大约有 44,000 项符合查询结果（耗时：0.0449秒） [XML]
What are the precise rules for when you can omit parenthesis, dots, braces, = (functions), etc.?
...ef x: Any; def y: Any}
Because the type parameter, T, is inferred as the least common supertype of the two - Any.
Function definitions:
= can be dropped if the function returns Unit (nothing).
{} for the function body can be dropped if the function is a single statement, but only if the state...
Greedy vs. Reluctant vs. Possessive Quantifiers
... greedy quantifier tells the engine to start with the entire string (or at least, all of it that hasn't already been matched by previous parts of the regular expression) and check whether it matches the regexp. If so, great; the engine can continue with the rest of the regexp. If not, it tries again...
Why does changing 0.1f to 0 slow down performance by 10x?
...three significant digits, then 0.00001 = 1e-5, and 0.00001 + 0.1 = 0.1, at least for this example float format, because it doesn't have room to store the least significant bit in 0.10001.
In short, y[i]=y[i]+0.1f; y[i]=y[i]-0.1f; isn't the no-op you might think it is.
Mystical said this as well: th...
FixedThreadPool vs CachedThreadPool: the lesser of two evils
...FixedThreadPool are both backed by the same thread pool implementation (at least in the open JDK) just with different parameters. The differences just being their thread minimum, maximum, thread kill time, and queue type.
public static ExecutorService newFixedThreadPool(int nThreads) {
return...
How to concatenate twice with the C preprocessor and expand a macro as in “arg ## _ ## MACRO”?
...rick with two levels of recursion -- I had to play with stringification at least once -- but didn't know how to do this one.
– JJ.
Sep 29 '09 at 3:34
...
Which parts of Real World Haskell are now obsolete or considered bad practice?
...n of the libraries/functions you want to use. Even if you're lazy, know at least the types.
Remarks to chapters
This is just a quick overview of some of the things that I noticed while reading RWH. It's probably incomplete.
Chapter 2. Types and Functions vs the FTP
Since GHC 7.10.
The type of ...
What is the difference between 'classic' and 'integrated' pipeline mode in IIS7?
...
A perfect answer to such question, should at least refer to one of the Microsoft articles, such as iis.net/learn/application-frameworks/….
– Lex Li
May 19 '14 at 12:51
...
MySQL: @variable vs. variable. What's the difference?
...d insidious. They cross sessions! @variables have "session scope", so at least they they stay confined in that manner. In any normal language that is what you call "global" scope however (when they cross functions etc). The MySQL concept of "global" should perhaps be called "universal", in that ...
What does Ruby have that Python doesn't, and vice versa?
...since it's missing some of the useful syntactic sugar. However, there's at least one way to get it in an ad-hoc fashion. See, for example, here.
share
answ...
Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
I first noticed in 2009 that GCC (at least on my projects and on my machines) have the tendency to generate noticeably faster code if I optimize for size ( -Os ) instead of speed ( -O2 or -O3 ), and I have been wondering ever since why.
...