned that key.

Examples:

g = (1..6).group_by {|i| i%3 }
g # => {1=>[1, 4], 2=>[2, 5], 0=>[3, 6]}
h = {foo: 0, bar: 1, baz: 0, bat: 1}
g = h.group_by {|key, value| value }
g # => {0=>[[:foo, 0], [:baz, 0]], 1=>[[:bar, 1], [:bat, 1]]}

With no block given, returns an Enumerator.

Calls the block with successive elements as long as the block returns a truthy value; returns an array of all elements after that point:

(1..4).drop_while{|i| i < 3 } # => [3, 4]
h = {foo: 0, bar: 1, baz: 2}
a = h.drop_while{|element| key, value = *element; value < 2 }
a # => [[:baz, 2]]

With no block given, returns an Enumerator.

Returns the last Error of the current executing Thread or nil if none

Sets the last Error of the current executing Thread to error

Arguments obj and opts here are the same as arguments obj and opts in JSON.generate.

Default options are:

{
  indent: '  ',   # Two spaces
  space: ' ',     # One space
  array_nl: "\n", # Newline
  object_nl: "\n" # Newline
}

Example:

obj = {foo: [:bar, :baz], bat: {bam: 0, bad: 1}}
json = JSON.pretty_generate(obj)
puts json

Output:

{
  "foo": [
    "bar",
    "baz"
  ],
  "bat": {
    "bam": 0,
    "bad": 1
  }
}

Returns true if this monitor is locked by any thread

Enters exclusive section and executes the block. Leaves the exclusive section automatically when the block exits. See example under MonitorMixin.

Returns the source file origin from the given object.

See ::trace_object_allocations for more information and examples.

Returns the original line from source for from the given object.

See ::trace_object_allocations for more information and examples.

Returns garbage collector generation for the given object.

class B
  include ObjectSpace

  def foo
    trace_object_allocations do
      obj = Object.new
      p "Generation is #{allocation_generation(obj)}"
    end
  end
end

B.new.foo #=> "Generation is 3"

See ::trace_object_allocations for more information and examples.

Adds a pre-install hook that will be passed an Gem::Installer instance when Gem::Installer#install is called. If the hook returns false then the install will be aborted.

Adds a hook that will get run before Gem::Specification.reset is run.

Adds a pre-uninstall hook that will be passed an Gem::Uninstaller instance and the spec that will be uninstalled when Gem::Uninstaller#uninstall is called

Adds DidYouMean functionality to an error using a given spell checker

Accepts a Thread::Backtrace::Location object and returns a Prism::Node corresponding to the backtrace location in the source code.

Returns whether or not macro is defined either in the common header files or within any headers you provide.

Any options you pass to opt are passed along to the compiler.

SyntaxSuggest.handle_error [Public]

Takes a ‘SyntaxError` exception, uses the error message to locate the file. Then the file will be analyzed to find the location of the syntax error and emit that location to stderr.

Example:

begin
  require 'bad_file'
rescue => e
  SyntaxSuggest.handle_error(e)
end

By default it will re-raise the exception unless ‘re_raise: false`. The message output location can be configured using the `io: $stderr` input.

If a valid filename cannot be determined, the original exception will be re-raised (even with ‘re_raise: false`).

Returns tokens corresponding to the location of the node. Returns nil if keep_tokens is not enabled when parse method is called.

root = RubyVM::AbstractSyntaxTree.parse("x = 1 + 2", keep_tokens: true)
root.tokens # => [[0, :tIDENTIFIER, "x", [1, 0, 1, 1]], [1, :tSP, " ", [1, 1, 1, 2]], ...]
root.tokens.map{_1[2]}.join # => "x = 1 + 2"

Token is an array of:

• id

• token type

• source code text

• location [ first_lineno, first_column, last_lineno, last_column ]

Sends “close notify” to the peer and tries to shut down the SSL connection gracefully.

If a timestamp token is present, this returns it in the form of a OpenSSL::PKCS7.

Restore session state from the session’s FileStore file.

Returns the session state as a hash.

Restore session state.

Returns session data as a hash.

Restore (empty) session state.

Restore session state from the session’s PStore file.

Returns the session state as a hash.