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Quick Way to Implement Dictionary in C
...*np;
for (np = hashtab[hash(s)]; np != NULL; np = np->next)
if (strcmp(s, np->name) == 0)
return np; /* found */
return NULL; /* not found */
}
char *strdup(char *);
/* install: put (name, defn) in hashtab */
struct nlist *install(char *name, char *defn)
{
struct...
Does delete on a pointer to a subclass call the base class destructor?
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The destructor of A will run when its lifetime is over. If you want its memory to be freed and the destructor run, you have to delete it if it was allocated on the heap. If it was allocated on the stack this happens automatically (i.e. when it goes out of scope; s...
How to see if an object is an array without using reflection?
How can I see in Java if an Object is an array without using reflection?
And how can I iterate through all items without using reflection?
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Delete an element from a dictionary
..., and also using linear space. For small dicts, this is not a problem. But if you're planning to make lots of copies of large dicts, you probably want a different data structure, like a HAMT (as described in this answer).
sh...
Batch file to delete files older than N days
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For more goodies, refer to An A-Z Index of the Windows XP command line.
If you don't have forfiles installed on your machine, copy it from any Windows Server 2003 to your Windows XP machine at %WinDir%\system32\. This is possible since the EXE is fully compatible between Windows Server 2003 ...
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...
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...
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....
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...