Results for: "remove_const"

Use Addrinfo.getaddrinfo instead. This method is deprecated for the following reasons:

• The 3rd element of the result is the address family of the first address. The address families of the rest of the addresses are not returned.

• gethostbyname() may take a long time and it may block other threads. (GVL cannot be released since gethostbyname() is not thread safe.)

• This method uses gethostbyname() function already removed from POSIX.

This method lookups host information by hostname.

TCPSocket.gethostbyname("localhost")
#=> ["localhost", ["hal"], 2, "127.0.0.1"]

Returns underlying string:

StringIO.open('foo') do |strio|
  p strio.string
  strio.string = 'bar'
  p strio.string
end

Output:

"foo"
"bar"

Related: StringIO#string= (assigns the underlying string).

Assigns the underlying string as other_string, and sets position to zero; returns other_string:

StringIO.open('foo') do |strio|
  p strio.string
  strio.string = 'bar'
  p strio.string
end

Output:

"foo"
"bar"

Related: StringIO#string (returns the underlying string).

Returns the string being scanned.

Changes the string being scanned to str and resets the scanner. Returns str.

Looks ahead to see if the pattern exists anywhere in the string, without advancing the scan pointer. This predicates whether a scan_until will return a value.

s = StringScanner.new('test string')
s.exist? /s/            # -> 3
s.scan /test/           # -> "test"
s.exist? /s/            # -> 2
s.exist? /e/            # -> nil

Sets the scan pointer to the previous position. Only one previous position is remembered, and it changes with each scanning operation.

s = StringScanner.new('test string')
s.scan(/\w+/)        # => "test"
s.unscan
s.scan(/../)         # => "te"
s.scan(/\d/)         # => nil
s.unscan             # ScanError: unscan failed: previous match record not exist

Returns a string that represents the StringScanner object, showing:

• the current position

• the size of the string

• the characters surrounding the scan pointer

  s = StringScanner.new(“Fri Dec 12 1975 14:39”) s.inspect # -> ‘#<StringScanner 0/21 @ “Fri D…”>’ s.scan_until /12/ # -> “Fri Dec 12” s.inspect # -> ‘#<StringScanner 10/21 “…ec 12” @ “ 1975…”>’

Returns current codepage.

WIN32OLE.codepage # => WIN32OLE::CP_ACP

Sets current codepage. The WIN32OLE.codepage is initialized according to Encoding.default_internal. If Encoding.default_internal is nil then WIN32OLE.codepage is initialized according to Encoding.default_external.

WIN32OLE.codepage = WIN32OLE::CP_UTF8
WIN32OLE.codepage = 65001

Returns a new String containing the hash entries:

h = {foo: 0, bar: 1, baz: 2}
h.inspect # => "{:foo=>0, :bar=>1, :baz=>2}"

Returns a copy of self with all nil-valued entries removed:

h = {foo: 0, bar: nil, baz: 2, bat: nil}
h1 = h.compact
h1 # => {:foo=>0, :baz=>2}

Returns self with all its nil-valued entries removed (in place):

h = {foo: 0, bar: nil, baz: 2, bat: nil}
h.compact! # => {:foo=>0, :baz=>2}

Returns nil if no entries were removed.

Returns the contents of the environment as a String:

ENV.replace('foo' => '0', 'bar' => '1')
ENV.inspect # => "{\"bar\"=>\"1\", \"foo\"=>\"0\"}"

Raises TypeError, because ENV is a wrapper for the process-wide environment variables and a clone is useless. Use to_h to get a copy of ENV data as a hash.

Returns “ARGF”.

Returns a String showing certain properties of self:

string = "Name,Value\nfoo,0\nbar,1\nbaz,2\n"
csv = CSV.new(string, headers: true)
s = csv.inspect
s # => "#<CSV io_type:StringIO encoding:UTF-8 lineno:0 col_sep:\",\" row_sep:\"\\n\" quote_char:\"\\\"\" headers:true>"

Sets optional filename and line number that will be used in ERB code evaluation and error reporting. See also filename= and lineno=

erb = ERB.new('<%= some_x %>')
erb.render
# undefined local variable or method `some_x'
#   from (erb):1

erb.location = ['file.erb', 3]
# All subsequent error reporting would use new location
erb.render
# undefined local variable or method `some_x'
#   from file.erb:4

Returns a network byte ordered string form of the IP address.

Returns a string containing a human-readable representation of the ipaddr. (“#<IPAddr: family:address/mask>”)

Creates an option from the given parameters params. See Parameters for New Options.

The block, if given, is the handler for the created option. When the option is encountered during command-line parsing, the block is called with the argument given for the option, if any. See Option Handlers.

Parses environment variable env or its uppercase with splitting like a shell.

env defaults to the basename of the program.

Returns a string representation of self:

Measure = Data.define(:amount, :unit)

distance = Measure[10, 'km']

p distance  # uses #inspect underneath
#<data Measure amount=10, unit="km">

puts distance  # uses #to_s underneath, same representation
#<data Measure amount=10, unit="km">

Returns a string representation of self:

m = /.$/.match("foo")
# => #<MatchData "o">
m.inspect # => "#<MatchData \"o\">"

m = /(.)(.)(.)/.match("foo")
# => #<MatchData "foo" 1:"f" 2:"o" 3:"o">
m.inspect # => "#<MatchData \"foo\" 1:\"f\" 2:\"o\

m = /(.)(.)?(.)/.match("fo")
# => #<MatchData "fo" 1:"f" 2:nil 3:"o">
m.inspect # => "#<MatchData \"fo\" 1:\"f\" 2:nil 3:\"o\">"

Related: MatchData#to_s.