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Differences between INDEX, PRIMARY, UNIQUE, FULLTEXT in MySQL?
...ex will be ineffective. In practice each architecture will differ but, the idea is still correct.
Secondary Indexes (and that is very specific to mysql) should not be seen as completely separate and different objects from the primary key. In fact, both should be used jointly and, once this informat...
Why is $$ returning the same id as the parent process?
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Ok I honestly have no idea what that means, but echo $BASHPID works in bash 4 and 5 (but not version 3.2.57 on MacOS)
– Alexander Mills
May 31 '19 at 20:56
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JSON Naming Convention (snake_case, camelCase or PascalCase) [closed]
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I disagree with these ideas, simply because Python backend > Java frontend should be camelCase, but then you add Python frontend and you have compromised backend and one frontend. It should be how backend has it by "standard". Frontend parsers ...
When should std::move be used on a function return value? [duplicate]
... std::array that are expensive to move, or for templates where you have no idea whether moves are cheap or not, you're more likely to be bothered worrying about it.
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Is it good practice to NULL a pointer after deleting it?
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I wouldn't say deprecated, it makes it sound like the idea is just gone. Rather, it's being replaced with unique_ptr, which does what auto_ptr tried to do, with move semantics.
– GManNickG
Dec 19 '09 at 0:58
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How to check if a string in Python is in ASCII?
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Vincent Marchetti has the right idea, but str.decode has been deprecated in Python 3. In Python 3 you can make the same test with str.encode:
try:
mystring.encode('ascii')
except UnicodeEncodeError:
pass # string is not ascii
else:
pass # st...
Centering a div block without the width
...50%;
position: relative;
}
.clear {
clear: both;
}
JSFiddle
The idea here is that you contain the content you want to center in two divs, an outer one and an inner one. You float both divs so that their widths automatically shrink to fit your content. Next, you relatively position the o...
How can I run PowerShell with the .NET 4 runtime?
...s been externally altered so that the opened file is no longer valid." Any ideas?
– JoshL
Oct 5 '11 at 18:36
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Why does direction of index matter in MongoDB?
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@Sammaye I think that's the right idea, although I'm not sure that it's the entire sort. I'd have to look at the implementation to know how it really works, but I would think that the results could be pulled back sorted by a alone, and then the additional b s...
How to add a new method to a php object on the fly?
...cted members of the class from these functions.
Good question and clever idea using the new anonymous functions!
Interestingly, this works: Replace
$me->doSomething(); // Doesn't work
by call_user_func on the function itself:
call_user_func($me->doSomething); // Works!
what does...