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Why is it faster to check if dictionary contains the key, rather than catch the exception in case it
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On the one hand, throwing exceptions is inherently expensive, because the stack has to be unwound etc.
On the other hand, accessing a value in a dictionary by its key is cheap, because it's a fast, O(1) operation.
BTW: The correct ...
How can I trim leading and trailing white space?
...terstrip.white=TRUE.
If you want to clean strings afterwards you could use one of these functions:
# Returns string without leading white space
trim.leading <- function (x) sub("^\\s+", "", x)
# Returns string without trailing white space
trim.trailing <- function (x) sub("\\s+$", "", x)
# ...
How to enable file sharing for my app?
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Is there any reason why it couldn't have effect in one application? I enabled it but the the App won't show up on iTunes File Sharing
– rraallvv
Feb 5 '13 at 7:40
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Remove padding or margins from Google Charts
...arrived here like most people with this same issue, and left shocked that none of the answer even remotely worked.
For anyone interested, here is the actual solution:
... //rest of options
width: '100%',
height: '350',
chartArea:{
left:5,
top: 20,
width: '100%',
height: '350',
}
.....
Efficient string concatenation in C++
...s really clever and optimizes out the return value copy. So we end up with one new string that contains the concatenation of a and " : ". Now, this happens:
(tmp1 + c)
calls string operator+(string const&, string const&)(tmp1, c)
=> tmp2 == <end result>
Compare that to the foll...
How do I REALLY reset the Visual Studio window layout?
...are backing up your settings often doesn't work. I've never successfully done it. I believe there is a known bug if you add macros to some menus.
– dwidel
May 27 '11 at 23:19
1
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How to grep a text file which contains some binary data?
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this is the same as grep --text which paxdiablo has mentioned 2 years earlier
– user829755
Jan 16 '17 at 13:59
4
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Using MySQL with Entity Framework [closed]
...anything relevant about Entity Framework/MySQL on Google so I'm hoping someone knows about it.
10 Answers
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Convert sqlalchemy row object to python dict
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Best answer in this thread, don't know why everyone else is proposing much more complicated solutions.
– Dave Rawks
Jun 15 '12 at 15:45
95
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@AspectJ pointcut for all methods of a class with specific annotation
...or() {}
Advice the last pointcut that combines the first two and you're done!
If you're interested, I have written a cheat sheet with @AspectJ style here with a corresponding example document here.
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