Returns true if the set is a proper superset of the given set.
Returns the String created by generating CSV from ary using the specified options.
Argument ary must be an Array.
Special options:
Option :row_sep defaults to "\n"> on Ruby 3.0 or later and <tt>$INPUT_RECORD_SEPARATOR ($/) otherwise.:
$INPUT_RECORD_SEPARATOR # => "\n"
This method accepts an additional option, :encoding, which sets the base Encoding for the output. This method will try to guess your Encoding from the first non-nil field in row, if possible, but you may need to use this parameter as a backup plan.
For other options, see Options for Generating.
Returns the String generated from an Array:
CSV.generate_line(['foo', '0']) # => "foo,0\n"
Raises an exception if ary is not an Array:
# Raises NoMethodError (undefined method `find' for :foo:Symbol) CSV.generate_line(:foo)
Returns the String created by generating CSV from using the specified options.
Argument rows must be an Array of row. Row is Array of String or CSV::Row.
Special options:
Option :row_sep defaults to "\n" on Ruby 3.0 or later and $INPUT_RECORD_SEPARATOR ($/) otherwise.:
$INPUT_RECORD_SEPARATOR # => "\n"
This method accepts an additional option, :encoding, which sets the base Encoding for the output. This method will try to guess your Encoding from the first non-nil field in row, if possible, but you may need to use this parameter as a backup plan.
For other options, see Options for Generating.
Returns the String generated from an
CSV.generate_lines([['foo', '0'], ['bar', '1'], ['baz', '2']]) # => "foo,0\nbar,1\nbaz,2\n"
Raises an exception
# Raises NoMethodError (undefined method `each' for :foo:Symbol) CSV.generate_lines(:foo)
The block need not return a String object:
csv = CSV.open(path, headers: true) csv.header_convert {|header, field_info| header.to_sym } table = csv.read table.headers # => [:Name, :Value]
If converter_name is given, the block is not called:
csv = CSV.open(path, headers: true) csv.header_convert(:downcase) {|header, field_info| fail 'Cannot happen' } table = csv.read table.headers # => ["name", "value"]
Raises a parse-time exception if converter_name is not the name of a built-in field converter:
csv = CSV.open(path, headers: true) csv.header_convert(:nosuch) # Raises NoMethodError (undefined method `arity' for nil:NilClass) csv.read
Return the appropriate error message in POSIX-defined format. If no error has occurred, returns nil.
Returns the current execution stack—an array containing backtrace location objects.
See Thread::Backtrace::Location for more information.
The optional start parameter determines the number of initial stack entries to omit from the top of the stack.
A second optional length parameter can be used to limit how many entries are returned from the stack.
Returns nil if start is greater than the size of current execution stack.
Optionally you can pass a range, which will return an array containing the entries within the specified range.
Arguments obj and opts here are the same as arguments obj and opts in JSON.generate.
By default, generates JSON data without checking for circular references in obj (option max_nesting set to false, disabled).
Raises an exception if obj contains circular references:
a = []; b = []; a.push(b); b.push(a) # Raises SystemStackError (stack level too deep): JSON.fast_generate(a)
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 the number of malloc() allocations.
Only available if ruby was built with CALC_EXACT_MALLOC_SIZE.
A Gem::Version for the currently running RubyGems
Get the ‘current’ server.
In the context of execution taking place within the main thread of a dRuby server (typically, as a result of a remote call on the server or one of its objects), the current server is that server. Otherwise, the current server is the primary server.
If the above rule fails to find a server, a DRbServerNotFound error is raised.
Get the ‘current’ server.
In the context of execution taking place within the main thread of a dRuby server (typically, as a result of a remote call on the server or one of its objects), the current server is that server. Otherwise, the current server is the primary server.
If the above rule fails to find a server, a DRbServerNotFound error is raised.
Registers server with DRb.
This is called when a new DRb::DRbServer is created.
If there is no primary server then server becomes the primary server.
Example:
require 'drb' s = DRb::DRbServer.new # automatically calls regist_server DRb.fetch_server s.uri #=> #<DRb::DRbServer:0x...>
Registers server with DRb.
This is called when a new DRb::DRbServer is created.
If there is no primary server then server becomes the primary server.
Example:
require 'drb' s = DRb::DRbServer.new # automatically calls regist_server DRb.fetch_server s.uri #=> #<DRb::DRbServer:0x...>
Removes server from the list of registered servers.
Removes server from the list of registered servers.
Retrieves the server with the given uri.
See also regist_server and remove_server.
Add observer as an observer on this object. So that it will receive notifications.
observer
the object that will be notified of changes.
func
Symbol naming the method that will be called when this Observable has changes.
This method must return true for observer.respond_to? and will receive *arg when notify_observers is called, where *arg is the value passed to notify_observers by this Observable
Remove observer as an observer on this object so that it will no longer receive notifications.
observer
An observer of this Observable