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instance method

CSV::Table#by_row

table.by_row → table_dup

# File tmp/rubies/ruby-3.1.3/lib/csv/table.rb, line 318
def by_row
  self.class.new(@table.dup).by_row!
end

Returns a duplicate of self, in row mode (see Row Mode):

Example

source = "Name,Value\nfoo,0\nbar,1\nbaz,2\n"
table = CSV.parse(source, headers: true)
table.mode # => :col_or_row
dup_table = table.by_row
dup_table.mode # => :row
dup_table.equal?(table) # => false # It's a dup

This may be used to chain method calls without changing the mode (but also will affect performance and memory usage):

Example

dup_table.by_row[1]

Also note that changes to the duplicate table will not affect the original.

See also #by_row! #by_col_or_row! #by_col_or_row #delete also in 3.3 · 3.2 · 3.0

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