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Dictionary vs Object - which is more efficient and why?
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Did you test this? o.__dict__["attr"] is the one with extra overhead, taking an extra bytecode op; obj.attr is faster. (Of course attribute access isn't going to be slower than subscription access--it's a critical, heavily optimized code path.)
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How to fix getImageData() error The canvas has been tainted by cross-origin data?
...first then set source and then access data onload
– jones
Aug 22 '18 at 12:04
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What if it's a lo...
Why is Hibernate Open Session in View considered a bad practice?
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One difference is that it delays the closing of the Hibernate session. You will wait for the JSP to be rendered/written/etc, and that keeps the objects in memory longer. That may be a problem especially if you need to write d...
When should I use the Visitor Design Pattern? [closed]
... In your "main" example at the end : theSound.hereIsACat(c) would have done the job, how do you justify for all the overhead introduced by the pattern ? double dispatching is the justification.
– franssu
Sep 18 '14 at 10:46
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Is there a good tutorial on MSBuild scripts? [closed]
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just found one on the google cache 74.125.155.132/search?q=cache:http://brennan.offwhite.net/blog/…
– Preet Sangha
Feb 16 '10 at 23:23
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How to revert a merge commit that's already pushed to remote branch?
git revert <commit_hash> alone won't work. -m must be specified, and I'm pretty confused about it.
16 Answers
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Different floating point result with optimization enabled - compiler bug?
... sums on paper then you should avoid floating point. -ffloat-store removes one source of unpredictability but it's not a magic bullet.
– plugwash
Nov 25 '15 at 18:38
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In C#, what happens when you call an extension method on a null object?
... referring to the difference between call and callvirt il instructions. In one edit I actually tried to href the two Opcodes pages, but the editor barfed at the links...
– Marc Gravell♦
May 11 '09 at 9:48
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How do pointer to pointers work in C?
...bove), and you guessed it: it is itself stored at address 60.
As to why one uses pointers to pointers:
The name of an array usually yields the address of its first element. So if the array contains elements of type t, a reference to the array has type t *. Now consider an array of arrays of typ...
Where does npm install packages?
Can someone tell me where can I find the Node.js modules, which I installed using npm ?
22 Answers
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