大约有 30,000 项符合查询结果（耗时：0.0453秒） [XML]
Memoization in Haskell?
...alling, for example: fix f 123 = 144
We could memoize this by defining:
f_list :: [Int]
f_list = map (f faster_f) [0..]
faster_f :: Int -> Int
faster_f n = f_list !! n
That performs passably well, and replaces what was going to take O(n^3) time with something that memoizes the intermediate r...
find vs find_by vs where
...d are usually replaced with things like this:
Model.all
Model.first
find_by is used as a helper when you're searching for information within a column, and it maps to such with naming conventions. For instance, if you have a column named name in your database, you'd use the following syntax:
Mod...
How to create own dynamic type or dynamic object in C#?
There, is for example, ViewBag property of ControllerBase class and we can dynamically get/set values and add any number of additional fields or properties to this object, which is cool .I want to use something like that, beyond MVC application and Controller class in other types of applicatio...
What Makes a Good Unit Test? [closed]
... of Writing Tests:
1. Use long, descriptive test method names.
- Map_DefaultConstructorShouldCreateEmptyGisMap()
- ShouldAlwaysDelegateXMLCorrectlyToTheCustomHandlers()
- Dog_Object_Should_Eat_Homework_Object_When_Hungry()
2. Write your tests in an Arrange/Act/Assert style.
While th...
Play audio file from the assets directory
...create:
protected override void OnCreate( Bundle savedInstanceState )
{
base.OnCreate( savedInstanceState );
SetContentView( Resource.Layout.lmain_activity );
...
eSound_Def.InitSounds( Assets );
...
}
how to use in code (on button click):
private void bButton_Click( object sender, Ev...
How to list all tags along with the full message in git?
...ould be helpful here. Am I missing something?
– still_dreaming_1
Sep 23 '14 at 15:03
2
...
iOS start Background Thread
...ou'd probably be better off using Grand Central Dispatch, though:
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
[self getResultSetFromDB:docids];
});
GCD is a newer technology, and is more efficient in terms of memory overhead and lines of code.
Updated w...
How can I change a file's encoding with vim?
...
all our base encoding are now belong to UTF-8
– roblogic
Aug 25 '15 at 1:49
add a comment
...
Explicitly set Id with Doctrine when using “AUTO” strategy
...fine with MySQL, I failed to make it work with PostgreSQL as It's sequence based.
I've to add this line to make it work perfectly :
$metadata->setIdGenerator(new \Doctrine\ORM\Id\AssignedGenerator());
Best regards,
sha...
Visual Studio window which shows list of methods
...class
Resharper help:
http://www.jetbrains.com/resharper/webhelp/Reference__Windows__File_Structure_Window.html
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