(Ruby) Update CSV File

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.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# 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