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Single vs Double quotes (' vs ")
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I suggest though single over double -- Why use two when one can do the job.
– Ujjwal Singh
Jun 22 '14 at 19:00
3
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Is “for(;;)” faster than “while (TRUE)”? If not, why do people use it?
...es are only worth your time for things that really matter. This just isn't one of those things. As you can see, everyone has a pet way of writing an unending loop. Pick for yourself whatever makes you happiest for the little things, and then run your profiler on the code that matters. :)
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How to atomically delete keys matching a pattern using Redis
...0, you can run lua scripts, which execute atomically. I have never written one, but I think it would look something like this
EVAL "return redis.call('del', unpack(redis.call('keys', ARGV[1])))" 0 prefix:[YOUR_PREFIX e.g delete_me_*]
Warning: As the Redis document says, because of performance ...
What are the differences between a pointer variable and a reference variable in C++?
...nters offering extra levels of indirection. Whereas references only offer one level of indirection.
int x = 0;
int y = 0;
int *p = &x;
int *q = &y;
int **pp = &p;
pp = &q;//*pp = q
**pp = 4;
assert(y == 4);
assert(x == 0);
A pointer can be assigned nullptr directly, whereas refer...
When should I use C++14 automatic return type deduction?
...s a published interface you can (hopefully) rely on.
[*] Occasionally someone tries to make some objective measurements. To the small extent that anyone ever comes up with any statistically significant and generally-applicable results, they are completely ignored by working programmers, in favour o...
How to create a dialog with “yes” and “no” options?
... You can emulate a dialog in HTML (though it won't block like the built-in one). jQuery Dialog is a good example of implementing this kind of thing.
– s4y
Apr 19 '13 at 17:00
3
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When to use , tag files, composite components and/or custom components?
... using JSF 2.0 with Facelets recently and got puzzled by new composite components knowing existing <ui:include> and other templating techniques offered by Facelets 1.x.
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What is an EJB, and what does it do?
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Why really use them? (Why not just stick to POJO?)
IF you need a component that accesses the database, or accesses other connectivity/ directory resources, or is accessed from multiple clients, or is intended as a SOA service, EJBs today are usually "bigger, stronger, faster (or at least more ...
Tab Vs Space preferences in Vim
... ' : 'no')
echohl ModeMsg
echon 'expandtab'
finally
echohl None
endtry
endfunction
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How to programmatically display version/build number of target in iOS app?
...rInfoDictionaryKey: "CFBundleVersion") as! String
If you want both in one:
First use the above lines and then the following one.
Objective-C:
NSString * versionBuildString = [NSString stringWithFormat:@"Version: %@ (%@)", appVersionString, appBuildString];
Swift (tested until 5.0):
let ve...