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README.md
Extractor
A simple utility to extract columns from CSV.
Usage and Examples
There are mainly two commands as of now, list
and extract
.
Usage: extractor <command>
Flags:
-h, --help Show context-sensitive help.
-v, --verbose Enable debug mode
--sep="comma" Separator to be used.
Commands:
list List CSV Columns
extract Extracts columns from CSV
Run "extractor <command> --help" for more information on a command.
List
This command helps to list the columns available.
Usage: extractor list <input>
List CSV Columns
Arguments:
<input> Input filename
Flags:
-h, --help Show context-sensitive help.
-v, --verbose Enable debug mode
--sep="comma" Separator to be used.
Example:
$❯ extractor list eng.4.csv
* Round
* Date
* Team 1
* FT
* Team 2
Extract
This command will start extracting the columns from the input file to output
file. If in debug mode, --count
specifies the update frequency to show progress
Usage: extractor extract <input> <output> <columns> ...
Extracts columns from CSV
Arguments:
<input> Input filename
<output> Output filename
<columns> ... Columns to extract
Flags:
-h, --help Show context-sensitive help.
-v, --verbose Enable debug mode
--sep="comma" Separator to be used.
--count=1000 Frequency to show progress
Example:
$❯ extractor extract eng.4.csv /dev/stdout "Team 1" "Team 2"
Team 1,Team 2
Barrow AFC,Stevenage FC
Bolton Wanderers FC,Forest Green Rovers FC
Bradford City AFC,Colchester United FC
Cambridge United FC,Carlisle United FC
Cheltenham Town FC,Morecambe FC
Walsall FC,Grimsby Town FC
Mansfield Town FC,Tranmere Rovers FC
Oldham Athletic AFC,Leyton Orient FC
Port Vale FC,Crawley Town FC
...
$❯ extractor extract eng.4.csv eng.4.teams.csv "Team 1" "Team 2" -v --count 10
Opening input file... eng.4.csv
Opening output file... eng.4.teams.csv
Starting extraction...
Extracted 553 records.
Finished.