大约有 5,883 项符合查询结果（耗时：0.0246秒） [XML]
lexers vs parsers
...se is to use "context-free" grammars
and add hacks to the parsers ("symbol tables", etc.) to handle the context-sensitive part.
Neither lexing nor parsing technology is likely to go away soon.
They may be unified by deciding to use "parsing" technology to recognize "words", as is currently explore...
Best architectural approaches for building iOS networking applications (REST clients)
...x with its own gotchas. People implement complex logic to get valid, predictable caching like e.g. monoidal caching with projections based on profunctors. You can read about this beautiful library called Carlos to understand more. And don't forget that Core Data can really help you with all caching ...
How to become an OpenCart guru? [closed]
...n using
$result = $this->db->query("SELECT * FROM `" . DB_PREFIX . "table`");
DB_PREFIX as the name suggests is a constant containing the database prefix if one exists
$result will return an object for SELECT queries, containing a few properties
$result->row contains the first row's da...
Logical operators for boolean indexing in Pandas
...[4])
>>> a3[np.bitwise_and(a1, a2)]
array([1, 1, 1, 2])
Summary table
Logical operator | NumPy logical function | NumPy bitwise function | Bitwise operator
-------------------------------------------------------------------------------------
and | np.logical_and | np...
For-each over an array in JavaScript
...bject may not be honest. It's in §8.6.2, several paragraphs below the big table near the beginning of that section), where it says:
Host objects may implement these internal methods in any manner unless specified otherwise; for example, one possibility is that [[Get]] and [[Put]] for a particul...
A monad is just a monoid in the category of endofunctors, what's the problem?
...noid in monoidal category" comes later in the book as you can see from the table of contents. And yet understanding this notion is absolutely critical to understanding the connection with monads.
(Strict) monoidal categories
Going to Chapter VII on Monoids (which comes later than Chapter VI on Mon...
Move assignment operator and `if (this != &rhs)`
...nd is a test-and-branch. Both work. Both meet all of the requirements of Table 22 MoveAssignable requirements in the C++11 standard. The third also works modulo the non-memory-resource-concern.
All three implementations can have different costs depending on the hardware: How expensive is a bran...
C++ performance vs. Java/C#
...) in C# without tremendous work, while it's a built-in feature of C++. Immutable data is an interesting solution, but not everything can be made immutable, so it's not even enough, by far).
So, C# remains an pleasant language as long as you want something that works, but a frustrating language the...
Polymorphism in C++
...types.
"to" parametric types from values of constant type
They do not establish polymorphic contexts by themselves, but do help empower/simplify code inside such contexts.
You may feel cheated... it doesn't seem like much. The significance is that in parametric polymorphic contexts (i.e. inside...
Unicode equivalents for \w and \b in Java regular expressions?
... talk about whitespace properly is super-annoying. Consider the following table. For each of those code points, there is both a J-results column
for Java and a P-results column for Perl or any other PCRE-based regex engine:
Regex 001A 0085 00A0 2029
J...