大约有 7,549 项符合查询结果（耗时：0.0199秒） [XML]
Empty set literal?
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Why?! Performance is almost identical: $ python3.7 -m timeit 'set()' 2000000 loops, best of 5: 177 nsec per loop $ python3.7 -m timeit '{*()}' 2000000 loops, best of 5: 171 nsec per loop
– ogurets
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How to know that a string starts/ends with a specific string in jQuery?
...eems to solve the problem @nokturnal mentions: str.match(/^Hello/) But the form /regex/.test(str) is even better for this particular case, per stackoverflow.com/questions/10940137/…
– CrazyPyro
Sep 5 '13 at 3:59
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C++ Returning reference to local variable
...rimitive values because just about every compiler nowadays implements some form of return value optimization:
class big_object
{
public:
big_object(/* constructor arguments */);
~big_object();
big_object(const big_object& rhs);
big_object& operator=(const big_object& r...
Check that an email address is valid on iOS [duplicate]
...rString : laxString;
NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
return [emailTest evaluateWithObject:checkString];
}
Discussion on Lax vs. Strict - http://blog.logichigh.com/2010/09/02/validating-an-e-mail-address/
And because categories are j...
Contains method for a slice
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In its current form this code offers no benefit, since there is no point in constructing a map from a slice if you are only going to use it once. — To be useful, this code should rather provide a function sliceToMap that does all the prep...
Remove Elements from a HashSet while Iterating [duplicate]
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If you need to remove an entry while iteration, you need to use the long form that uses the Iterator directly.
for (Iterator<Integer> it = set.iterator(); it.hasNext();) {
Integer element = it.next();
if (element % 2 == 0) {
it.remove();
}
}
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How do I convert a double into a string in C++?
...any of the conversion routines are implemented inline. According to the performance measurements on the bottom of this page (boost.org/doc/libs/1_47_0/libs/conversion/lexical_cast.htm), boost::lexical_cast is faster than using stringstreams and, in most cases, faster than scanf/printf
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ASP.NET MVC Yes/No Radio Buttons with Strongly Bound Model MVC
... clicks on Label to toggle radio button
Least possible code to maintain in form (1 line). If something is wrong with the way it is rending, take it up with the template.
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Why do we use volatile keyword? [duplicate]
... alien outside this planet called
program. Maybe some lightning, some
form of interrupt, volcanoes, etc can
mutate me. Maybe. You never know who
is going to change me! So O you
ignorant, stop playing an all-knowing
god, and don't dare touch the code
where I'm present. Okay?"
Well, t...
Is it possible to embed animated GIFs in PDFs?
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Open the GIF in Quicktime and save as MOV (Apparently it works with other formats too, you'll have to try it out).
Insert the MOV into the PDF (with Adobe InDesign (make sure to set Object> Interactive> film options > Embed in PDF) - It should work with Adobe Acrobat Pro DC too: see link
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