The Ruby Programming Language

simple logging utility

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An implementation of Matrix and Vector classes

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Net::HTTP provides a rich library which can be used to build HTTP user-agents.

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Ruby client api for Internet Message Access Protocol

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This library provides functionality for retrieving email via POP3, the Post Office Protocol version 3. For details of POP3

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This library provides functionality to send internet mail via SMTP, the Simple Mail Transfer Protocol.

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The Observer pattern provides a simple mechanism for one object to inform a set of interested third-party objects when its state changes.

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OpenURI is an easy-to-use wrapper for Net::HTTP, Net::HTTPS and Net::FTP.

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Open3 gives you access to stdin, stdout, and stderr when running other programs.

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OptionParser is a class for command-line option analysis.

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