Text::Scanner
Text::Scanner is a library to make it easy to scan text.
Installation
Add this line to your application's Gemfile:
gem 'text-scanner'And then execute:
$ bundle
Or install it yourself as:
$ gem install text-scanner
Usage
Creating a new Scanner object:
s = Text::Scanner.scan(INPUT)
Creates a new Scanner object, on INPUT, which is an IO
or String object. If INPUT is a string, it is treated as the source text
for the scanner object.
s = Text::Scanner.scan_file(FILE)
Creates a new Scanner object, on FILE, which is an IO object or the string
path to a text file. If FILE is a string path, the file object is opened
for the duration of the scan, and closed with s.close.
Using Scanner objects:
The following instance methods are available on the Text::Scanner object s:
| Method | Purpose |
|---|---|
s.gets |
get the next line of input |
s.ungets |
put back the most recent line of input |
s.read_line |
an alias for gets |
s.put_line |
an alias for ungets |
s.put_text(TEXT) |
put TEXT back into the input stream |
s.ungets(line) |
put back line as the next line of input |
| `s.each { | line |
| `s.map{ | line |
s.skip_until(PAT) |
skip lines of input until line matches PAT |
s.skip_while(PAT) |
skip lines of input while line matches PAT |
| `s.scan_while(PAT) { | line, match |
| `s.each_while(PAT) { | line |
| `s.map_while(PAT) { | line, match |
| `s.each_until(PAT) { | line |
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.
Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/aks/text-scanner. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.
Author & Contributors
Author: Alan K. Stebbens <[email protected]>
License
The gem is available as open source under the terms of the MIT License.
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