Ruby

Update CSV File

See more CSV Examples

Demonstrates how to read a CSV, update some cells, and save.

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

# Change "cheese" to "baguette"
# ("cheese" is at row=0, column=3
success = csv.SetCell(0,3,"baguette")

# Change "blue" to "magenta"
success = csv.SetCell(1,1,"magenta")

# Write the updated CSV to a string and display:

csvDoc = csv.saveToString()
print csvDoc + "\n";

# Save the CSV to a file:
success = csv.SaveFile("out.csv")
if (success != true)
    print csv.lastErrorText() + "\n";
end