Use Brace Expansion to Rename Files

Today I Learned you can use brace expansion to rename files in the command line (it works in both bash and zsh).

Brace expansion allows you to generate strings sharing a common prefix or suffix - perfect for moving/renaming files:

To copy someFile.js to someFile.ts, you can run:

$ cp someFile.{js,ts}
# expands to:
$ cp someFile.js someFile.ts

To rename app/model/blog_test.rb to app/model/blog_spec.rb:

$ mv app/model/blog_{test,spec}.rb
# expands to:
mv app/model/blog_test.rb app/model/blog_spec.rb

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