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How much faster is Redis than mongoDB?
...ared to Redis RPUSH, then it becames incredibly slow, probably the mongodb array type has linear insertion time and so it becomes slower and slower. mongodb might gain a bit of performances by exposing a constant time insertion list type, but even with the linear time array type (which can guarantee...
hash function for string
... from the return statement if you plan on doing the modulus sizing-to-your-array-length outside the hash algorithm. Also, I recommend you make the return and "hashval" type unsigned long instead of the simple unsigned (int).
unsigned hash(char *s)
{
unsigned hashval;
for (hashval = 0; *s !...
Are there any cases when it's preferable to use a plain old Thread object instead of one of the newe
...e more special classes.
In a similar vein, .NET doesn't forbid the use of arrays, despite List<T> being a better fit for many cases where people use arrays. Simply because you may still want to build things that are not covered by the standard lib.
...
How do I pass the this context to a function?
...ed list if you're passing arguments to your function and .apply() needs an array.
myfunc.call(obj_a, 1, 2, 3);
myfunc.apply(obj_a, [1, 2, 3]);
Therefore, you can easily write a function hook by using the apply() method. For instance, we want to add a feature to jQuerys .css() method. We can store...
Using str_replace so that it only acts on the first match?
...en from the comments at PHP.net/str_replace
// Splits $subject into an array of 2 items by $find,
// and then joins the array with $replace
return implode($replace, explode($find, $subject, 2));
}
share
...
Programmatically Request Access to Contacts
...nged)
{
{
self.isContactsChanged=NO;
CFArrayRef allPeople = ABAddressBookCopyArrayOfAllPeople(addressBook);
ABAddressBookRegisterExternalChangeCallback(addressBook, addressBookChanged, self);
int allPeopleCount = CFArrayGetCount(allPeople...
Row count with PDO
...urns a string "1234" ... your EDIT has echo count($nRows); - count() is an array function :P. I'd also recommend type casting the result from fetchColumn() to an integer. $count = (int) $stmt->fetchColumn()
– Cobby
May 26 '11 at 23:59
...
Wait until all jQuery Ajax requests are done?
...s), it can still be done but is just a little bit trickier. See Pass in an array of Deferreds to $.when() (and maybe jQuery .when troubleshooting with variable number of arguments).
If you need deeper control over the failure modes of the ajax scripts etc., you can save the object returned by .when...
Try-finally block prevents StackOverflowError
....consumeAlmostAllStack(Main.java:21)
...
The code:
import java.util.Arrays;
import java.util.Collections;
public class Main {
static int[] orderOfOperations = new int[2048];
static int operationsCount = 0;
static StackOverflowError fooKiller;
static Error wontReachHere = new Error("Wo...
Why is argc not a constant?
... shall be a null pointer.
If the value of argc is greater than zero, the array members argv[0] through
argv[argc-1] inclusive shall contain pointers to strings, which are given
implementation-defined values by the host environment prior to program startup. The
intent is to supply to the prog...