大约有 10,900 项符合查询结果（耗时：0.0370秒） [XML]
What is a 'semantic predicate' in ANTLR?
What is a semantic predicate in ANTLR?
2 Answers
2
...
What is a Proxy in Doctrine 2?
...ery:
SELECT u.id, u.username FROM Entity\User u WHERE u.id = :id
As you can see this query doesn't return firstname and lastname properties, therefore you cannot create User object. Creation of incomplete entity could lead to unexpected errors.
That's why Doctrine will create UserProxy object th...
What specifically are wall-clock-time, user-cpu-time, and system-cpu-time in UNIX?
I can take a guess based on the names, but what specifically are wall-clock-time, user-cpu-time, and system-cpu-time in UNIX?
...
Is python's sorted() function guaranteed to be stable?
...n that it should be returning the original [(1, 2), (1, 1)] input? In that case, you have be explicit and say sorted([(1, 2), (1, 1)], key=lambda t: t[0])
– code_dredd
Sep 1 '17 at 0:38
...
Haskell testing workflow
...ools.
test-framework provides a one-stop shop to run all your HUnit test-cases and QuickCheck properties all from one harness.
Code coverage is built into GHC in the form of the HPC tool.
Criterion provides some pretty great benchmarking machinery
I'll use as a running example a package that I j...
Proper Linq where clauses
...ere are many ways to write them and each have the same results as far as I can tell. For example;
5 Answers
...
How to make a element expand or contract to its parent container?
... <svg> element expand to the size of its parent container, in this case a <div> , no matter how big or small that container may be.
...
How to play with Control.Monad.Writer in haskell?
...create writers using the writer function. For example, in a ghci session I can do
ghci> import Control.Monad.Writer
ghci> let logNumber x = writer (x, ["Got number: " ++ show x])
Now logNumber is a function that creates writers. I can ask for its type:
ghci> :t logNumber
logNumber :: (S...
Assign pandas dataframe column dtypes
...eric
(As mentioned below, no more "magic", convert_objects has been deprecated in 0.17)
df = pd.DataFrame({'x': {0: 'a', 1: 'b'}, 'y': {0: '1', 1: '2'}, 'z': {0: '2018-05-01', 1: '2018-05-02'}})
df.dtypes
x object
y object
z object
dtype: object
df
x y z
0 a 1 2018-0...
Is .NET Remoting really deprecated?
...rate that is. I haven't seen any official word that Remoting is being deprecated, and it seems to me there are certainly scenarios where Remoting makes more sense than WCF. None of the Remoting-related objects or methods have been deprecated, even in version 4.0 of the framework. It is also my under...