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How do you trigger a block after a delay, like -performSelector:withObject:afterDelay:?
...ion of my block for 10 seconds.
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 10 * NSEC_PER_SEC), dispatch_get_main_queue(), ^{
NSLog(@"parameter1: %d parameter2: %f", parameter1, parameter2);
});
More: https://developer.apple.com/documentation/dispatch/1452876-dispatch_after
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How to change a nullable column to not nullable in a Rails migration?
I created a date column in a previous migration and set it to be nullable. Now I want to change it to be not nullable. How do I go about doing this assuming there are null rows in that database? I'm ok with setting those columns to Time.now if they're currently null.
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Controlling fps with requestAnimationFrame?
...t seems like requestAnimationFrame is the de facto way to animate things now. It worked pretty well for me for the most part, but right now I'm trying to do some canvas animations and I was wondering: Is there any way to make sure it runs at a certain fps? I understand that the purpose of rAF is f...
Convert python datetime to epoch with strftime
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import time
from datetime import datetime
now = datetime.now()
time.mktime(now.timetuple())
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Setting the default value of a DateTime Property to DateTime.Now inside the System.ComponentModel De
Does any one know how I can specify the Default value for a DateTime property using the System.ComponentModel DefaultValue Attribute?
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Get Output From the logging Module in IPython Notebook
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For anyone trying to do this in Python 3: reload is now imp.reload
– kuzzooroo
Jan 15 '15 at 17:09
11
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How do I get today's date in C# in mm/dd/yyyy format?
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DateTime.Now.ToString("M/d/yyyy");
http://msdn.microsoft.com/en-us/library/8kb3ddd4.aspx
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AngularJS: Service vs provider vs factory
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Why do I get Unknown provider: helloWorldProvider <- helloWorld when running this locally? Commenting it out, same error for the other 2 examples. Is there some hidden provider configuration ? (Angular 1.0.8) -- Found: stackoverflow.com/q...
Format timedelta to string
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As you know, you can get the total_seconds from a timedelta object by accessing the .seconds attribute.
Python provides the builtin function divmod() which allows for:
s = 13420
hours, remainder = divmod(s, 3600)
minutes, seconds =...
In the shell, what does “ 2>&1 ” mean?
...file
Mon Jan 7 13:18:21 CET 2013
The file is overwritten each time, well now:
$ set -o noclobber
$ date > $testfile ; cat $testfile
bash: /tmp/testNoClobberDate-WW1xi9: cannot overwrite existing file
Mon Jan 7 13:18:21 CET 2013
$ date > $testfile ; cat $testfile
bash: /tmp/testNoClobberDa...