This returns the value that scan would return, without advancing the scan pointer. The match register is affected, though.
s = StringScanner.new("Fri Dec 12 1975 14:39") s.check /Fri/ # -> "Fri" s.pos # -> 0 s.matched # -> "Fri" s.check /12/ # -> nil s.matched # -> nil
Mnemonic: it “checks” to see whether a scan will return a value.
Iterates over each item of OLE collection which has IEnumVARIANT interface.
excel = WIN32OLE.new('Excel.Application') book = excel.workbooks.add sheets = book.worksheets(1) cells = sheets.cells("A1:A5") cells.each do |cell| cell.value = 10 end
Returns the type library file path.
tlib = WIN32OLE_TYPELIB.new('Microsoft Excel 9.0 Object Library') puts tlib.path #-> 'C:\...\EXCEL9.OLB'
Calls block once for each key in hsh, passing the key-value pair as parameters.
If no block is given, an enumerator is returned instead.
h = { "a" => 100, "b" => 200 } h.each {|key, value| puts "#{key} is #{value}" }
produces:
a is 100 b is 200
Adds the contents of other_hash to hsh. If no block is specified, entries with duplicate keys are overwritten with the values from other_hash, otherwise the value of each duplicate key is determined by calling the block with the key, its value in hsh and its value in other_hash.
h1 = { "a" => 100, "b" => 200 } h2 = { "b" => 254, "c" => 300 } h1.merge!(h2) #=> {"a"=>100, "b"=>254, "c"=>300} h1 #=> {"a"=>100, "b"=>254, "c"=>300} h1 = { "a" => 100, "b" => 200 } h2 = { "b" => 254, "c" => 300 } h1.merge!(h2) { |key, v1, v2| v1 } #=> {"a"=>100, "b"=>200, "c"=>300} h1 #=> {"a"=>100, "b"=>200, "c"=>300}
Returns a new array that is a one-dimensional flattening of this hash. That is, for every key or value that is an array, extract its elements into the new array. Unlike Array#flatten, this method does not flatten recursively by default. The optional level argument determines the level of recursion to flatten.
a = {1=> "one", 2 => [2,"two"], 3 => "three"} a.flatten # => [1, "one", 2, [2, "two"], 3, "three"] a.flatten(2) # => [1, "one", 2, 2, "two", 3, "three"]
Yields each environment variable name and value.
If no block is given an Enumerator is returned.
Adds the contents of hash to the environment variables. If no block is specified entries with duplicate keys are overwritten, otherwise the value of each duplicate name is determined by calling the block with the key, its value from the environment and its value from the hash.
Returns an enumerator which iterates over each line (separated by sep, which defaults to your platform’s newline character) of each file in ARGV. If a block is supplied, each line in turn will be yielded to the block, otherwise an enumerator is returned. The optional limit argument is an Integer specifying the maximum length of each line; longer lines will be split according to this limit.
This method allows you to treat the files supplied on the command line as a single file consisting of the concatenation of each named file. After the last line of the first file has been returned, the first line of the second file is returned. The ARGF.filename and ARGF.lineno methods can be used to determine the filename of the current line and line number of the whole input, respectively.
For example, the following code prints out each line of each named file prefixed with its line number, displaying the filename once per file:
ARGF.each_line do |line| puts ARGF.filename if ARGF.file.lineno == 1 puts "#{ARGF.file.lineno}: #{line}" end
While the following code prints only the first file’s name at first, and the contents with line number counted through all named files.
ARGF.each_line do |line| puts ARGF.filename if ARGF.lineno == 1 puts "#{ARGF.lineno}: #{line}" end
This is a deprecated alias for each_char.
Reads the next character from ARGF and returns it as a String. Returns nil at the end of the stream.
ARGF treats the files named on the command line as a single file created by concatenating their contents. After returning the last character of the first file, it returns the first character of the second file, and so on.
For example:
$ echo "foo" > file $ ruby argf.rb file ARGF.getc #=> "f" ARGF.getc #=> "o" ARGF.getc #=> "o" ARGF.getc #=> "\n" ARGF.getc #=> nil ARGF.getc #=> nil
Reads the next character from ARGF and returns it as a String. Raises an EOFError after the last character of the last file has been read.
For example:
$ echo "foo" > file $ ruby argf.rb file ARGF.readchar #=> "f" ARGF.readchar #=> "o" ARGF.readchar #=> "o" ARGF.readchar #=> "\n" ARGF.readchar #=> end of file reached (EOFError)
If obj is Numeric, write the character whose code is the least-significant byte of obj. If obj is String, write the first character of obj to ios. Otherwise, raise TypeError.
$stdout.putc "A" $stdout.putc 65
produces:
AA
Returns the current filename. “-” is returned when the current file is STDIN.
For example:
$ echo "foo" > foo $ echo "bar" > bar $ echo "glark" > glark $ ruby argf.rb foo bar glark ARGF.filename #=> "foo" ARGF.read(5) #=> "foo\nb" ARGF.filename #=> "bar" ARGF.skip ARGF.filename #=> "glark"
Returns a Hash containing implementation-dependent counters inside the VM.
This hash includes information about method/constant cache serials:
{
:global_method_state=>251,
:global_constant_state=>481,
:class_serial=>9029
}
The contents of the hash are implementation specific and may be changed in the future.
This method is only expected to work on C Ruby.
This method is intended as the primary interface for reading CSV files. You pass a path and any options you wish to set for the read. Each row of file will be passed to the provided block in turn.
The options parameter can be anything CSV::new() understands. This method also understands an additional :encoding parameter that you can use to specify the Encoding of the data in the file to be read. You must provide this unless your data is in Encoding::default_external(). CSV will use this to determine how to parse the data. You may provide a second Encoding to have the data transcoded as it is read. For example, encoding: "UTF-32BE:UTF-8" would read UTF-32BE data from the file but transcode it to UTF-8 before CSV parses it.
This method wraps a String you provide, or an empty default String, in a CSV object which is passed to the provided block. You can use the block to append CSV rows to the String and when the block exits, the final String will be returned.
Note that a passed String is modified by this method. Call dup() before passing if you need a new String.
The options parameter can be anything CSV::new() understands. This method understands an additional :encoding parameter when not passed a String to set the base Encoding for the output. CSV needs this hint if you plan to output non-ASCII compatible data.
Yields each row of the data source in turn.
Support for Enumerable.
The data source must be open for reading.
Explicitly terminate option processing.
Returns true if option processing has terminated, false otherwise.
Iterator version of ‘get’.
The block is called repeatedly with two arguments: The first is the option name. The second is the argument which followed it (if any). Example: (‘–opt’, ‘value’)
The option name is always converted to the first (preferred) name given in the original options to GetoptLong.new.
Returns a new ipaddr built by masking IP address with the given prefixlen/netmask. (e.g. 8, 64, “255.255.255.0”, etc.)
Returns true if the ipaddr is a private address. IPv4 addresses in 10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/16 as defined in RFC 1918 and IPv6 Unique Local Addresses in fc00::/7 as defined in RFC 4193 are considered private.
Returns a new ipaddr built by converting the IPv6 address into a native IPv4 address. If the IP address is not an IPv4-mapped or IPv4-compatible IPv6 address, returns self.