CSV::Row#index

index(header) → index

index(header, offset) → index

# File tmp/rubies/ruby-3.3.0/lib/csv/row.rb, line 573
def index(header, minimum_index = 0)
  # find the pair
  index = headers[minimum_index..-1].index(header)
  # return the index at the right offset, if we found one
  index.nil? ? nil : index + minimum_index
end

Returns the index for the given header, if it exists; otherwise returns nil.

With the single argument header, returns the index of the first-found field with the given header:

Example

source = "Name,Name,Name\nFoo,Bar,Baz\n"
table = CSV.parse(source, headers: true)
row = table[0]
row.index('Name') # => 0
row.index('NAME') # => nil

With arguments header and offset, returns the index of the first-found field with given header, but ignoring the first offset fields:

Example

row.index('Name', 1) # => 1
row.index('Name', 3) # => nil

See also #include? #initialize_copy #headers #inspect also in 3.2 · 3.1 · 3.0

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