Subclass of Zlib::Error
when zlib returns a Z_DATA_ERROR.
Usually if a stream was prematurely freed.
Objects of class File::Stat
encapsulate common status information for File
objects. The information is recorded at the moment the File::Stat
object is created; changes made to the file after that point will not be reflected. File::Stat
objects are returned by IO#stat
, File::stat
, File#lstat
, and File::lstat
. Many of these methods return platform-specific values, and not all values are meaningful on all systems. See also Kernel#test
.
exception to wait for writing by EAGAIN. see IO.select
.
exception to wait for writing by EWOULDBLOCK. see IO.select
.
exception to wait for writing by EINPROGRESS. see IO.select
.
Exception
raised when there is an invalid encoding detected
The error thrown when the parser encounters illegal CSV
formatting.
A CSV::Table instance represents CSV data. (see class CSV).
The instance may have:
Rows: each is a Table::Row object.
Headers: names for the columns.
CSV::Table has three groups of instance methods:
Its own internally defined instance methods.
Methods included by module Enumerable
.
Methods delegated to class Array
.:
Commonly, a new CSV::Table instance is created by parsing CSV source using headers:
source = "Name,Value\nfoo,0\nbar,1\nbaz,2\n" table = CSV.parse(source, headers: true) table.class # => CSV::Table
You can also create an instance directly. See ::new
.
If a table has headers, the headers serve as labels for the columns of data. Each header serves as the label for its column.
The headers for a CSV::Table object are stored as an Array of Strings.
Commonly, headers are defined in the first row of CSV source:
source = "Name,Value\nfoo,0\nbar,1\nbaz,2\n" table = CSV.parse(source, headers: true) table.headers # => ["Name", "Value"]
If no headers are defined, the Array is empty:
table = CSV::Table.new([]) table.headers # => []
CSV::Table provides three modes for accessing table data:
Row mode.
Column mode.
Mixed mode (the default for a new table).
The access mode for aCSV::Table instance affects the behavior of some of its instance methods:
Set
a table to row mode with method by_row!
:
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>
Specify a single row by an Integer index:
# Get a row. table[1] # => #<CSV::Row "Name":"bar" "Value":"1"> # Set a row, then get it. table[1] = CSV::Row.new(['Name', 'Value'], ['bam', 3]) table[1] # => #<CSV::Row "Name":"bam" "Value":3>
Specify a sequence of rows by a Range:
# Get rows. table[1..2] # => [#<CSV::Row "Name":"bam" "Value":3>, #<CSV::Row "Name":"baz" "Value":"2">] # Set rows, then get them. table[1..2] = [ CSV::Row.new(['Name', 'Value'], ['bat', 4]), CSV::Row.new(['Name', 'Value'], ['bad', 5]), ] table[1..2] # => [["Name", #<CSV::Row "Name":"bat" "Value":4>], ["Value", #<CSV::Row "Name":"bad" "Value":5>]]
Set
a table to column mode with method by_col!
:
source = "Name,Value\nfoo,0\nbar,1\nbaz,2\n" table = CSV.parse(source, headers: true) table.by_col! # => #<CSV::Table mode:col row_count:4>
Specify a column by an Integer index:
# Get a column. table[0] # Set a column, then get it. table[0] = ['FOO', 'BAR', 'BAZ'] table[0] # => ["FOO", "BAR", "BAZ"]
Specify a column by its String header:
# Get a column. table['Name'] # => ["FOO", "BAR", "BAZ"] # Set a column, then get it. table['Name'] = ['Foo', 'Bar', 'Baz'] table['Name'] # => ["Foo", "Bar", "Baz"]
In mixed mode, you can refer to either rows or columns:
An Integer index refers to a row.
A Range index refers to multiple rows.
A String index refers to a column.
Set
a table to mixed mode with method by_col_or_row!
:
source = "Name,Value\nfoo,0\nbar,1\nbaz,2\n" table = CSV.parse(source, headers: true) table.by_col_or_row! # => #<CSV::Table mode:col_or_row row_count:4>
Specify a single row by an Integer index:
# Get a row. table[1] # => #<CSV::Row "Name":"bar" "Value":"1"> # Set a row, then get it. table[1] = CSV::Row.new(['Name', 'Value'], ['bam', 3]) table[1] # => #<CSV::Row "Name":"bam" "Value":3>
Specify a sequence of rows by a Range:
# Get rows. table[1..2] # => [#<CSV::Row "Name":"bam" "Value":3>, #<CSV::Row "Name":"baz" "Value":"2">] # Set rows, then get them. table[1] = CSV::Row.new(['Name', 'Value'], ['bat', 4]) table[2] = CSV::Row.new(['Name', 'Value'], ['bad', 5]) table[1..2] # => [["Name", #<CSV::Row "Name":"bat" "Value":4>], ["Value", #<CSV::Row "Name":"bad" "Value":5>]]
Specify a column by its String header:
# Get a column. table['Name'] # => ["foo", "bat", "bad"] # Set a column, then get it. table['Name'] = ['Foo', 'Bar', 'Baz'] table['Name'] # => ["Foo", "Bar", "Baz"]
spell checker for a dictionary that has a tree structure, see doc/tree_spell_checker_api.md
Raised when the provided IP address is an invalid address.
Raised when the address family is invalid such as an address with an unsupported family, an address with an inconsistent family, or an address who’s family cannot be determined.
Raised when the address is an invalid length.