大约有 16,100 项符合查询结果（耗时：0.0261秒） [XML]
@selector() in Swift?
...g the right KeyPath-based API instead of selectors if appropriate.
You can read more about selectors under Interacting with Objective-C APIs in Using Swift with Cocoa and Objective-C.
Note: Before Swift 2.2, Selector conformed to StringLiteralConvertible, so you might find old code where bare string...
What is setup.py?
....py
│ ├── __init__.py
│ └── internals.py
├── README
├── requirements.txt
└── setup.py
Then, you do the following in your setup.py script so that it can be installed on some machine:
from setuptools import setup
setup(
name='foo',
version='1.0',
...
Obtain Bundle Identifier programmatically
...
(you can delete this comment) but I love the feeling of reading the answer then in the comment, see something like @Jonny s and Tim (although you can see this in another whole answer), it links to something else that still relevant and useful. Thanks for great community guys.
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How to launch html using Chrome at “--allow-file-access-from-files” mode?
...
This answer is just spreading fear. The --allow-file-access-from-files option allows a file:// webpage access to other file:// resources, that's all. It does not leave your file system open.
– GetFree
Oct 23 ...
In Python, what is the difference between “.append()” and “+= []”?
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@jamesdlin yup! But it's easy to be mistaken unless you already know this. A little additional precision has never hurt anyone, right?
– Joe
Sep 29 '16 at 12:36
...
What's the difference between SortedList and SortedDictionary?
...+----------+----------+---------+
* Insertion is O(1) for data that are already in sort order, so that each
element is added to the end of the list (assuming no resize is required).
From an implementation perspective:
+------------+---------------+----------+------------+------------+--------...
MySQL “incorrect string value” error when save unicode string in Django
..., I changed all the character sets on everything I could until I really re-read this answer: columns can have their own character sets, independent of the tables and the database. That's crazy and also was exactly my problem.
– markpasc
Jul 18 '11 at 17:43
...
Remove redundant paths from $PATH variable
...$ pathappend /sbin
$ pathappend /bin
$ pathappend /usr/games
But, unless readability is the concern, at this point you're better off just doing:
$ export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
Would the above work in all shells known to man?
I would presum...
node.js hash string?
...ar fs = require('fs');
var md5sum = crypto.createHash('md5');
var s = fs.ReadStream(filename);
s.on('data', function(d) {
md5sum.update(d);
});
s.on('end', function() {
var d = md5sum.digest('hex');
console.log(d + ' ' + filename);
});
...
How to keep environment variables when using sudo
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First you need to export HTTP_PROXY. Second, you need to read man sudo carefully, and pay attention to the -E flag. This works:
$ export HTTP_PROXY=foof
$ sudo -E bash -c 'echo $HTTP_PROXY'
Here is the quote from the man page:
-E, --preserve-env
Indicates to the se...