大约有 47,000 项符合查询结果（耗时：0.0740秒） [XML]
how perform grep operation on all files in a directory
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@umi If I run grep -r x . results come from all files of all extensions. If I run grep -r x *.scss than I receive no results.
– Chris
Oct 2 '17 at 21:15
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Java - No enclosing instance of type Foo is accessible
...e Hello class.
In your code, you're trying to create an instance of Thing from a static context. That is what the compiler is complaining about.
There are a few possible solutions. Which solution to use depends on what you want to achieve.
Move Thing out of the Hello class.
Change Thing to be a ...
In C#, why is String a reference type that behaves like a value type?
... to this situation where we have a type with value sematics not inheriting from System.ValueType. Thanks Ben.)
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Checking if an object is null in C#
...f course you want to use them ...)
For not null use if (obj is object) and from C# 9 you can also use if (obj is not null)
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C/C++ maximum stack size of program
... looking for) {
break;
}
dfs.pop();
for (outgoing nodes from top) {
dfs.push(outgoing node);
}
} while (!dfs.empty())
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Convert base-2 binary number string to int
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Another way to do this is by using the bitstring module:
>>> from bitstring import BitArray
>>> b = BitArray(bin='11111111')
>>> b.uint
255
Note that the unsigned integer is different from the signed integer:
>>> b.int
-1
The bitstring module isn't a req...
Difference between VARCHAR and TEXT in MySQL [duplicate]
...CHAR does not provide any noticeable performance improvement. (This comes from an old wives tale about MyISAM tables; even there it was of dubious validity.)
– Rick James
Jan 27 '19 at 23:39
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Django - how to create a file and save it to a model's FileField?
...solution, but here is the way I went about generating a CSV and serving it from a view.
Thought it was worth while putting this here as it took me a little bit of fiddling to get all the desirable behaviour (overwrite existing file, storing to the right spot, not creating duplicate files etc).
Dja...
SyntaxError: Use of const in strict mode
...st stable NodeJS version
sudo n stable
Update nodejs instructions taken from, https://stackoverflow.com/a/19584407/698072
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How do I get PyLint to recognize numpy members?
...ng sectors:
[MASTER]
# A comma-separated list of package or module names from where C extensions may
# be loaded. Extensions are loading into the active Python interpreter and may
# run arbitrary code
extension-pkg-whitelist=numpy
and
[TYPECHECK]
# List of module names for which member attribu...