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how to detect search engine bots with php?
...ectory of Spider names
Then you use $_SERVER['HTTP_USER_AGENT']; to check if the agent is said spider.
if(strstr(strtolower($_SERVER['HTTP_USER_AGENT']), "googlebot"))
{
// what to do
}
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Setting ANDROID_HOME enviromental variable on Mac OS X
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Where the Android-SDK is installed depends on how you installed it.
If you downloaded the SDK through their website and then dragged/dropped the Application to your Applications folder, it's most likely here:
/Applications/ADT/sdk (as it is in your case).
If you installed the SDK using Homeb...
Bitwise operation and usage
...k on multi-bit values, but conceptually one bit at a time.
AND is 1 only if both of its inputs are 1, otherwise it's 0.
OR is 1 if one or both of its inputs are 1, otherwise it's 0.
XOR is 1 only if exactly one of its inputs are 1, otherwise it's 0.
NOT is 1 only if its input is 0, otherwise it's ...
jQuery checkbox checked state changed event
...er or not the checkbox is checked:
$(".checkbox").change(function() {
if(this.checked) {
//Do stuff
}
});
The main benefit of binding to the change event over the click event is that not all clicks on a checkbox will cause it to change state. If you only want to capture events tha...
What is the proper way to check for null values?
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I dislike this because if you have any other type of object stuffed in the session than what you expect you may be hiding some subtle bugs in your program. I'd rather use a safe cast because I think it's likely to surface errors faster. It also a...
What is NODE_ENV and how to use it in Express?
...ication is run, it can check the value of the environment variable and do different things based on the value. NODE_ENV specifically is used (by convention) to state whether a particular environment is a production or a development environment. A common use-case is running additional debugging or lo...
How do I iterate through the files in a directory in Java?
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You can use File#isDirectory() to test if the given file (path) is a directory. If this is true, then you just call the same method again with its File#listFiles() outcome. This is called recursion.
Here's a basic kickoff example.
public static void main(String....
Why does base64 encoding require padding if the input length is not divisible by 3?
...e lost, as might happen, for example, in a very simple network protocol.
If unpadded strings are concatenated, it's impossible to recover the original data because information about the number of odd bytes at the end of each individual sequence is lost. However, if padded sequences are used, there...
optional local variables in rails partial templates: how do I get out of the (defined? foo) mess?
...g syntax in my partial templates to set default values for local variables if a value wasn't explicitly defined in the :locals hash when rendering the partial --
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What does [object Object] mean?
...y I'd be concerned that objects may not HAVE an id attribute; for example, if you got an object list just using a css selector like $('.someStyleClass'). To be clear on the identity of whatever object you're dealing with, it might be useful or at least interesting to assign your objects metadata usi...