Returns the value that determines whether unconverted fields are to be available; used for parsing; see {Option unconverted_fields}:
CSV.new('').unconverted_fields? # => nil
Returns an Array containing header converters; used for parsing; see Header Converters:
CSV.new('').header_converters # => []
Notes that you need to call +Ractor.make_shareable(CSV::HeaderConverters)+ on the main Ractor to use this method.
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
Processes fields with @converters, or @header_converters if headers is passed as true, returning the converted field set. Any converter that changes the field into something other than a String halts the pipeline of conversion for that field. This is primarily an efficiency shortcut.
Enters exclusive section and executes the block. Leaves the exclusive section automatically when the block exits. See example under MonitorMixin.
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 pre-uninstall hook that will be passed an Gem::Uninstaller instance and the spec that will be uninstalled when Gem::Uninstaller#uninstall is called
Copies IO stream src to IO stream dest via IO.copy_stream.
Related: methods for copying.
Copies IO stream src to IO stream dest via IO.copy_stream.
Related: methods for copying.
Returns the convertible integer type of the given type. You may optionally specify additional headers to search in for the type. convertible means actually the same type, or typedef’d from the same type.
If the type is an integer type and the convertible type is found, the following macros are passed as preprocessor constants to the compiler using the type name, in uppercase.
TYPEOF_, followed by the type name, followed by =X where “X” is the found convertible type name.
TYP2NUM and NUM2TYP, where TYP is the type name in uppercase with replacing an _t suffix with “T”, followed by =X where “X” is the macro name to convert type to an Integer object, and vice versa.
For example, if foobar_t is defined as unsigned long, then convertible_int("foobar_t") would return “unsigned long”, and define these macros:
#define TYPEOF_FOOBAR_T unsigned long #define FOOBART2NUM ULONG2NUM #define NUM2FOOBART NUM2ULONG
Quietly ensure the Gem directory dir contains all the proper subdirectories. If we can’t create a directory due to a permission problem, then we will silently continue.
If mode is given, missing directories are created with this mode.
World-writable directories will never be created.
Discard changes that have not been committed and revert the last commit
Cannot revert the first commit
Smushes logically “consecutive” lines
source = <<~'EOM' User. where(name: 'schneems'). first EOM lines = CleanDocument.new(source: source).join_consecutive!.lines expect(lines[0].to_s).to eq(source) expect(lines[1].to_s).to eq("")
The one known case this doesn’t handle is:
Ripper.lex <<~EOM a && b || c EOM
For some reason this introduces ‘on_ignore_newline` but with BEG type
Returns the number of decimal digits in self:
BigDecimal("0").precision # => 0 BigDecimal("1").precision # => 1 BigDecimal("1.1").precision # => 2 BigDecimal("3.1415").precision # => 5 BigDecimal("-1e20").precision # => 21 BigDecimal("1e-20").precision # => 20 BigDecimal("Infinity").precision # => 0 BigDecimal("-Infinity").precision # => 0 BigDecimal("NaN").precision # => 0
Returns true if self is a Monday, false otherwise.
Returns the integer month of the year for self, in range (1..12):
t = Time.new(2000, 1, 2, 3, 4, 5, 6) # => 2000-01-02 03:04:05 +000006 t.mon # => 1
Returns the integer month of the year for self, in range (1..12):
t = Time.new(2000, 1, 2, 3, 4, 5, 6) # => 2000-01-02 03:04:05 +000006 t.mon # => 1
Returns true if self represents a Monday, false otherwise:
t = Time.utc(2000, 1, 3) # => 2000-01-03 00:00:00 UTC t.monday? # => true
Related: Time#tuesday?, Time#wednesday?, Time#thursday?.