大约有 7,549 项符合查询结果（耗时：0.0310秒） [XML]
How to avoid “if” chains?
...arrow anti-pattern. It is called an arrow because the chain of nested ifs form code blocks that expand farther and farther to the right and then back to the left, forming a visual arrow that "points" to the right side of the code editor pane.
Flatten the Arrow with the Guard
Some common ways of...
Why not be dependently typed?
... you: it repeats standard myths as fact. Edwin Brady's language, Idris, performs type erasure (because no run-time behaviour depends on types) and generates a fairly standard lambda-lifted supercombinator encoding from which code is generated using stock G-machine techniques.
–...
Unpacking, extended unpacking and nested extended unpacking
... might find it easier to understand an expression if all the iterables are formatted in the same way.
For the purposes of unpacking only, the following substitutions are valid on the right side of the = (i.e. for rvalues):
'XY' -> ('X', 'Y')
['X', 'Y'] -> ('X', 'Y')
If you find that a valu...
How is “=default” different from “{}” for default constructor and destructor?
...n the default constructor for T is called (and the
initialization is ill-formed if T has no accessible default
constructor);
— if T is a (possibly cv-qualified) non-union class type
without a user-provided constructor, then the object is
zero-initialized and, if T’s implicitly-decl...
Solving “Who owns the Zebra” programmatically?
...lk, pallmall )
h( green, german, zebra, coffee, prince ) % (* formatted by hand *)
h( white, swede, dog, beer, bluemaster)
no more solutions!
% (* 1,706 inferences, 0.000 CPU in 0.070 seconds (0% CPU, Infinite Lips) *)
true.
...
How do I give text or an image a transparent background using CSS?
...
@grm: W3C considered introducing a #RRGGBBAA hex code format, but they decided not to (for various reasons), so we can't.
– outis
Dec 15 '12 at 6:59
95
...
In Functional Programming, what is a functor?
...xample of implementation and practical use, you could define your favorite form of balanced binary search tree once and for all as a functor, and it would take as a parameter a module that provides:
The type of key to be used in the binary tree
A total-ordering function on keys
Once you've done ...
How to make Twitter Bootstrap menu dropdown on hover rather than click
... </ul>
</li>
</ul>
<form action="" class="navbar-search pull-left">
<input type="text" placeholder="Search" class="search-query span2">
</form>
<ul class="nav pull-right">
<li>&l...
If REST applications are supposed to be stateless, how do you manage sessions?
...te isolation. When the client makes an HTTP request, it includes all the information necessary for the server to fulfill that request. The server never relies on information from previous requests. If that information was important, the client would have to send it again in subsequent request. State...
What is the difference between quiet NaN and signaling NaN?
...ented in software. A signalling NaN will produce a signal, usually in the form of exception from the FPU. Whether the exception is thrown depends on the state of the FPU.
C++11 adds a few language controls over the floating-point environment and provides standardized ways to create and test for N...