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MySQL Results as comma separated list
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Now only I came across this situation and found some more interesting features around GROUP_CONCAT. I hope these details will make you feel interesting.
simple GROUP_CONCAT
SELECT GROUP_CONCAT(TaskName)
FROM Tasks;
Resul...
Using an ORM or plain SQL? [closed]
...a lot of work in getting data in and out of the database. (You'll want to know how it handles polymorphism and many-to-many relationships if you need to map those. It's these two domains that provide most of the 'impedance mismatch' that makes some call ORM the 'vietnam of computer science'.)
For a...
Why does changing 0.1f to 0 slow down performance by 10x?
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@s73v3r That's a very good question. Now that I look at the assembly, not even + 0.0f gets optimized out. If I had to guess, it could be that + 0.0f would have side-effects if y[i] happened to be a signalling NaN or something... I could be wrong though.
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Multiline strings in JSON
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Now it ECMA-404 )) ecma-international.org/publications/files/ECMA-ST/ECMA-404.pdf
– gavenkoa
Mar 20 '17 at 9:06
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What is the global interpreter lock (GIL) in CPython?
... come across the GIL unless you're writing a C extension" - You might not know that the cause of your multi-threaded code running at a snails pace is the GIL, but you'll certainly feel its effects. It still amazes me that to take advantage of a 32-core server with Python means I need 32 processes wi...
vim, switching between files rapidly using vanilla Vim (no plugins)
... "any subdirectory" in combination with :e but I'll be using it a lot from now on. I marvel at the work that got into Ctrl-P and can learn a lot from it but it didn't work for me. I found it to be a bit slugish and as such interrupting my train of thought while working (could be my system, my settin...
How to use MDC with thread pools?
... consistently;
Avoids tacit bugs where the MDC is incorrect but you don't know it; and
Minimizes changes to how you use thread pools (e.g. subclassing Callable with MyCallable everywhere, or similar ugliness).
Here's a solution that I use that meets these three needs. Code should be self-explanato...
How do browsers pause/change Javascript when tab or window is not active?
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Great answer. Any other possible known differences for functions other than setInterval and requestAnimationFrame?
– Andrew Mao
Apr 16 '13 at 20:11
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How to override a JavaScript function
...nction by just re-declaring it.
parseFloat = function(a){
alert(a)
};
Now parseFloat(3) will alert 3.
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Static variables in member functions
...only to those types. e.g. template<typename T> void foo (T t) {...}. Now for foo<int> there will be a static int i (say foo<int>::i) and separate for foo<string> there will be a separate static int i (say foo<string>::i) and so on. i will be incremented separately for f...