Calls the given block once for each key, value pair in the database.
Returns self.
Returns the one-character string which cause Encoding::UndefinedConversionError.
ec = Encoding::Converter.new("ISO-8859-1", "EUC-JP") begin ec.convert("\xa0") rescue Encoding::UndefinedConversionError puts $!.error_char.dump #=> "\xC2\xA0" p $!.error_char.encoding #=> #<Encoding:UTF-8> end
Returns a conversion path.
p Encoding::Converter.search_convpath("ISO-8859-1", "EUC-JP")
#=> [[#<Encoding:ISO-8859-1>, #<Encoding:UTF-8>],
# [#<Encoding:UTF-8>, #<Encoding:EUC-JP>]]
p Encoding::Converter.search_convpath("ISO-8859-1", "EUC-JP", universal_newline: true)
or
p Encoding::Converter.search_convpath("ISO-8859-1", "EUC-JP", newline: :universal)
#=> [[#<Encoding:ISO-8859-1>, #<Encoding:UTF-8>],
# [#<Encoding:UTF-8>, #<Encoding:EUC-JP>],
# "universal_newline"]
p Encoding::Converter.search_convpath("ISO-8859-1", "UTF-32BE", universal_newline: true)
or
p Encoding::Converter.search_convpath("ISO-8859-1", "UTF-32BE", newline: :universal)
#=> [[#<Encoding:ISO-8859-1>, #<Encoding:UTF-8>],
# "universal_newline",
# [#<Encoding:UTF-8>, #<Encoding:UTF-32BE>]]
Iterates over keys and values. Note that unlike other collections, each without block isn’t supported.
Iterates over keys. Note that unlike other collections, each_key without block isn’t supported.
Iterates over values. Note that unlike other collections, each_value without block isn’t supported.
Returns a new Fiddle::Pointer instance at the memory address of the given name symbol.
Raises a DLError if the name doesn’t exist.
Calls the given block once for each byte in the stream.
Generate a sequence of checkbox elements, as a String.
The checkboxes will all have the same name attribute. Each checkbox is followed by a label. There will be one checkbox for each value. Each value can be specified as a String, which will be used both as the value of the VALUE attribute and as the label for that checkbox. A single-element array has the same effect.
Each value can also be specified as a three-element array. The first element is the VALUE attribute; the second is the label; and the third is a boolean specifying whether this checkbox is CHECKED.
Each value can also be specified as a two-element array, by omitting either the value element (defaults to the same as the label), or the boolean checked element (defaults to false).
checkbox_group("name", "foo", "bar", "baz") # <INPUT TYPE="checkbox" NAME="name" VALUE="foo">foo # <INPUT TYPE="checkbox" NAME="name" VALUE="bar">bar # <INPUT TYPE="checkbox" NAME="name" VALUE="baz">baz checkbox_group("name", ["foo"], ["bar", true], "baz") # <INPUT TYPE="checkbox" NAME="name" VALUE="foo">foo # <INPUT TYPE="checkbox" CHECKED NAME="name" VALUE="bar">bar # <INPUT TYPE="checkbox" NAME="name" VALUE="baz">baz checkbox_group("name", ["1", "Foo"], ["2", "Bar", true], "Baz") # <INPUT TYPE="checkbox" NAME="name" VALUE="1">Foo # <INPUT TYPE="checkbox" CHECKED NAME="name" VALUE="2">Bar # <INPUT TYPE="checkbox" NAME="name" VALUE="Baz">Baz checkbox_group("NAME" => "name", "VALUES" => ["foo", "bar", "baz"]) checkbox_group("NAME" => "name", "VALUES" => [["foo"], ["bar", true], "baz"]) checkbox_group("NAME" => "name", "VALUES" => [["1", "Foo"], ["2", "Bar", true], "Baz"])
Calls the block with each key/value pair:
res = Net::HTTP.get_response(hostname, '/todos/1') res.each_header do |key, value| p [key, value] if key.start_with?('c') end
Output:
["content-type", "application/json; charset=utf-8"] ["connection", "keep-alive"] ["cache-control", "max-age=43200"] ["cf-cache-status", "HIT"] ["cf-ray", "771d17e9bc542cf5-ORD"]
Returns an enumerator if no block is given.
Net::HTTPHeader#each is an alias for Net::HTTPHeader#each_header.
Calls the block with each field key:
res = Net::HTTP.get_response(hostname, '/todos/1') res.each_key do |key| p key if key.start_with?('c') end
Output:
"content-type" "connection" "cache-control" "cf-cache-status" "cf-ray"
Returns an enumerator if no block is given.
Net::HTTPHeader#each_name is an alias for Net::HTTPHeader#each_key.
Calls the block with each string field value:
res = Net::HTTP.get_response(hostname, '/todos/1') res.each_value do |value| p value if value.start_with?('c') end
Output:
"chunked" "cf-q-config;dur=6.0000002122251e-06" "cloudflare"
Returns an enumerator if no block is given.
Like each_header, but the keys are returned in capitalized form.
Net::HTTPHeader#canonical_each is an alias for Net::HTTPHeader#each_capitalized.
Invokes system, but silences all output.
Change the current process’s real and effective user ID to that specified by user. Returns the new user ID. Not available on all platforms.
[Process.uid, Process.euid] #=> [0, 0] Process::UID.change_privilege(31) #=> 31 [Process.uid, Process.euid] #=> [31, 31]
Exchange real and effective user IDs and return the new effective user ID. Not available on all platforms.
[Process.uid, Process.euid] #=> [0, 31] Process::UID.re_exchange #=> 0 [Process.uid, Process.euid] #=> [31, 0]
Returns true if the real and effective user IDs of a process may be exchanged on the current platform.
Change the current process’s real and effective group ID to that specified by group. Returns the new group ID. Not available on all platforms.
[Process.gid, Process.egid] #=> [0, 0] Process::GID.change_privilege(33) #=> 33 [Process.gid, Process.egid] #=> [33, 33]