大约有 46,000 项符合查询结果（耗时：0.0853秒） [XML]
What are free monads?
...r monad, and the second one gives you a way to "get out" of it.
More generally, if X is a Y with some extra stuff P, then a "free X" is a a way of getting from a Y to an X without gaining anything extra.
Examples: a monoid (X) is a set (Y) with extra structure (P) that basically says it has an ope...
UPDATE multiple tables in MySQL using LEFT JOIN
I have two tables, and want to update fields in T1 for all rows in a LEFT JOIN.
5 Answers
...
How to find out element position in slice?
...
this does not find the original index; rather it loses all the indexes by re-ordering them
– newacct
Nov 29 '11 at 20:16
...
Using NSPredicate to filter an NSArray based on NSDictionary keys
...
It should work - as long as the data variable is actually an array containing a dictionary with the key SPORT
NSArray *data = [NSArray arrayWithObject:[NSMutableDictionary dictionaryWithObject:@"foo" forKey:@"BAR"]];
NSArray *filtered = [data filteredArrayUsingPredicate:[N...
Check if my app has a new version on AppStore
I would like to manually check if there are new updates for my app while the user is in it, and prompt him to download the new version. Can I do this by checking the version of my app in the app store - programatically?
...
SQL Server - transactions roll back on error?
...xact_abort on before your transaction to make sure sql rolls back automatically in case of error.
share
|
improve this answer
|
follow
|
...
How should you build your database from source control?
... production environments in deployment scripts?
Use templates, so that actually you would produce different set of scripts for each environment (ex. references to external systems, linked databases, etc)
How do you test that the deployment scripts will work as effectively against production as they ...
How fast is D compared to C++?
...
To enable all optimizations and disable all safety checks, compile your D program with the following DMD flags:
-O -inline -release -noboundscheck
EDIT: I've tried your programs with g++, dmd and gdc. dmd does lag behind, but gdc ac...
How to generate gcc debug symbol outside the build target?
...R=Joe Developer joe.developer@somewhere.com
VCS: COMMIT_DATE=2013-12-19
All that is left is to check-out the original code, re-compile without optimizations, and start debugging.
share
|
im...
What do parentheses surrounding an object/function/class declaration mean? [duplicate]
... useful construct when trying to hide variables from the parent namespace. All the code within the function is contained in the private scope of the function, meaning it can't be accessed at all from outside the function, making it truly private.
See:
http://en.wikipedia.org/wiki/Closure_%28comput...