Inputs deflate_string into the inflate stream and returns the output from the stream. Calling this method, both the input and the output buffer of the stream are flushed. If string is nil, this method finishes the stream, just like Zlib::ZStream#finish.
If a block is given consecutive inflated chunks from the deflate_string are yielded to the block and nil is returned.
If a :buffer keyword argument is given and not nil:
The :buffer keyword should be a String, and will used as the output buffer. Using this option can reuse the memory required during inflation.
When not passing a block, the return value will be the same object as the :buffer keyword argument.
When passing a block, the yielded chunks will be the same value as the :buffer keyword argument.
Raises a Zlib::NeedDict exception if a preset dictionary is needed to decompress. Set the dictionary by Zlib::Inflate#set_dictionary and then call this method again with an empty string to flush the stream:
inflater = Zlib::Inflate.new begin out = inflater.inflate compressed rescue Zlib::NeedDict # ensure the dictionary matches the stream's required dictionary raise unless inflater.adler == Zlib.adler32(dictionary) inflater.set_dictionary dictionary inflater.inflate '' end # ... inflater.close
See also Zlib::Inflate.new
Same as IO.
Decompresses all gzip data in the io, handling multiple gzip streams until the end of the io. There should not be any non-gzip data after the gzip streams.
If a block is given, it is yielded strings of uncompressed data, and the method returns nil. If a block is not given, the method returns the concatenation of all uncompressed data in all gzip streams.
See Zlib::GzipReader documentation for a description.
See Zlib::GzipReader documentation for a description.
See Zlib::GzipReader documentation for a description.
See Zlib::GzipReader documentation for a description.
Returns the last access time for this file as an object of class Time.
File.stat("testfile").atime #=> Wed Dec 31 18:00:00 CST 1969
Returns true if the file is a character device, false if it isn’t or if the operating system doesn’t support this feature.
File.stat("/dev/tty").chardev? #=> true
Iterates over keys and objects in a weakly referenced object
Create an IO::Buffer for reading from file by memory-mapping the file. file_io should be a File instance, opened for reading.
Optional size and offset of mapping can be specified.
By default, the buffer would be immutable (read only); to create a writable mapping, you need to open a file in read-write mode, and explicitly pass flags argument without IO::Buffer::IMMUTABLE.
Example:
File.write('test.txt', 'test') buffer = IO::Buffer.map(File.open('test.txt'), nil, 0, IO::Buffer::READONLY) # => #<IO::Buffer 0x00000001014a0000+4 MAPPED READONLY> buffer.readonly? # => true buffer.get_string # => "test" buffer.set_string('b', 0) # `set_string': Buffer is not writable! (IO::Buffer::AccessError) # create read/write mapping: length 4 bytes, offset 0, flags 0 buffer = IO::Buffer.map(File.open('test.txt', 'r+'), 4, 0) buffer.set_string('b', 0) # => 1 # Check it File.read('test.txt') # => "best"
Note that some operating systems may not have cache coherency between mapped buffers and file reads.
If the buffer is mapped, meaning it references memory mapped by the buffer.
Mapped buffers are either anonymous, if created by ::new with the IO::Buffer::MAPPED flag or if the size was at least IO::Buffer::PAGE_SIZE, or backed by a file if created with ::map.
Mapped buffers can usually be resized, and such an operation will typically invalidate all slices, but not always.
Iterates over the buffer, yielding each value of data_type starting from offset.
If count is given, only count values will be yielded.
Example:
IO::Buffer.for("Hello World").each(:U8, 2, 2) do |offset, value| puts "#{offset}: #{value}" end # 2: 108 # 3: 108
Returns the path of this instruction sequence.
<compiled> if the iseq was evaluated from a string.
For example, using irb:
iseq = RubyVM::InstructionSequence.compile('num = 1 + 2') #=> <RubyVM::InstructionSequence:<compiled>@<compiled>> iseq.path #=> "<compiled>"
Using ::compile_file:
# /tmp/method.rb
def hello
puts "hello, world"
end
# in irb
> iseq = RubyVM::InstructionSequence.compile_file('/tmp/method.rb')
> iseq.path #=> /tmp/method.rb
Set path for which this cookie applies
Set domain for which this cookie applies
Store session data on the server. For some session storage types, this is a no-op.
Calls the block with each header-value pair; returns self:
source = "Name,Name,Name\nFoo,Bar,Baz\n" table = CSV.parse(source, headers: true) row = table[0] row.each {|header, value| p [header, value] }
Output:
["Name", "Foo"] ["Name", "Bar"] ["Name", "Baz"]
If no block is given, returns a new Enumerator:
row.each # => #<Enumerator: #<CSV::Row "Name":"Foo" "Name":"Bar" "Name":"Baz">:each>
Calls the block with each row or column; returns self.
When the access mode is :row or :col_or_row, calls the block with each CSV::Row object:
source = "Name,Value\nfoo,0\nbar,1\nbaz,2\n" table = CSV.parse(source, headers: true) table.by_row! # => #<CSV::Table mode:row row_count:4> table.each {|row| p row }
Output:
#<CSV::Row "Name":"foo" "Value":"0"> #<CSV::Row "Name":"bar" "Value":"1"> #<CSV::Row "Name":"baz" "Value":"2">
When the access mode is :col, calls the block with each column as a 2-element array containing the header and an Array of column fields:
table.by_col! # => #<CSV::Table mode:col row_count:4> table.each {|column_data| p column_data }
Output:
["Name", ["foo", "bar", "baz"]] ["Value", ["0", "1", "2"]]
Returns a new Enumerator if no block is given:
table.each # => #<Enumerator: #<CSV::Table mode:col row_count:4>:each>
Returns the path from an FTP URI.
RFC 1738 specifically states that the path for an FTP URI does not include the / which separates the URI path from the URI host. Example:
ftp://ftp.example.com/pub/ruby
The above URI indicates that the client should connect to ftp.example.com then cd to pub/ruby from the initial login directory.
If you want to cd to an absolute directory, you must include an escaped / (%2F) in the path. Example:
ftp://ftp.example.com/%2Fpub/ruby
This method will then return “/pub/ruby”.