大约有 7,000 项符合查询结果（耗时：0.0372秒） [XML]
When and why should I use a namedtuple instead of a dictionary? [duplicate]
...nces of a class like:
class Container:
def __init__(self, name, date, foo, bar):
self.name = name
self.date = date
self.foo = foo
self.bar = bar
mycontainer = Container(name, date, foo, bar)
and not change the attributes after you set them in __init__, you cou...
设置用户默认权限 Umask命令详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...后演示的方便性，先在Windows上用7-zip创建两个文件：
foo.zip（包括：目录foo_dir，文件foo_file）
bar.tar（包括：目录bar_dir，文件bar_file）
当然，你可以不用Windows，我之所以这样做，只是为了稍后抖个包袱而已。
把这两个文件...
Import module from subfolder
... package you should include the "root" packagename as well, e.g.:
from dirFoo.dirFoo1.foo1 import Foo1
from dirFoo.dirFoo2.foo2 import Foo2
Or you can use relative imports:
from .dirfoo1.foo1 import Foo1
from .dirfoo2.foo2 import Foo2
...
What is the lifetime of a static variable in a C++ function?
...tter() { cout << "Destroyed " << str << endl; }
};
void foo(bool skip_first)
{
if (!skip_first)
static emitter a("in if");
static emitter b("in foo");
}
int main(int argc, char*[])
{
foo(argc != 2);
if (argc == 3)
foo(false);
}
Output:
C:>sam...
(How) can I count the items in an enum?
...good way to do this, usually you see an extra item in the enum, i.e.
enum foobar {foo, bar, baz, quz, FOOBAR_NR_ITEMS};
So then you can do:
int fuz[FOOBAR_NR_ITEMS];
Still not very nice though.
But of course you do realize that just the number of items in an enum is not safe, given e.g.
enum...
`new function()` with lower case “f” in JavaScript
...on () {
var instance = {},
inner = 'some value';
instance.foo = 'blah';
instance.get_inner = function () {
return inner;
};
instance.set_inner = function (s) {
inner = s;
};
return instance;
})();
The purpose of the new operator is to create ...
jquery selector for id starts with specific text [duplicate]
...;
// Select all elements that have an attribute whose value has the word foobar
$("[attribute~='foobar']");
// Select all elements that have an attribute whose value starts with 'foo' and ends
// with 'bar'
$("[attribute^='foo'][attribute$='bar']");
attribute in the code above can be changed ...
What's the correct way to convert bytes to a hex string in Python 3?
...ascii module:
>>> import binascii
>>> binascii.hexlify('foo'.encode('utf8'))
b'666f6f'
>>> binascii.unhexlify(_).decode('utf8')
'foo'
See this answer:
Python 3.1.1 string to hex
share
|...
find: missing argument to -exec
...this example:
$ cat /tmp/echoargs
#!/bin/sh
echo $1 - $2 - $3
$ find /tmp/foo -exec /tmp/echoargs {} \;
/tmp/foo - -
/tmp/foo/one - -
/tmp/foo/two - -
$ find /tmp/foo -exec /tmp/echoargs {} +
/tmp/foo - /tmp/foo/one - /tmp/foo/two
Your command has two errors:
First, you use {};, but the ; must b...
How do you test functions and closures for equality?
...b is ObjBlock: \(b is ObjBlock), objA === objB: \(objA === objB)"
}
class Foo
{
lazy var swfBlock: ObjBlock = self.swf
func swf() { print("swf") }
@objc func obj() { print("obj") }
}
let swfBlock: SwfBlock = { print("swf") }
let objBlock: ObjBlock = { print("obj") }
let foo: Foo = Foo(...