大约有 45,000 项符合查询结果(耗时:0.0445秒) [XML]
capturing self strongly in this block is likely to lead to a retain cycle
...
The capture of self here is coming in with your implicit property access of self.timerDisp - you can't refer to self or properties on self from within a block that will be strongly retained by self.
You can get around this by creating a weak reference to self bef...
“Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP
... vast wisdom of the PHP Manual:
Relying on the default value of an uninitialized variable is problematic in the case of including one file into another which uses the same variable name. It is also a major security risk with register_globals turned on. E_NOTICE level error is issued in case of w...
How to get the concrete class name as a string? [duplicate]
...t want to instantiate the class? can you just get the name of the class? (without the object)
– Gabriel
Oct 15 '13 at 23:17
28
...
Facebook Callback appends '#_=_' to Return URL
...p; history.pushState) {
window.history.pushState("", document.title, window.location.pathname);
} else {
// Prevent scrolling by storing the page's current scroll offset
var scroll = {
top: document.body.scrollTop,
left: doc...
How to convert JSON data into a Python object
...
UPDATE
With Python3, you can do it in one line, using SimpleNamespace and object_hook:
import json
from types import SimpleNamespace
data = '{"name": "John Smith", "hometown": {"name": "New York", "id": 123}}'
# Parse JSON into an ...
Get __name__ of calling function's module in Python
...p://docs.python.org/library/inspect.html
Also, Doug Hellmann has a nice writeup of the inspect module in his PyMOTW series:
http://pymotw.com/2/inspect/index.html#module-inspect
EDIT: Here's some code which does what you want, I think:
def info(msg):
frm = inspect.stack()[1]
mod = inspec...
SQL Server Insert if not exists
... Assunto = @_ASSUNTO
AND Data = @_DATA);
END
replace with
BEGIN
IF NOT EXISTS (SELECT * FROM EmailsRecebidos
WHERE De = @_DE
AND Assunto = @_ASSUNTO
AND Data = @_DATA)
BEGIN
INSERT INTO EmailsRecebidos (De,...
Getting list of parameter names inside python function [duplicate]
...follow
|
edited Jul 31 '18 at 8:22
answered Oct 29 '10 at 11:40
...
How to capture stdout output from a Python function call?
... sys.stdout = self._stringio = StringIO()
return self
def __exit__(self, *args):
self.extend(self._stringio.getvalue().splitlines())
del self._stringio # free up some memory
sys.stdout = self._stdout
Usage:
with Capturing() as output:
do_something(my_ob...
How do the likely/unlikely macros in the Linux kernel work and what is their benefit?
...
They are hint to the compiler to emit instructions that will cause branch prediction to favour the "likely" side of a jump instruction. This can be a big win, if the prediction is correct it means that the jump instruction is basically free and will take zero ...