How do I tell if a file does not exist in bash?

I've used the following script to see if a file exists:

In the bash script how do I know the script file name?

How can I determine the name of the bash script file inside the script itself?

How do I prompt for input in a Linux shell script?

I want to pause input in a shell script, and prompt the user for choices. The standard 'Yes, No, or Cancel' type question. How do I accomplish this at a typical bash prompt?

Split string based on delimiter in Bash?

How do I split a string based on a delimiter in Bash?

sl4a python notify question

I have two questions regarding the sl4a scripting language. I'd like to develop a python script that will be periodically contacted by a server and post some information to the notification bar.

Is there a tool to diff/merge/sort localizable strings files?

Localizable strings file which are used for Apple/iPhone apps localization have the following format:

"eval” in Scala

Can Scala be used to script a Java application?

I need to load a piece of Scala code from Java, set up an execution scope for it (data exposed by the host application), evaluate it and retrieve a result object from it.

How do you use scripting language (PHP, Python, etc) to improve your productivity?

I'm a Delphi developer on the Windows platform, recently read the PHP tutorial at W3CSchools, it looks interesting.

monkey runner random generation

When I want to input some character I do it like this