A simple regex based exhaustive validator for PIN codes in India
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india-pincode-regex/HACKING.md

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Generating the regex

  1. Download the latest CSV file from https://data.gov.in/resources/all-india-pincode-directory-till-last-month.
  2. Copy all the pincodes to a pincodes.txt file
  3. Generate all unique pincodes by running sort -u pincodes.txt > /tmp/pin.txt
  4. npm install
  5. node src/generate.js /tmp/pin.txt > regex.txt

Generating the browser-version

  1. Make sure development dependencies are installed.
  2. npm run browserify.
  3. Test it by opening tests/index.html in your browser.

PHP Release

  1. git tag 1.2.3
  2. git push --tags

Ruby Development

After checking out the repo, run bin/setup to install dependencies. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.