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Guides and Overviews. Spark Programming Guide - Spark 1.5.2 Documentation. At a high level, every Spark application consists of a driver program that runs the user’s main function and executes various parallel operations on a cluster.

Spark Programming Guide - Spark 1.5.2 Documentation

The main abstraction Spark provides is a resilient distributed dataset (RDD), which is a collection of elements partitioned across the nodes of the cluster that can be operated on in parallel. RDDs are created by starting with a file in the Hadoop file system (or any other Hadoop-supported file system), or an existing Scala collection in the driver program, and transforming it. Users may also ask Spark to persist an RDD in memory, allowing it to be reused efficiently across parallel operations.

Finally, RDDs automatically recover from node failures. LaTeX/Mathematics. One of the greatest motivating forces for Donald Knuth when he began developing the original TeX system was to create something that allowed simple construction of mathematical formulae, while looking professional when printed.


The fact that he succeeded was most probably why TeX (and later on, LaTeX) became so popular within the scientific community. Typesetting mathematics is one of LaTeX's greatest strengths. It is also a large topic due to the existence of so much mathematical notation. If your document requires only a few simple mathematical formulas, plain LaTeX has most of the tools that you will need. If you are writing a scientific document that contains numerous complicated formulas, the amsmath package[1] introduces several new commands that are more powerful and flexible than the ones provided by LaTeX.

The IPython notebook — IPython 3.2.1 documentation. AsciiMath. Markdown Syntax Documentation. Note: This document is itself written using Markdown; you can see the source for it by adding ‘.text’ to the URL.

Markdown Syntax Documentation

Overview Philosophy Markdown is intended to be as easy-to-read and easy-to-write as is feasible. Readability, however, is emphasized above all else. A Markdown-formatted document should be publishable as-is, as plain text, without looking like it’s been marked up with tags or formatting instructions. To this end, Markdown’s syntax is comprised entirely of punctuation characters, which punctuation characters have been carefully chosen so as to look like what they mean. Inline HTML Markdown’s syntax is intended for one purpose: to be used as a format for writing for the web. Markdown is not a replacement for HTML, or even close to it.

For any markup that is not covered by Markdown’s syntax, you simply use HTML itself. The only restrictions are that block-level HTML elements — e.g. For example, to add an HTML table to a Markdown article: JavaScript and HTML DOM Reference. RegExp playground. Regular Expression Cheat Sheet (.NET Framework) HTML5 Tags Reference. Book. Android doc. Index of Files, Classes & Methods in Ruby 2.2.3 (Ruby 2.2.3) Ruby 2.2.3 New to Ruby?

Index of Files, Classes & Methods in Ruby 2.2.3 (Ruby 2.2.3)

You may find these links helpful: syntax, control expressions, assignment, methods, modules + classes, and operator precedence. Java Platform SE 7. Query Language Understood by SQLite. Small.

Query Language Understood by SQLite

Fast. Reliable.Choose any three. SQLite understands most of the standard SQL language. But it does omit some features while at the same time adding a few features of its own. This document attempts to describe precisely what parts of the SQL language SQLite does and does not support. The following syntax documentation topics are available: The routines sqlite3_prepare_v2(), sqlite3_prepare(), sqlite3_prepare16(), sqlite3_prepare16_v2(), sqlite3_exec(), and sqlite3_get_table() accept an SQL statement list (sql-stmt-list) which is a semicolon-separated list of statements. ASCII TABLE & ASCII CODES : HEXADECIMAL TABLE, DECIMAL TABLE, OCTAL TABLE, BINARY TABLE, KEYBOARD CORRESPONDENCES, EXTENDED ASCII TABLE, ... An A-Z Index of the Bash command line.

Commands marked • are bash built-ins Many commands particularly the Core Utils are also available under alternate shells (C shell, Korn shell etc).

An A-Z Index of the Bash command line

More bash commands: Linux Command Directory from O'Reilly, GNU CoreUtils.SS64 bash discussion forumLinks to other Sites, books etc. Unix / Linux Cheat Sheet. Python Reference Manual. Python 2.7 Quick Reference. Style chooser: Modern, Modern B&W, Modern Colored, Classic, High contrast or Printing [Hint: Use styles Modern B&W or Printing to print.

Python 2.7 Quick Reference

If you get problems, try printing the PDF versions instead] Contents Front matter Version 2.7 (What's new?) Check updates at Please report errors, inaccuracies and suggestions to Richard Gruet (pqr at Audacity Manual. Guide to the Audacity Project Window Tutorials Using Audacity Index, Glossary and More Links: Most links are to other pages in this Manual.

Audacity Manual

Bold italicized links are to a description in our Glossary. Screenshots: Unless otherwise stated, screenshots in this Manual are of Audacity running under its default settings on the Microsoft Windows 7® operating system. Copyright: Unless otherwise noted, all pages in this Manual are available under the terms of the Creative Commons Attribution 3.0 license.