大约有 15,600 项符合查询结果（耗时：0.0278秒） [XML]
Difference between private, public, and protected inheritance
...t.
If we compile the following code, we will get nothing but compilation errors saying that put and get methods are inaccessible. Why?
When we omit the visibility specifier, the compiler assumes that we are going to apply the so-called private inheritance. It means that all public superclass comp...
How do the likely/unlikely macros in the Linux kernel work and what is their benefit?
...
These macros mostly were used for error checking. Because error leaves less probably then normal operation. A few people make profiling or calculation to decide most used leaf...
– gavenkoa
May 4 '12 at 21:12
...
Should operator
...("w1");
Widget w2("w2");
// These two won't work
{
// Error: operand types are std::ostream << std::ostream
// cout << w1.operator<<(cout) << '\n';
// Error: operand types are std::ostream << Widget
// cout << w1 <&...
When should I write the keyword 'inline' for a function/method?
...ugh. As a rule, guessing what would would be improved by inlining is very error prone. The exception to that rule being one liners.
– deft_code
Aug 15 '11 at 18:50
5
...
What are the differences between type() and isinstance()?
...g)
return treatasscalar(x)
try:
return treatasiter(iter(x))
except TypeError:
return treatasscalar(x)
You could say that basestring is an Abstract Base Class ("ABC")—it offers no concrete functionality to subclasses, but rather exists as a "marker", mainly for use with isinstance. The conc...
How to Update Multiple Array Elements in mongodb
...
this code returns ERROR in pymongo. tehre is error: raise TypeError("%s must be True or False" % (option,)) TypeError: upsert must be True or False
– Vagif
Jun 8 at 12:05
...
Header files for x86 SIMD intrinsics
...s), rather than having its own header.
Some compilers will still generate error messages if you use intrinsics for instruction-sets you haven't enabled (e.g. _mm_fmadd_ps without enabling fma, even if you include immintrin.h and enable AVX2).
...
Typescript: difference between String and string
...
console.log(typeof a); // string
console.log(typeof b); // object
Your error:
Type 'String' is not assignable to type 'string'. 'string' is a
primitive, but 'String' is a wrapper object.
Prefer using 'string' when possible.
Is thrown by the TS compiler because you tried to assig...
How do I check if a type is a subtype OR the type of an object?
...rin Forms PCL project, the above solutions using IsAssignableFrom gives an error:
Error: 'Type' does not contain a definition for 'IsAssignableFrom' and
no extension method 'IsAssignableFrom' accepting a first argument of
type 'Type' could be found (are you missing a using directive or an
...
How to delete an old/unused Data Model Version in Xcode
...all the extraneous "development-only" models using this approach I get the error: "Error: Can't find or automatically infer mapping model for migration".
– Dalmazio
Sep 12 '14 at 21:04
...