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Difference between JVM and HotSpot?
... of the Java Platform, Standard Edition (Java SE).The openjdk is a project started by Sun Microsystems, nowadays care by many companies and the community for build a Java Development Kit absolutely in open source. As per the official documentation.
OpenJDK is an open-source implementation of the Ja...
How to remove non-alphanumeric characters?
... ]/i', '', $str);
The i stands for case insensitive.
^ means, does not start with.
\d matches any digit.
a-z matches all characters between a and z. Because of the i parameter you don't have to specify a-z and A-Z.
After \d there is a space, so spaces are allowed in this regex.
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Get Substring - everything before certain char
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Things have moved on a bit since this thread started.
Now, you could use
string.Concat(s.TakeWhile((c) => c != '-'));
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Delete all rows in an HTML table
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Points to note, on the Watch out for common mistakes:
If your start index is 0 (or some index from begin), then, the correct code is:
var tableHeaderRowCount = 1;
var table = document.getElementById('WRITE_YOUR_HTML_TABLE_NAME_HERE');
var rowCount = table.rows.length;
for (var i = tabl...
How to print to console in pytest?
...t:
>>> py.test tmp.py
============================= test session starts ==============================
platform darwin -- Python 2.7.6 -- py-1.4.20 -- pytest-2.5.2
plugins: cache, cov, pep8, xdist
collected 2 items
tmp.py .F
=================================== FAILURES ==================...
Mythical man month 10 lines per developer day - how close on large projects? [closed]
...at the "10 lines per developer per day" from the "Mythical Man Month", and starting a project, I can usually get a couple hundred lines in in a day.
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How does BLAS get such extreme performance?
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A good starting point is the great book The Science of Programming Matrix Computations by Robert A. van de Geijn and Enrique S. Quintana-Ortí. They provide a free download version.
BLAS is divided into three levels:
Level 1 defin...
What does SynchronizationContext do?
...gh degree, take care of capturing the UI thread's synchronization context, starting an asynchronous operation, then getting back onto the UI thread so you can process the operation's result.
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Visual Studio 2010 isn't building before a run when there are code changes
I've been using using F5 (Start Debugging) for years to build the code (if its out of date), and then debug. This was working on VS 2010 also, however today it just start debugging without a build. Say I do a clean on the project, and then hit F5 instead of building it so it can run it throws an err...
SQL Server SELECT LAST N Rows
...0'000 records is nothing where you should mind about performance. When you start talking about millions of records than you can start thinking about performance
– Dom84
Apr 6 '17 at 8:59
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