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MySQL: Transactions vs Locking Tables
...orks like this:
$balance = "GET BALANCE FROM your ACCOUNT";
if ($balance < $amount_being_paid) {
charge_huge_overdraft_fees();
}
$balance = $balance - $amount_being paid;
UPDATE your ACCOUNT SET BALANCE = $balance;
$balance = "GET BALANCE FROM receiver ACCOUNT"
charge_insane_transaction_fee...
Log all queries in mysql
...
Enable the log for table
mysql> SET GLOBAL general_log = 'ON';
mysql> SET global log_output = 'table';
View log by select query
select * from mysql.general_log
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...
.NET Global exception handler in console application
...ht an exception");
}
}
static void DemoThread()
{
for(int i = 5; i >= 0; i--)
{
Console.Write("24/{0} =", i);
Console.Out.Flush();
Console.WriteLine("{0}", 24 / i);
System.Threading.Thread.Sleep(1000);
if (exiting) return;
}
}
You can receive notificat...
How to open an elevated cmd using command line for Windows?
...inistrative privileges option in the Create new task dialog (Task Manager > File > Run new task), but there is no built-in way to effectively elevate privileges using the command line.
However, there are some third party tools (internally relying on Windows APIs) you can use to elevate privil...
What's the difference between dependencies, devDependencies and peerDependencies in npm package.json
...es:
before 3.0: are always installed if missing, and raise an error if multiple incompatible versions of the dependency would be used by different dependencies.
expected to start on 3.0 (untested): give a warning if missing on npm install, and you have to solve the dependency yourself manually. Wh...
What is the most efficient/elegant way to parse a flat table into a tree?
...is about immediate children (or immediate parent). You can add a "path_length" column to the ClosureTable to make it easier to query specifically for an immediate child or parent (or any other distance).
INSERT INTO ClosureTable (ancestor_id, descendant_id, path_length) VALUES
(1,1,0), (1,2,1), ...
Why is “except: pass” a bad programming practice?
...
>>> import this
The Zen of Python, by Tim Peters
Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicated.
Flat is better tha...
Where do I find old versions of Android NDK? [closed]
..... e.g.: dl.google.com/android/ndk/android-ndk-r8b-darwin-x86_64.tar.bz2 -> 404 but dl.google.com/android/ndk/android-ndk-r8b-darwin-x86.tar.bz2 -> works fine. A pity Google does not have a proper page with older releases.
– stoiczek
Apr 8 '13 at 9:03
...
How to override toString() properly in Java?
... can do so if you simply right-click on the source code and select Source > Generate toString
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Is there a difference between foreach and map?
...on (this is particularly true in Scala) is that a call to map does not result in the execution of its underlying logic until when the expected transformed list is summoned. In contrast, foreach's operation is computed immediately.
– solimant
Apr 7 '16 at 21:41
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