大约有 41,300 项符合查询结果（耗时：0.0276秒） [XML]
Regex: match everything but specific pattern
... @robots.txt Please remove these comments. You are asking an XY question. Character classes are meant to match single chars, there is no way to define a sequence of chars with them. You should probably just find the substring between the start of a string and the first occurrence of co...
Fastest way to check if a file exist using standard C++/C++11/C?
... requirements by making an assumption about the solution ... a case of the XY problem. You also say "in standard c++11(or)c++(or)c" ... which are all different, and this also is inconsistent with your requirement for speed ... the fastest solution would involve tailoring the code to the target syste...
How do I make the method return type generic?
...stion as just trying to learn what is possible in Java generics, not as an xyproblem (meta.stackexchange.com/questions/66377/what-is-the-xy-problem) that needs to be re-engineered. Like any pattern or approach, there are times when the code I provided is appropriate and times when something totally ...
How can I add a hint text to WPF textbox?
...set the TextBlock to IsHitTestVisible="False"
– Mage Xy
Feb 6 '17 at 18:18
1
@MageXy is referring...
How can I center an absolutely positioned element in a div?
...parent and child can be totally flexible (and/or unknown)):
.centered-axis-xy {
position: absolute;
left: 50%;
top: 50%;
transform: translate(-50%,-50%);
}
Keep in mind that you might need transform vendor prefixed as well. For example -webkit-transform: translate(-50%,-50%);
...
Defining a variable with or without export
... bash -c 'echo $var'; echo $var gives asdf\nasdf.
– 4xy
Jul 13 '19 at 13:47
add a comment
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Can an html element have multiple ids?
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@kevin This answer assumes OP is facing XY problem and can definitely help someone that is trying to achieve the class behaviour via IDs -- for whatever reason.
– Mahdi
Aug 8 '15 at 9:28
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How to see top processes sorted by actual memory usage?
... and modifying the free list, the other doesn't. Unfortunately, this is an XY question. The problem has to do with performance and may be entirely unrelated to memory consumption (despite the evidence that making more memory free helps it, that may be for more complex reasons than the OP suspects) b...
How to invert a grep expression
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The find command is the most semantic solution to this XY problem. Combining ls and grep for this purpose seems hacky at best. This should be the accepted answer. (+1)
– Eric Seastrand
May 3 '16 at 15:17
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Regular vs Context Free Grammars
...sically any combination of terminals and non-terminals." However, tu^nvw^mxy^kz is a combination of terminals and nonterminals, but not context-free.
– Charlie Martin
Jun 3 '18 at 19:14
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