大约有 13,700 项符合查询结果（耗时：0.0448秒） [XML]
How to optimize for-comprehensions and loops in Scala?
...ormance in simple cases:
http://groups.google.com/group/scala-user/browse_thread/thread/86adb44d72ef4498
http://groups.google.com/group/scala-language/browse_thread/thread/94740a10205dddd2
Here is the issue in the bug tracker:
https://issues.scala-lang.org/browse/SI-4633
Update 5/28:
As a sho...
Why does C++11 not support designated initializer lists as C99? [closed]
...kery, so just sharing for fun.
#define with(T, ...)\
([&]{ T ${}; __VA_ARGS__; return $; }())
And use it like:
MyFunction(with(Params,
$.Name = "Foo Bar",
$.Age = 18
));
which expands to:
MyFunction(([&] {
Params ${};
$.Name = "Foo Bar", $.Age = 18;
return $;
}()));
...
Why is TypedReference behind the scenes? It's so fast and safe… almost magical!
...
Short answer: portability.
While __arglist, __makeref, and __refvalue are language extensions and are undocumented in the C# Language Specification, the constructs used to implement them under the hood (vararg calling convention, TypedReference type, arglist...
iOS 7 parallax effect in my view controller
...omIOS7MotionEffectExtent = 10.0;
- (void)applyMotionEffects:(UIView *YOUR_VIEW) {
if (NSClassFromString(@"UIInterpolatingMotionEffect")) {
UIInterpolatingMotionEffect *horizontalEffect = [[UIInterpolatingMotionEffect alloc] initWithKeyPath:@"center.x"
...
Python list of dictionaries search
... 3.6.4, W7x64.
from random import randint
from timeit import timeit
list_dicts = []
for _ in range(1000): # number of dicts in the list
dict_tmp = {}
for i in range(10): # number of keys for each dict
dict_tmp[f"key{i}"] = randint(0,50)
list_dicts.append( dict_tmp )
d...
How to check if a user likes my Facebook Page or URL using Facebook's API
...ou turn on the OAuth 2.0 for Canvas advanced option, Facebook will send a $_REQUEST['signed_request'] along with every page requested within your tab app. If you parse that signed_request you can get some info about the user including if they've liked the page or not.
function parsePageSignedReques...
Resolve Type from Class Name in a Different Assembly
...pe>
{
private static Dictionary<string, Type> _types;
private static object _lock = new object();
public static Type FromString(string typeName)
{
if (_types == null) CacheTypes();
if (_types.ContainsK...
Perl flags -pe, -pi, -p, -w, -d, -i, -t?
...ns (for most things):
$ perl -MO=Deparse -p -e 1
LINE: while (defined($_ = <ARGV>)) {
'???';
}
continue {
die "-p destination: $!\n" unless print $_;
}
-e syntax OK
1 is represented by '???', because it is optimized away.
$ perl -MO=Deparse -p -i -e 1
BEGIN { $^I = ""; }
LINE...
How to make rounded percentages add up to 100%
...sion using underscorejs:
function foo(l, target) {
var off = target - _.reduce(l, function(acc, x) { return acc + Math.round(x) }, 0);
return _.chain(l).
sortBy(function(x) { return Math.round(x) - x }).
map(function(x, i) { return Math.round(x) + (off > i) - (i &...
How to install MySQLdb (Python data access library to MySQL) on Mac OS X?
...e egg under Users/$USER/.python-eggs
Step 4:
Originally required editing _mysql.c, but is now NO LONGER NECESSARY. MySQLdb community seem to have fixed this bug now.
Step 5:
Create a symbolic link under lib to point to a sub-directory called mysql. This is where it looks for during compilation.
...