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
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1. Download the latest CSV file from <https://data.gov.in/resources/all-india-pincode-directory-till-last-month>.
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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.
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# 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](https://rubygems.org).