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This is an implementation of Rabin and Karp's streaming hash, as described in "Winnowing: Local Algorithms for Document Fingerprinting" by Schleimer, Wilkerson, and Aiken. Following the suggestion of Schleimer, I am using their second equation: $H[ $c[2..$k + 1] ] = (( $H[ $c[1..$k] ] - $c[1] ** $k ) + $c[$k+1] ) * $k The results of this hash encodes information about the next k values in the stream (hense k-gram.) This means for any given stream of length n integer values (or characters), you will get back n - k + 1 hash values. For best results, you will want to create a code generator that filters your data to remove all unnecessary information. For example, in a large english document, you should probably remove all white space, as well as removing all capitalization.

BibTeX::Parser is a pure perl BibTeX parser.

A Bloom filter is a probabilistic algorithm for doing existence tests in less memory than a full list of keys would require. The tradeoff to using Bloom filters is a certain configurable risk of false positives.

Quick CSS parser

CSS::Simple is an interface through which to read/write/manipulate CSS files while respecting the cascade order.

This module takes a list of CSS files and concatenates them, making sure to honor any valid @import statements included in the files. Following the CSS 2.1 spec, @import statements must be the first rules in a CSS file. Media-specific @import statements will be honored by enclosing the included file in an @media rule. This has the side effect of actually improving compatibility in Internet Explorer, which ignores media-specific @import rules but understands @media rules. It is possible that feature versions will include methods to compact whitespace and other parts of the CSS itself, but this functionality is not supported at the current time.

CSS::Tiny is a perl class to read and write .css stylesheets with as little code as possible, reducing load time and memory overhead. This module is primarily for reading and writing simple files, and anything we write shouldn't need to have documentation/comments. If you need something with more power, move up to CSS.pm. Hansjoerg Pehofer <hansjoerg.pehofer@uibk.ac.at>

RNV is an implementation of Relax NG Compact Syntax validator in ANSI C.

This module can be used, along with a CSS::Parse::* module, to parse CSS data and represent it as a tree of objects. Using a CSS::Adaptor::* module, the CSS data tree can then be transformed into other formats.

stringi (pronounced "stringy") is THE R package for fast, correct, consistent and convenient string/text processing in each locale and any native character encoding. The use of the ICU library gives R users a platform-independent set of functions known to Java, Perl, Python, PHP, and Ruby programmers.