Group items tagged

"Configuration library for JVM languages. Overview implemented in plain Java with no dependencies extensive test coverage supports files in three formats: Java properties, JSON, and a human-friendly JSON superset merges multiple files across all formats can load from files, URLs, or classpath good support for "nesting" (treat any subtree of the config the same as the whole config) users can override the config with Java system properties, java -Dmyapp.foo.bar=10 supports configuring an app, with its framework and libraries, all from a single file such as application.conf parses duration and size settings, "512k" or "10 seconds" converts types, so if you ask for a boolean and the value is the string "yes", or you ask for a float and the value is an int, it will figure it out. JSON superset features: comments includes substitutions ("foo" : ${bar}, "foo" : Hello ${who}) properties-like notation (a.b=c) less noisy, more lenient syntax substitute environment variables This library limits itself to config files. If you want to load config from a database or something, you would need to write some custom code. The library has nice support for merging configurations so if you build one from a custom source it's easy to merge it in."

"Saddle is a data manipulation library for Scala that provides array-backed, indexed, one- and two-dimensional data structures that are judiciously specialized on JVM primitives to avoid the overhead of boxing and unboxing. Saddle offers vectorized numerical calculations, automatic alignment of data along indices, robustness to missing (N/A) values, and facilities for I/O. Saddle draws inspiration from several sources, among them the R programming language & statistical environment, the numpy and pandas Python libraries, and the Scala collections library."

"Kiama is a Scala library for language processing. It enables convenient analysis and transformation of structured data. The programming styles supported by the library are based on well-known formal language processing paradigms, including attribute grammars, tree rewriting, abstract state machines, and pretty printing."

"Raphaël is a small JavaScript library that should simplify your work with vector graphics on the web. If you want to create your own specific chart or image crop and rotate widget, for example, you can achieve it simply and easily with this library."

"Snappy is a compression/decompression library. It does not aim for maximum compression, or compatibility with any other compression library; instead, it aims for very high speeds and reasonable compression. For instance, compared to the fastest mode of zlib, Snappy is an order of magnitude faster for most inputs, but the resulting compressed files are anywhere from 20% to 100% bigger. On a single core of a Core i7 processor in 64-bit mode, Snappy compresses at about 250 MB/sec or more and decompresses at about 500 MB/sec or more. Snappy is widely used inside Google, in everything from BigTable and MapReduce to our internal RPC systems. (Snappy has previously been referred to as "Zippy" in some presentations and the likes.)"

"Scalding is a Scala library that makes it easy to specify Hadoop MapReduce jobs. Scalding is built on top of Cascading, a Java library that abstracts away low-level Hadoop details. Scalding is comparable to Pig, but offers tight integration with Scala, bringing advantages of Scala to your MapReduce jobs."

"This is an unofficial, community-maintained overview of third-party open source libraries written in Scala."

ScalaNLP is a suite of machine learning and numerical computing libraries. ScalaNLP is the umbrella project for Breeze and Epic. Breeze is a set of libraries for machine learning and numerical computing. Epic (coming soon) is a high-performance statistical parser.

"To demonstrate this idea, we'll create a wrapper component around Leaflet, an open source mapping JavaScript library created by Vladimir Agafonkin of Universal Mind. We'll use that wrapper component in an app that shows us a map and provides a button to move the map to a specified location."

"This library dynamically compiles scala source files and loads them as classes. Changed scala files will be recompiled and the changed class with be loaded. Multiple source paths are supported as well as compilation class path and class loading class paths (so that the scripts can load extra libraries). Classpath detection can be automatic (effectively using the classpath of the caller) or manual."

"Scalaz is a Scala library for functional programming. It provides purely functional data structures to complement those from the Scala standard library. It defines a set of foundational type classes (e.g. Functor, Monad) and corresponding instances for a large number of data structures."

"OSIN is an OAuth2 server library for the Go language, as specified at http://tools.ietf.org/html/rfc6749 and http://tools.ietf.org/html/draft-ietf-oauth-v2-10. Using it, you can build your own OAuth2 authentication service. The library implements the majority of the specification, like authorization and token endpoints, and authorization code, implicit, resource owner and client credentials grant types."

"Monocle is a Lens library, or more generally an Optics library. Optics are a set of purely functional abstractions to manipulate (get, set, modify) immutable objects. Optics compose between each other and particularly shine with nested objects."

"The Puzzle library is designed to quickly find visually similar images (GIF, PNG, JPG), even if they have been resized, recompressed, recolored or slightly modified. The library is free, lightweight yet very fast, configurable, easy to use and it has been designed with security in mind."

"Let the Scala compiler work for you. We provide type classes, instances, conversions, supplements to the standard library, and much more."

"Leaflet is a modern open-source JavaScript library for mobile-friendly interactive maps. It is developed by Vladimir Agafonkin with a team of dedicated contributors. Weighing just about 31 KB of JS, it has all the features most developers ever need for online maps. Leaflet is designed with simplicity, performance and usability in mind. It works efficiently across all major desktop and mobile platforms out of the box, taking advantage of HTML5 and CSS3 on modern browsers while still being accessible on older ones. It can be extended with many plugins, has a beautiful, easy to use and well-documented API and a simple, readable source code that is a joy to contribute to."

"sigma.js is an open-source lightweight JavaScript library to draw graphs, using the HTML canvas element. It has been especially designed to: Display interactively static graphs exported from a graph visualization software - like Gephi Display dynamically graphs that are generated on the fly"

"Protostuff is the stuff that leverages google's protobuf. A serialization library with built-in support for forward-backward compatibility (schema evolution) and validation. available formats: protostuff (native) graph (protostuff with support for cyclic references. See SerializingObjectGraphs) protobuf json smile (binary json useable from the protostuff-json module) xml yaml (ser only) kvp (binary uwsgi header) support for messages that are generated by the protostuff-compiler (java_bean) cyclic references via graph format see CompilerOptions for more customized compilation of .proto files support for existing pojos (See runtime schemas) cyclic references via graph format polymorphic (a nested message can be an interface/abstract class or even java.lang.Object) support for existing protoc-generated java messages see the io instructions for json, xml, yaml) no support for cyclic references (limitation of the builder pattern) Interoperability across various mobile platforms android kindle j2me (protostuff-me module) Transcoding support converts one encoding to another. See PipeUsage. Source and Sink protostuff, protobuf, json, json-numeric, smile, smile-numeric, xml Sink only yaml "

"A Scala Library for Scraping Page Metadata. Scraping metadata (e.g. title, description, url, etc.) from a URL is something that Facebook currently does for you when you paste a URL into the "Update Status" box. For a service that I'm currently building out, we wanted to do this as well for our users. Thus Metascraper was born. There was already a Ruby solution called link_thumbnailer, but since this is a I/O heavy operation, I knew I wanted to build a solution using tools that supported non-blocking I/O and could be used without getting caught in callback spaghetti. Scala, Akka, and the Play framework immediately came to mind."

"I published two such Tables of Elements about a year ago, click here to check them out. This one is a new one, focusing on machine learning libraries (R and Julia). And it is interactive, with access to the various libraries listed in the table, when clicking on an element (only on the original article)."