大约有 40,000 项符合查询结果（耗时：0.0576秒） [XML]
What's the cleanest way of applying map() to a dictionary in Swift?
...tural interpretation of map on dictionaries—both the original poster's example and mine only modify the values, and conceptually, map on an array only modifies the values, not the indices.)
– Brent Royal-Gordon
Jan 17 '15 at 1:42
...
Where is my .vimrc file?
...te this file, it will ignore all settings in the system vimrc file. (For example /etc/vim/vimrc.) This confused me no end after I created a .vimrc, didn't populate it completely with all my usual options (because it was on a server that I didn't intend to do much work on) and it left my vim in a bro...
When should I use cross apply over inner join?
...r
),
t AS
(
SELECT 1 AS id
UNION ALL
SELECT 2
)
SELECT *
FROM t
JOIN q
ON q.rn <= t.id
runs for almost 30 seconds, while this one:
WITH t AS
(
SELECT 1 AS id
UNION ALL
SELECT 2
...
Defining a variable with or without export
...
One more example for this al$ foobar="Whatever" bash
– Alun
Jun 15 '16 at 20:57
...
What does the [Flags] Enum Attribute mean in C#?
...ingle value. Such collections are often used with bitwise operators, for example:
var allowedColors = MyColor.Red | MyColor.Green | MyColor.Blue;
Note that the [Flags] attribute doesn't enable this by itself - all it does is allow a nice representation by the .ToString() method:
enum Suits { Spa...
Which letter of the English alphabet takes up most pixels?
...n 'Arial Black' on my MacBook in Chrome, lowercase m is the widest, by a small margin.
– Earl Jenkins
Feb 14 '12 at 22:25
15
...
SVN Error - Not a working copy
...tion in first paragraph does not work on my system (W7+Cygwin). Rather rm & svn update did it.
– Jukka Dahlbom
May 2 '12 at 12:54
17
...
How to handle Objective-C protocols that contain properties?
...
Here's an example of mine that works perfectly, the protocol definition first of all:
@class ExampleClass;
@protocol ExampleProtocol
@required
// Properties
@property (nonatomic, retain) ExampleClass *item;
@end
Below is a working...
How do you run a crontab in Cygwin on Windows?
...
You need to also install cygrunsrv so you can set cron up as a windows service, then run cron-config.
If you want the cron jobs to send email of any output you'll also need to install either exim or ssmtp (before running cron-config.)
See /usr/...
How can I convert an RGB image into grayscale in Python?
...
SciPy's image I/O is literally PIL/Pillow. Hence, testing SciPy is effectively retesting PIL/Pillow with negligible overhead introduced by SciPy's wrapper functions. It would have been much more useful to substitute OpenCV (which does not leverage PIL...