大约有 47,000 项符合查询结果（耗时：0.0690秒） [XML]
Change a column type from Date to DateTime during ROR migration
I need to change my column type from date to datetime for an app I am making. I don't care about the data as its still being developed.
...
Why should the “PIMPL” idiom be used? [duplicate]
...l since all members are private: cat_->Purr(); Purr() is not accessible from the outside because by deafult it's private. What am I missing here?
– binaryguy
Aug 14 '15 at 9:20
...
Deleting all files from a folder using PHP?
...ple I had a folder called `Temp' and I wanted to delete or flush all files from this folder using PHP. Could I do this?
17 ...
Accessing UI (Main) Thread safely in WPF
... @l46kok This can have different reasons (console app, hosting from winforms etc.). As @WolfgangZiegler said, you can use any UIElement for it. I just usually use Application.Current for it since it looks cleaner to me.
– Botz3000
Jul 24 '12 at 6:51...
Nested classes' scope?
... @George Note that the example with class A isn't mine, it is from the Python official doc whose I gave link. This example fails and that failure is what is wanted to be shown in this example. In fact list(a + i for i in range(10)) is list((a + i for i in range(10))) that is to say list...
How to open standard Google Map application from my application?
...at the Google Maps app only is used, this stops the intent filter (dialog) from appearing, by using
intent.setPackage("com.google.android.apps.maps");
like so:
String uri = "http://maps.google.com/maps?saddr=" + sourceLatitude + "," + sourceLongitude + "&daddr=" + destinationLatitude + "," ...
Dictionary vs Object - which is more efficient and why?
...
Have you tried using __slots__?
From the documentation:
By default, instances of both old and new-style classes have a dictionary for attribute storage. This wastes space for objects having very few instance variables. The space consumption can become acut...
“Cross origin requests are only supported for HTTP.” error when loading a local file
.... (See Section 4 for full details.)
So even though your file originates from the same host (localhost), but as long as the scheme is different (http / file), they are treated as different origin.
share
|
...
How to tell where a header file is included from?
... answer. Only unfortunate problem is that I couldn't get it to stop Clang from trying to compile the file normally, so I ended up using clang++ -MM -H (which is a slightly useful combination).
– rookie1024
Feb 17 '17 at 17:36
...
Postgresql not creating db with “createdb” as superuser, yet not outputting errors [duplicate]
...
createdb is a command line utility which you can run from bash and not from psql.
To create a database from psql, use the create database statement like so:
create database [databasename];
Note: be sure to always end your SQL statements with ;
...