Returns the encoded row separator; used for parsing and writing; see {Option row_sep}:
CSV.new('').row_sep # => "\n"
Returns the encoded quote character; used for parsing and writing; see {Option quote_char}:
CSV.new('').quote_char # => "\""
Returns true if the next row to be read is a header row; false otherwise.
Without headers:
string = "foo,0\nbar,1\nbaz,2\n" csv = CSV.new(string) csv.header_row? # => false
With headers:
string = "Name,Value\nfoo,0\nbar,1\nbaz,2\n" csv = CSV.new(string, headers: true) csv.header_row? # => true csv.shift # => #<CSV::Row "Name":"foo" "Value":"0"> csv.header_row? # => false
Raises an exception if the source is not opened for reading:
string = "foo,0\nbar,1\nbaz,2\n" csv = CSV.new(string) csv.close # Raises IOError (not opened for reading) csv.header_row?
Creates a new compiler for ERB. See ERB::Compiler.new for details
Returns a new binding each time near TOPLEVEL_BINDING for runs that do not specify a binding.
Return the appropriate error message in POSIX-defined format. If no error has occurred, returns nil.
Returns true if the ipaddr is an IPv4-compatible IPv6 address.
Returns a new ipaddr built by converting the native IPv4 address into an IPv4-compatible IPv6 address.
Returns the IPv6 zone identifier, if present. Raises InvalidAddressError if not an IPv6 address.
Returns the IPv6 zone identifier, if present. Raises InvalidAddressError if not an IPv6 address.
Returns the names of the binding’s local variables as symbols.
def foo a = 1 2.times do |n| binding.local_variables #=> [:a, :n] end end
This method is the short version of the following code:
binding.eval("local_variables")
Sets the date-time format.
Argument datetime_format should be either of these:
A string suitable for use as a format for method Time#strftime.
nil: the logger uses '%Y-%m-%dT%H:%M:%S.%6N'.
Returns the date-time format; see datetime_format=.
Returns a hash of the name/value pairs, to use in pattern matching.
Measure = Data.define(:amount, :unit) distance = Measure[10, 'km'] distance.deconstruct_keys(nil) #=> {:amount=>10, :unit=>"km"} distance.deconstruct_keys([:amount]) #=> {:amount=>10} # usage case distance in amount:, unit: 'km' # calls #deconstruct_keys underneath puts "It is #{amount} kilometers away" else puts "Don't know how to handle it" end # prints "It is 10 kilometers away"
Or, with checking the class, too:
case distance in Measure(amount:, unit: 'km') puts "It is #{amount} kilometers away" # ... end
Returns a hash of the named captures; each key is a capture name; each value is its captured string or nil:
m = /(?<foo>.)(.)(?<bar>.+)/.match("hoge") # => #<MatchData "hoge" foo:"h" bar:"ge"> m.named_captures # => {"foo"=>"h", "bar"=>"ge"} m = /(?<a>.)(?<b>.)/.match("01") # => #<MatchData "01" a:"0" b:"1"> m.named_captures #=> {"a" => "0", "b" => "1"} m = /(?<a>.)(?<b>.)?/.match("0") # => #<MatchData "0" a:"0" b:nil> m.named_captures #=> {"a" => "0", "b" => nil} m = /(?<a>.)(?<a>.)/.match("01") # => #<MatchData "01" a:"0" a:"1"> m.named_captures #=> {"a" => "1"}
If keyword argument symbolize_names is given a true value, the keys in the resulting hash are Symbols:
m = /(?<a>.)(?<a>.)/.match("01") # => #<MatchData "01" a:"0" a:"1"> m.named_captures(symbolize_names: true) #=> {:a => "1"}
Returns a hash of the named captures for the given names.
m = /(?<hours>\d{2}):(?<minutes>\d{2}):(?<seconds>\d{2})/.match("18:37:22") m.deconstruct_keys([:hours, :minutes]) # => {:hours => "18", :minutes => "37"} m.deconstruct_keys(nil) # => {:hours => "18", :minutes => "37", :seconds => "22"}
Returns an empty hash if no named captures were defined:
m = /(\d{2}):(\d{2}):(\d{2})/.match("18:37:22") m.deconstruct_keys(nil) # => {}
Returns a Method of superclass which would be called when super is used or nil if there is no method on superclass.
Returns a Method of superclass which would be called when super is used or nil if there is no method on superclass.