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Lua

CSV Delete Column

Demonstrates the DeleteColumn method.

Chilkat Lua Downloads

Download Chilkat for Lua
Lua 
local chilkat = require("chilkat")

-- We have the following CSV...

-- permalink,company,numEmps,category,city,state,fundedDate,raisedAmt,raisedCurrency,round
-- lifelock,LifeLock,,web,Tempe,AZ,1-May-07,6850000,USD,b
-- mycityfaces,MyCityFaces,7,web,Scottsdale,AZ,1-Jan-08,50000,USD,seed
-- flypaper,Flypaper,,web,Phoenix,AZ,1-Feb-08,3000000,USD,a
-- infusionsoft,Infusionsoft,105,software,Gilbert,AZ,1-Oct-07,9000000,USD,a
-- gauto,gAuto,4,web,Scottsdale,AZ,1-Jan-08,250000,USD,seed
-- chosenlist-com,ChosenList.com,5,web,Scottsdale,AZ,1-Oct-06,140000,USD,seed
-- digg,Digg,60,web,San Francisco,CA,1-Oct-05,2800000,USD,a
-- facebook,Facebook,450,web,Palo Alto,CA,1-Sep-04,500000,USD,angel
-- facebook,Facebook,450,web,Palo Alto,CA,1-May-05,12700000,USD,a
-- photobucket,Photobucket,60,web,Palo Alto,CA,1-May-06,10500000,USD,b
-- omnidrive,Omnidrive,,web,Palo Alto,CA,1-Dec-06,800000,USD,angel
-- geni,Geni,18,web,West Hollywood,CA,1-Jan-07,1500000,USD,a
-- twitter,Twitter,17,web,San Francisco,CA,1-Jul-07,5400000,USD,b
-- stumbleupon,StumbleUpon,,web,San Francisco,CA,1-Dec-05,1500000,USD,seed
-- gizmoz,Gizmoz,,web,Menlo Park,CA,1-May-07,6300000,USD,a
-- mahalo,Mahalo,40,web,Santa Monica,CA,1-Jan-06,5000000,USD,a

local bCrlf = true
local sb = chilkat.StringBuilder.new()
sb:append_line("permalink,company,numEmps,category,city,state,fundedDate,raisedAmt,raisedCurrency,round", bCrlf)
sb:append_line("lifelock,LifeLock,,web,Tempe,AZ,1-May-07,6850000,USD,b", bCrlf)
sb:append_line("mycityfaces,MyCityFaces,7,web,Scottsdale,AZ,1-Jan-08,50000,USD,seed", bCrlf)
sb:append_line("flypaper,Flypaper,,web,Phoenix,AZ,1-Feb-08,3000000,USD,a", bCrlf)
sb:append_line("infusionsoft,Infusionsoft,105,software,Gilbert,AZ,1-Oct-07,9000000,USD,a", bCrlf)
sb:append_line("gauto,gAuto,4,web,Scottsdale,AZ,1-Jan-08,250000,USD,seed", bCrlf)
sb:append_line("chosenlist-com,ChosenList.com,5,web,Scottsdale,AZ,1-Oct-06,140000,USD,seed", bCrlf)
sb:append_line("digg,Digg,60,web,San Francisco,CA,1-Oct-05,2800000,USD,a", bCrlf)
sb:append_line("facebook,Facebook,450,web,Palo Alto,CA,1-Sep-04,500000,USD,angel", bCrlf)
sb:append_line("facebook,Facebook,450,web,Palo Alto,CA,1-May-05,12700000,USD,a", bCrlf)
sb:append_line("photobucket,Photobucket,60,web,Palo Alto,CA,1-May-06,10500000,USD,b", bCrlf)
sb:append_line("omnidrive,Omnidrive,,web,Palo Alto,CA,1-Dec-06,800000,USD,angel", bCrlf)
sb:append_line("geni,Geni,18,web,West Hollywood,CA,1-Jan-07,1500000,USD,a", bCrlf)
sb:append_line("twitter,Twitter,17,web,San Francisco,CA,1-Jul-07,5400000,USD,b", bCrlf)
sb:append_line("stumbleupon,StumbleUpon,,web,San Francisco,CA,1-Dec-05,1500000,USD,seed", bCrlf)
sb:append_line("gizmoz,Gizmoz,,web,Menlo Park,CA,1-May-07,6300000,USD,a", bCrlf)
sb:append_line("mahalo,Mahalo,40,web,Santa Monica,CA,1-Jan-06,5000000,USD,a", bCrlf)

local csv = chilkat.Csv.new()

-- Indicate that the 1st line contains column names.
csv.has_column_names = true
local success = csv:load_from_string(sb:get_as_string())

-- Delete the "city" column, which is at index 4.  (the 1st column is at index 0)
success = csv:delete_column(4)

print(csv:save_to_string())

-- Output is:

-- permalink,company,numEmps,category,state,fundedDate,raisedAmt,raisedCurrency,round
-- lifelock,LifeLock,,web,AZ,1-May-07,6850000,USD,b
-- mycityfaces,MyCityFaces,7,web,AZ,1-Jan-08,50000,USD,seed
-- flypaper,Flypaper,,web,AZ,1-Feb-08,3000000,USD,a
-- infusionsoft,Infusionsoft,105,software,AZ,1-Oct-07,9000000,USD,a
-- gauto,gAuto,4,web,AZ,1-Jan-08,250000,USD,seed
-- chosenlist-com,ChosenList.com,5,web,AZ,1-Oct-06,140000,USD,seed
-- digg,Digg,60,web,CA,1-Oct-05,2800000,USD,a
-- facebook,Facebook,450,web,CA,1-Sep-04,500000,USD,angel
-- facebook,Facebook,450,web,CA,1-May-05,12700000,USD,a
-- photobucket,Photobucket,60,web,CA,1-May-06,10500000,USD,b
-- omnidrive,Omnidrive,,web,CA,1-Dec-06,800000,USD,angel
-- geni,Geni,18,web,CA,1-Jan-07,1500000,USD,a
-- twitter,Twitter,17,web,CA,1-Jul-07,5400000,USD,b
-- stumbleupon,StumbleUpon,,web,CA,1-Dec-05,1500000,USD,seed
-- gizmoz,Gizmoz,,web,CA,1-May-07,6300000,USD,a
-- mahalo,Mahalo,40,web,CA,1-Jan-06,5000000,USD,a