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How do I set up a simple delegate to communicate between two view controllers?
...unately, I'm getting a "Cannot find protocol declaration for 'MyProtocol'" error when I try to compile. It's as you described, though: the spawned viewcontroller has the procotol definition in its .h file and invokes the protocol method in its .m file. The hosting viewcontroller has <MyProtocol...
How to implement a good __hash__ function in python [duplicate]
... are equal. It also shouldn't change over the lifetime of the object; generally you only implement it for immutable objects.
A trivial implementation would be to just return 0. This is always correct, but performs badly.
Your solution, returning the hash of a tuple of properties, is good. But note...
Passing parameters to addTarget:action:forControlEvents
...wsDetails: method here. You just create a selector to make button able to call it when certain action occurs (touch up in your case). Controls can use 3 types of selectors to respond to actions, all of them have predefined meaning of their parameters:
with no parameters
action:@selector(switchToN...
PHP mkdir: Permission denied problem
I am trying to create a directory with PHP mkdir function but I get an error as follows: Warning: mkdir() [function.mkdir]: Permission denied in ... . How to settle down the problem?
...
difference between variables inside and outside of __init__()
Is there any difference at all between these classes besides the name?
10 Answers
10
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Rails 2.3-style plugins and deprecation warnings running task in Heroku
I'm upgrading to Rails 3.2, and running rake db:migrate gives me several errors of the form:
8 Answers
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Git status ignore line endings / identical files / windows & linux environment / dropbox / mled
.... There is just a problem that happened with 3 lines printed, showing this error: sh: 1: Syntax error: Unterminated quoted string
– evandro777
Sep 6 '17 at 18:41
...
How to disable zoom on Ctrl+scroll in Visual Studio 2010?
...
Go to Tools->Extension manager, and search the online gallery for "wheel". Download "Disable Mouse Wheel Zoom"
Or use this direct link:
Disable Mouse Wheel Zoom.
share
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impro...
Timeout function if it takes too long to finish [duplicate]
... functools import wraps
import errno
import os
import signal
class TimeoutError(Exception):
pass
def timeout(seconds=10, error_message=os.strerror(errno.ETIME)):
def decorator(func):
def _handle_timeout(signum, frame):
raise TimeoutError(error_message)
def wrap...
How to write a multidimensional array to a text file?
...est.txt', x)
While the same thing would fail (with a rather uninformative error: TypeError: float argument required, not numpy.ndarray) for a 3D array:
import numpy as np
x = np.arange(200).reshape((4,5,10))
np.savetxt('test.txt', x)
One workaround is just to break the 3D (or greater) array into 2...