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iphone ios running in separate thread
...and easy to use. The code to do some processing on a background thread and then do something with the results in the main run loop is incredibly easy and compact:
dispatch_async( dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
// Add code here to do background processing
/...
How can I represent an 'Enum' in Python?
...
@Longpoke if you have 100 values, then you're definitely doing something wrong ;) I like numbers associated with my enums ... they are easy to write (vs strings), can be easily persisted in a database, and are compatible with the C/C++ enum, which makes for ...
Why are Oracle table/column/index names limited to 30 characters?
...new feature, either... they'd spend a lot of time extending the limit, and then announce "you can now use names longer than 30 characters!". They'd be the laughing stock.
– skaffman
Sep 7 '09 at 8:46
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When to dispose CancellationTokenSource?
...k telling you they're done with it. This is going to happen every now and then because of the nature of what CancellationToken is used for, and it's really OK, I promise.
– Joe Amenta
Jun 13 '15 at 12:05
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How to dismiss notification after action has been clicked
...es. This intermediary activity without any UI cancels the notification and then starts the activity I really wanted to start from the notification.
I've posted sample code in a related post Clicking Android Notification Actions does not close Notification drawer.
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What is the difference between “#!/usr/bin/env bash” and “#!/usr/bin/bash”?
...ou can use /usr/bin/env -S on some versions of env to get around this, but then the script will become even less portable and break on fairly recent systems (e.g. even Ubuntu 16.04 if not later).
Another downside is that since you aren't calling an explicit executable, it's got the potential for mi...
How to check if an email address exists without sending an email?
...pproach is to use a simple regex to block obviously invalid addresses, and then send an actual email with a link back to your system that will validate the email was received. This also ensures that they user entered their actual email, not a slight typo that happens to belong to somebody else.
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Secondary axis with twinx(): how to add to legend?
...gend(loc=0)
You'll get this:
But if you want all labels on one legend then you should do something like this:
import numpy as np
import matplotlib.pyplot as plt
from matplotlib import rc
rc('mathtext', default='regular')
time = np.arange(10)
temp = np.random.random(10)*30
Swdown = np.random.r...
How to check that an element is in a std::set?
...end()) needs to do a tree lookup to find the element first - if not found, then you need to do a second tree lookup to find the correct insertion location. The original variant if(container.insert(foo).second) {...} has the charm that it needs just one single tree lookup...
– A...
Nested or Inner Class in PHP
...nly used in one place.
If a class is useful to only one other class, then it is logical to
relate and embed it in that class and keep the two together.
It increases encapsulation.
Consider two top-level classes, A and B, where B needs access to
members of A that would otherwise be ...