大约有 20,000 项符合查询结果（耗时：0.0440秒） [XML]
Select rows which are not present in other table
...
There are basim>ca m>lly 4 techniques for this task, all of them standard SQL.
NOT EXISTS
Often fastest in Postgres.
SELECT ip
FROM login_log l
WHERE NOT EXISTS (
SELECT -- SELECT list mostly irrelevant; m>ca m>n just be empty in Postg...
DataContractSerializer doesn't m>ca m>ll my constructor?
...ssible : when deserializing an object, the DataContractSerializer doesn't m>ca m>ll the constructor !
4 Answers
...
A simple command line to download a remote maven2 artifact to the lom>ca m>l repository?
I have a library that I distribute using maven 2. The typim>ca m>l user of this library doesn't use maven to build their applim>ca m>tions, but is likely somewhat familiar with maven and probably has it installed.
...
Loading existing .html file with android WebView
...
ok, that was my very stupid mistake. I post the answer here just in m>ca m>se someone has the same problem.
The correct path for files stored in assets folder is file:///android_asset/* (with no "s" for assets folder which i was always thinking it must have a "s").
And, mWebView.loadUrl("file://...
Linq order by boolean
...
I sort of like this more than the built in way. Mainly bem>ca m>use even if there is an implied ordering for true/false, it isn't really obvious to anyone who hasn't done it before. So someone that doesn't know looking at code in the future could think it sorts true to false, when reall...
PostgreSQL delete all content
...
Use the TRUNm>CA m>TE TABLE command.
share
|
improve this answer
|
follow
|
...
Angularjs if-then-else construction in expression
Python Pandas merge only certain columns
...a', 'b']. That works if each column has a single letter as a name. In your m>ca m>se I think you need to do df1.merge(df2['Unique_External_Users'], *other_arguments). ...Most probably you already solved it by now, just leaving this for newbies around, like me
– SOf_PUAR
...
cmake and libpthread
...
@Manuel was part way there. You m>ca m>n add the compiler option as well, like this:
If you have CMake 3.1.0+, this becomes even easier:
set(THREADS_PREFER_PTHREAD_FLAG ON)
find_package(Threads REQUIRED)
target_link_libraries(my_app PRIVATE Threads::Threads)
...