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How to check whether an array is empty using PHP?
... create an array with database column names as the keys but no values/data from the database), then the array will NOT be empty().
In this case, you can loop the array in a foreach, testing if each key has a value. This is a good method if you need to run through the array anyway, perhaps checkin...
Detect 7 inch and 10 inch tablet programmatically
...ayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
From this, we can get the information required to size the display:
int widthPixels = metrics.widthPixels;
int heightPixels = metrics.heightPixels;
This will return the absolute value of the width and the height in pixels,...
How do I delete an exported environment variable?
...enerally, each time a terminal window is opened, it will load up variables from various places such as ~/.bashrc, ~/.profile, etc. Any variables you set in one terminal instance will not carry over to another. If you have a variable which seems to be set automatically every time you open terminal, t...
Determine if a function exists in bash
Currently I'm doing some unit tests which are executed from bash. Unit tests are initialized, executed and cleaned up in a bash script. This script usualy contains an init(), execute() and cleanup() functions. But they are not mandatory. I'd like to test if they are or are not defined.
...
What causes java.lang.IncompatibleClassChangeError?
...any java.lang.IncompatibleClassChangeError s when I try to invoke methods from it. These errors seem to appear at random. What kinds of problems could be causing this error?
...
What is the most efficient Java Collections library? [closed]
...
From inspection, it looks like Trove is just a library of collections for primitive types - it's not like it's meant to be adding a lot of functionality over the normal collections in the JDK.
Personally (and I'm biased) I l...
Check if a JavaScript string is a URL
...ed question with an answer:
Javascript regex URL matching
Or this Regexp from Devshed:
function validURL(str) {
var pattern = new RegExp('^(https?:\\/\\/)?'+ // protocol
'((([a-z\\d]([a-z\\d-]*[a-z\\d])*)\\.)+[a-z]{2,}|'+ // domain name
'((\\d{1,3}\\.){3}\\d{1,3}))'+ // OR ip (v4) addre...
What is the Python equivalent of static variables inside a function?
...e function is called and not when the module is executed or when something from it is imported, which is the case if you use the decorator approach from the currently accepted answer. See Python decorator function execution. If you have a huge library module then every decorator will be run, includi...
Heroku “psql: FATAL: remaining connection slots are reserved for non-replication superuser connectio
...dically, I get this error message when trying to access the database, both from the CLI and from loading a page on the server:
...
I want to remove double quotes from a String
...(str.length -1). substr expects 2 arguments, where the first is the offset from which the substring starts, the second is its length. Since we don't want the last char, anymore than we want the first, that length is str.length - 2. Easy-peazy.
Tips:
More on lookaround assertions can be found here
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