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Why should I prefer single 'await Task.WhenAll' over multiple awaits?
...will be lost. I.e. if t2 and t3 throws exception, only t2 will be catched; etc. The subsequent tasks exceptions will go unobserved.
Where as in the WhenAll - if any or all of the tasks fault, the resulting task will contain all of the exceptions. The await keyword still always re-throws the first ...
Does Java casting introduce overhead? Why?
...(table of method pointers, plus table of class hierarchy, interface cache, etc) don't change. So the [class] cast checks the type, and if it fits nothing else has to happen.
– Tom Hawtin - tackline
Jan 12 '12 at 20:31
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Using getopts to process long and short command line options
...her the -m 4096 or -m4096 style, mix options and non-options in any order, etc. getopt also outputs an error message if unrecognized or ambiguous options are found.
NOTE: There are actually two totally different versions of getopt, basic getopt and GNU getopt, with different features and different...
Erlang's 99.9999999% (nine nines) reliability
...oesn't matter how many times you swap code modules, restart failed modules etc. as long as the ATM switch process itself doesn't stop. Like youtube - the download can pause for seconds - but as long as you have sufficient buffer the video still plays :)
– NPSF3000
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Why am I getting a “401 Unauthorized” error in Maven?
...get a 401 Unauthorized error if you supply the wrong credentials (password etc). You also get an error (and off the top of my head is also a 401) if you try to publish something to a releases repository and that version already exists in the repository. So you might find that by publishing from th...
What are queues in jQuery?
...ts[0].geometry.location;
map.setZoom(13);
map.setCenter(location);
new google.maps.Marker({ map: map, position: location });
}
// geocoder result returned, continue with animations:
next();
}
});
// after we find s...
What really is a deque in STL?
...push_Front happens you just push at the end i.e. at position 999, then 998 etc. until the two ends meet. Then you reallocate (with exponential growth to guarantee amortizet constant times) just like you would do with a ordinary vector. So effectively you just need one additional pointer to first el....
What is the proper REST response code for a valid request but an empty data?
... 404:
200 should be returned with the body of whatever you successfully fetched. Not appropriate when the entity you're fetching doesn't exist.
202 is used when the server has begun work on an object but the object isn't fully ready yet. Certainly not the case here. You haven't begun, nor will ...
Python Infinity - Any caveats?
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A simple float addition, multiplication, etc will happily produce inf though: f=1.3407807929942597e+154; f*f => inf. It seems rather an exception of ** to raise an OverflowError.
– eregon
Jan 6 '15 at 21:32
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Making 'git log' ignore changes for certain paths
..., all changes to those files will be ignored by git status, git commit -a, etc. When you're ready to commit those files, just reverse it:
git update-index --no-skip-worktree path/to/file
and commit as normal.
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