Diet Coda from Panic, Inc., is a must-have iPad app for Web developers and anyone who needs secure remote access to servers. The $19.99 app provides a contextual adaptive code editor along with powerful remote file management and an SSH terminal. The terminal component is also available as a separate $7.99 app named Prompt. The app's overall ease of use and the code editor's adaptive keyboard that tunes itself to programming languages makes it fast and easy to work with remote files.
Diet Coda can work with multiple servers. Remote code editing using FTP/SFTP and SSH terminal access are configured separately, even when using the same server. An identiying name can be assigned to identify each server. The usual information required for remote FTP access is provided in the rest of the configuration screen. Ports other than the standard TCP port 21 for FTP are supported.
Diet Coda's keyboard (see below) adds several keys to the visual keyboard that are very important to programmers such as undo, indent, and left-and-right cursor movement keys. (For more screenshots, see our Diet Coda slide show.)
When in the mode to work with PHP code, it also displays additional keys such as "//" (line comment), ";", and "$" that are specificially useful for PHP coding. This eliminates the need to switch to the symbols-plus-numerals key view, helping maintain coding rhythm. The app also provides support for storing blocks of code in clips. Several are predefined for the PHP code mode.
The SSH remote terminal component also has its own custom keyboard. Diet Coda works with Bluetooth wireless keyboards too, and this is a big advantage as it opens up a great deal of screen real estate for file contents. Note that Diet Coda is not limited for remote work with UNIX and Linux servers. Apple's Mac OS X includes an SSH server for remote access. And, there are free Open Source SSH servers that can be used with Microsoft Windows Server, too. freeSSHd is the one I use with Microsoft Windows. It has improved quite a bit since I first used it back in 2008. For example, you can work with Microsoft PowerShell from your iPad.
Once you are in the editor, Diet Coda interprets what you type and displays possible completions for code words and function names. If a recognized function is typed, Diet Coda displays the function's input variable type.
Panic promotes Diet Coda with the tag line "Make quick web fixes to go." However, I have found it to be potentially much more useful than that in the few days I have used it. The adaptive keyboard layouts, code completion, and Bluetooth keyboard support works well for coding sessions longer than just a quick fix. Pairing it with reference documentation on a companion smartphone or, somewhat ironically, an Amazon Kindle, might convince some developers to leave their notebook behind.
Code completion suggestions provided.
Code snippets (clips) feature available.
SSH terminal provided for secure remote shell access.
Powerful file and directory management provided.
No direct support for Perl, Python, and other popular dynamic languages.
SSH terminal only allows access to one server. The iPad must be rebooted to access a different server.
Editor does not provide auto-indent.
Detects code type for Ruby but not PHP.
Does not provide preset code snippets for Ruby.
Does not provide special keys for Ruby.
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