May 11, 2012

Ten Secret Key Bindings from OS X

Did you know that when using these applications: Any application on OS X, except Vim and MS products Bash, or any console program with Readline support These key bindings are available: Control-A - Move to beginning of line Control-E - Move to end of line Control-F - Move forward one column Control-B - Move backward one column Control-N - Move to next line Control-P - Move to previous line Control-D - Delete next character Control-H - Delete previous character Control-K - Delete from cursor to end of line Control-Y - Paste what was deleted with Control-K It seems silly, but the thing I love the most about OS X is the ubiquity of these key bindings.

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Apr 13, 2012

Injection

Within the world of application development, there is a conspiracy. $sql = "SELECT * FROM users WHERE username='" . $username . "'"; What’s wrong with this code? The problem is that $username needs to be escaped before it can be put into the SQL statement. If $username contains single quotes, the SQL statement will do something you did not intend. If you already know this, stick around, there’s more to this story.

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May 1, 2008

Clojure Tutorial for the Non-Lisp Programmer

I intend to keep this tutorial as accurate and up-to-date as possible. If you have any suggestions for changes, please leave a comment at the bottom of this page. Clojure is a functional lisp dialect that uses the Java Virtual Runtime as its platform. The language home page is at http://clojure.org/. Table of Contents A Quick Comparison Installing Clojure Atoms Vectors Lists Maps and Sets Defining Variables and Functions Special Forms Looping and Iterating Sequences Java Integration Using Libraries Additional Resources

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Jul 31, 2007

Ruby: Escape, Unescape, Encode, Decode, HTML, XML, URI, URL

This example shows you how to escape and un-escape a value to be included in a URI and within HTML. require 'cgi' # Escape data for URL query parameters name = "ruby?" value = "yes" url = "http://example.com/?" + CGI.escape(name) + '=' + CGI.escape(value) + "&var=T" # url: http://example.com/?ruby%3F=yes&var=T # Escape data for HTML url = "http://example.com/?ruby%3F=yes&var=T" html = %(<a href="#{CGI.escapeHTML(url)}">example</a>) # html: <a href="http://example.com/?ruby%3F=yes&amp;var=T">example</a> # Unescape HTML-escaped data url = CGI.

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Jan 11, 2006

Bookmarklet Compiler

What are bookmarklets? They’re small Javascripts, saved as browser bookmarks, that perform useful functions. Here’s my favorite bookmarklet site. It includes the bookmarklet that helped me develop my first Ajax applications: Javascript Shell. How do you make a bookmarklet? Write the javascript that you want to be the bookmarklet. Escape all the special URL characters, like space, parentheses, etc. Wrap the script in an anonymous Javascript function Wrap the function in a Javascript URL (javascript:.

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