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Performance of FOR vs FOREACH in PHP
...ur time for a micro-optimization. Remember, Premature Optimization Is The Root Of All Evil...
Edit: Based upon the comment, I decided to do a quick benchmark run...
$a = array();
for ($i = 0; $i < 10000; $i++) {
$a[] = $i;
}
$start = microtime(true);
foreach ($a as $k => $v) {
$a[$...
How exactly does a generator comprehension work?
...iterables, something like a cursor which moves on a resource. If you know mysql cursor or mongodb cursor, you may be aware of that the whole actual data never gets loaded into the memory at once, but one at a time. Your cursor moves back and forth, but there is always a one row/list element in memo...
Detect encoding and make everything UTF-8
... @Christian: Indeed, that's what the authors of High Performance MySQL recommend too.
– Alix Axel
Dec 19 '11 at 7:39
1
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What's the equivalent of use-commit-times for git?
...elist.add(os.path.relpath(path))
elif os.path.isdir(path):
for root, subdirs, files in os.walk(path):
if '.git' in subdirs:
subdirs.remove('.git')
for file in files:
filelist.add(os.path.relpath(os.path.join(root, file)))
mtime = 0...
Difference between a theta join, equijoin and natural join
...ystems created by various vendors such as Microsoft's SQL Server, Oracle's MySQL etc. ) don't even bother supporting this, it is just bad practice (or purposely chose not to implement it). Imagine that a developer comes and changes the name of the second column in Product from Price to Cost. Then al...
How do I create a custom iOS view class and instantiate multiple copies of it (in IB)?
...property to self. We extract the first object in the array and that is the root view of the Nib. We add the view as a subview and Voila it's on screen.
Obviously this just changes the label's background color when the buttons are pushed, but this example should get you well on your way.
Notes base...
What is the difference between a reference type and value type in c#?
...d on the managed heap and are therefore subject to GC. If a Ref Type has a root reference it cant be collected and is promoted up the generations, 0, 1 & 2. If it doesn't have a root reference it can be Garbage Collected & it then goes through this process called Resurrection where it is kil...
How can I get the current date and time in UTC or GMT in Java?
... Behrang, according to stackoverflow.com/questions/4123534/…, the MySQL JDBC driver converts a given java.util.Timestamp (or java.util.Date) to the server time zone.
– Derek Mahar
Dec 7 '10 at 21:02
...
How to make join queries using Sequelize on Node.js
...
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How the single threaded non blocking IO model works in Node.js
...s that you would use will have callbacks.
Edit
The SQL query is taken from mysql library. It implements callback style as well as event emitter to queue SQL requests. It does not execute them asynchronously, that is done by the internal libuv threads that provide the abstraction of non-blocking I/O....