大约有 7,900 项符合查询结果（耗时：0.0281秒） [XML]
What's “wrong” with C++ wchar_t and wstrings? What are some alternatives to wide characters?
...e used with ascii strings to work with other languages.
Unfortunately the wording of wchar_t's specification assume a one-to-one mapping between characters and codepoints to achieve this. Unicode breaks that assumption2, so you can't safely use wchar_t for simple text algorithms either.
This means...
What is the difference between compile and link function in angularjs
...ome consistent model structure that your directive can interpret. In other words: you want a macro.
This is a great use for the compile phase, since you can base all of the DOM manipulations on things you know just from the attributes. Simply use jQuery to add the attributes:
compile: function(te...
Why does my application spend 24% of its life doing a null check?
...l addresses. The unit of storage for the L1 cache is 64 bytes. Or in other words, once the processor reads one byte, the next 63 are very fast since they'll be present in the cache.
Which makes an array by far the most efficient data structure. Also the reason that the .NET List<> class isn't...
One DbContext per web request… why?
...ou to let a whole set of objects operate within the same context. In other words, they operate within the same business transaction.
If you have no goal of having a set of operations operate inside the same context, in that case the transient lifestyle is fine, but there are a few things to watch:
...
CORS Access-Control-Allow-Headers wildcard being ignored?
...
A word of warning, you may run into trouble by relying on passing back the Access-Control-Request-Headers value if you also allow the browser to cache the preflight response (with Access-Control-Max-Age). You don't know that th...
Can a local variable's memory be accessed outside its scope?
...back, you have to put the compiler in a special "unsafe" mode, and put the word "unsafe" in your program, to call attention to the fact that you are probably doing something dangerous that could be breaking the rules.
For further reading:
What if C# did allow returning references? Coincidentally...
Is there a difference between “==” and “is”?
...istency, recommends:
Equality comparison should be reflexive. In other words, identical
objects should compare equal:
x is y implies x == y
We can see that this is the default behavior for custom objects:
>>> class Object(object): pass
>>> obj = Object()
>>> ...
Why is it bad practice to call System.gc()?
...econd call will do (live* W1 + 0 * W2) work and reclaim nothing. In other words we have done (live * W1) work and achieved absolutely nothing.
We can model the efficiency of the collector as the amount of work needed to collect a unit of garbage; i.e. efficiency = (live * W1 + garbage * W2) / garb...
Which is faster: while(1) or while(2)?
...ate my answer to address it. What I meant, though, was that the standard's wording "... until the controlling expression compares equal to 0" implies evaluating <expr> == 0; that's what "compares equal to 0" means in C. That comparison is part of the semantics of the while loop. There is no i...
Why is “final” not allowed in Java 8 interface methods?
...hat doesn't break existing code.
Could reintroducing the 'package' keyword as an access-specifier be
viable. It's absence of a specifier in an interface would imply
public-access and the absence of a specifier in a class implies
package-access. Which specifiers make sense in an interface...