Crystal vs. Haskell vs. jPDFWeb vs. python-sql Comparison Chart

Crystal’s syntax is heavily inspired by Ruby’s, so it feels natural to read and easy to write, and has the added benefit of a lower learning curve for experienced Ruby devs. Crystal is statically type-checked, so any type errors will be caught early by the compiler rather than fail on runtime. Moreover, and to keep the language clean, Crystal has built-in type inference, so most type annotations are unneeded. All types are non-nilable in Crystal, and available variables are represented as a union between the type and nil. As a consequence, the compiler will automatically check for null references in compile time. Crystal’s answer to metaprogramming is a powerful macro system, which ranges from basic templating and AST inspection to types inspection and running arbitrary external programs.

jPDFWeb is a Java library to convert PDF documents to SVG / HTML5. The library can save to the local file system or to an output stream to be able to serve the document directly to a client browser when working within a J2EE server. jPDFWeb is built on top of Qoppa’s proprietary PDF technology so you do not have to install any third party software or drivers. Since it is written in Java, it allows your application to remain platform independent and run on Windows, Linux, Unix (Solaris, HP UX, IBM AIX), Mac OS X and any other platform that supports the Java run-time environment. Features: -Convert PDF Documents to HTML5 / SVG -Convert Microsoft Word & Excel Documents to HTML5 (when combined with jOfficeConvert) -Convert Text -Convert Images -Convert Vector Graphics -Convert Annotations, Links and Form Field Data -Convert Digital Signature Validation Status -Export Page Thumbnails -Support for CJK fonts -Support for latest PDF format