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How do SQL EXISTS statements work?
...uery do you think will run faster if suppliers has 10M rows and orders has 100M rows and why?
– Teja
Apr 11 '17 at 19:08
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Getting exact error type in from DbValidationException
...ired",ErrorMessageResourceType =typeof(ErrorMessages))]
[MaxLength(100,ErrorMessageResourceName = "maxLength", ErrorMessageResourceType = typeof(ErrorMessages))]
[Display(Name = "FirstName",ResourceType = typeof(Properties))]
public string FirstName { get; set; }
}
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When correctly use Task.Run and when just async-await
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Don't block the UI thread for more than 50ms at a time.
You can schedule ~100 continuations on the UI thread per second; 1000 is too much.
There are two techniques you should use:
1) Use ConfigureAwait(false) when you can.
E.g., await MyAsync().ConfigureAwait(false); instead of await MyAsync();...
那些微信公众大号是如何赚钱的？ - 资讯 - 清泛网 - 专注C/C++及内核技术
...又一热点。
有关数据显示，微信公众号的数量已经突破1000万，每天还在以1.5万的速度增加。尽管公众号创业成本低，但在这1000多万公众号中，能把粉丝量和阅读量做起来的是极少数，而能找到清晰盈利模式的更是凤毛麟角。
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How do you do a case insensitive search using a pattern modifier using less?
...an application, and are likely to want to page back up (if it's generating 100's of lines of logging every second, for instance).
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Timeout on a function call
...de
import multiprocessing
import time
# bar
def bar():
for i in range(100):
print "Tick"
time.sleep(1)
if __name__ == '__main__':
# Start bar as a process
p = multiprocessing.Process(target=bar)
p.start()
# Wait for 10 seconds or until process finishes
p.jo...
Cost of len() function
... and is not timed.
List:
$ python -m timeit -s "l = range(10);" "len(l)"
10000000 loops, best of 3: 0.0677 usec per loop
$ python -m timeit -s "l = range(1000000);" "len(l)"
10000000 loops, best of 3: 0.0688 usec per loop
Tuple:
$ python -m timeit -s "t = (1,)*10;" "len(t)"
10000000 loops, bes...
d3 axis labeling
...le)
.tickFormat(formatAxis)
.ticks(3)
.tickValues([100, 200, 300]) //specify an array here for values
.orient("bottom");
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Should “node_modules” folder be included in the git repository
...blems now.
But:
Pushing the whole node_modules folder (often more than 100 MB) to your repository, will cost you memory space.
A few kb (package.json only) compared with hundreds of MB (package.json & node_modules)... Think about it.
You could do it / should think about it if:
the softwar...
“static const” vs “#define” vs “enum”
..."constants" in a header file. Then this header file was included in around 100 ".c" and ".cpp" files. => 8Mbytes for "consts". Great. Yes I know that you might use a linker to remove unreferenced consts, but then this still leaves you which the "consts" which ARE referenced. Running out of space ...