Ruby

CSV Column Names

See more CSV Examples

Demonstrates how to access CSV column names.

The Chilkat CSV library/component/class is freeware. The downloads for .NET, C++, Perl, Java, Ruby, and Python contain all of the Chilkat classes, some of which are freeware and some of which require licensing.

Ruby

require 'chilkat'

success = false

# This example program loads a file (sample.csv)
# that contains this content:
# 
# year,color,country,food
# 2001,red,France,cheese
# 2005,blue,"United States",hamburger
# 2008,green,Italy,pasta
# 1998,orange,Japan,sushi
# 
# The first row contains the column names.
# This file is available at:
# http://www.chilkatsoft.com/testData/sample.csv

csv = Chilkat::CkCsv.new()

# Prior to loading the CSV file, indicate that the 1st row
# should be treated as column names:
csv.put_HasColumnNames(true)

# Load the CSV records from the file:

success = csv.LoadFile("sample.csv")
if (success != true)
    print csv.lastErrorText() + "\n";
    exit
end

# Display the column names:

for i in 0 .. csv.get_NumColumns() - 1
    colName = csv.getColumnName(i)
    print i.to_s() + ": " + colName + "\n";

    # The following line demonstrates to to get the column
    # index given a column name:
    idx = csv.GetIndex(colName)
    print colName + " is at column index " + idx.to_s() + "\n";
end