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MySQL: determine which database is selected?
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What is the HEAD in git?
There seems to be a difference between the last commit, the HEAD and the state of the file I can see in my directory.
5 Ans...
Parameterize an SQL IN clause
...t * from tags where '|' + @tags + '|' like '%|' + Name + '|%'";
using (SqlCommand cmd = new SqlCommand(cmdText)) {
cmd.Parameters.AddWithValue("@tags", string.Join("|", tags);
}
Two caveats:
The performance is terrible. LIKE "%...%" queries are not indexed.
Make sure you don't have any |, bl...
Java inner class and static nested class
...= outerObject.new InnerClass();
see: Java Tutorial - Nested Classes
For completeness note that there is also such a thing as an inner class without an enclosing instance:
class A {
int t() { return 1; }
static A a = new A() { int t() { return 2; } };
}
Here, new A() { ... } is an inner cl...
How to pass variable from jade template file to a script file?
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Is 161803398 A 'Special' Number? Inside of Math.Random()
... @Dukeling The constant is used exactly once, to temper the incoming seed. My very strong suspicion is that it was chosen to be a nothing up my sleeve number that prevents seeds with few bits set (perhaps a common choice) from screwing up the random number generator (instead of some mag...
SQL Server Linked Server Example Query
...ce killers include not giving appropriate rights.
See http://thomaslarock.com/2013/05/top-3-performance-killers-for-linked-server-queries/ for some more info.
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Semaphore vs. Monitors - what's the difference?
... one person can enter at a time. They lock the door to prevent anyone else coming in, do their stuff, and then unlock it when they leave.
A semaphore is like a bike hire place. They have a certain number of bikes. If you try and hire a bike and they have one free then you can take it, otherwise you...
Multiple arguments vs. options object
...this:
initiateTransferProtocol("http", false, 150, 90, null, true, 18);
Completely unreadable unless you do some research. On the other hand, this code reads well:
initiateTransferProtocol({
"protocol": "http",
"sync": false,
"delayBetweenRetries": 150,
"randomVarianceBetweenRetrie...
Why does pthread_cond_wait have spurious wakeups?
...sound strange, but on some multiprocessor systems, making condition wakeup completely predictable might substantially slow all condition variable operations.
In the following comp.programming.threads discussion, he expands on the thinking behind the design:
Patrick Doyle wrote:
> In article ...