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Completion block for popViewController
...t offer any options for this. However by using the CoreAnimation framework it's possible to add a completion block to the underlying animation:
[CATransaction begin];
[CATransaction setCompletionBlock:^{
// handle completion here
}];
[self.navigationController popViewControllerAnimated:YES];
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JavaScript DOM remove element
I'm trying to test if a DOM element exists, and if it does exist delete it, and if it doesn't exist create it.
5 Answers
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How to force a web browser NOT to cache images
I am writing and using a very simple CGI-based (Perl) content management tool for two pro-bono websites. It provides the website administrator with HTML forms for events where they fill the fields (date, place, title, description, links, etc.) and save it. On that form I allow the administrator to u...
How do I speed up the gwt compiler?
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Let's start with the uncomfortable truth: GWT compiler performance is really lousy. You can use some hacks here and there, but you're not going to get significantly better performance.
A nice performance hack you can do is to compile for...
GitHub: How to make a fork of public repository private?
How can I fork a public repository, but make my fork private? I do have the subscription to support private repositories.
6...
Error: request entity too large
I'm receiving the following error with express:
19 Answers
19
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What is the difference between JOIN and JOIN FETCH when using JPA and Hibernate
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So, if you use the second query, you will not need to do a new query to hit the database again to see the Departments of each Employee.
You can use the second query when you are sure that you will need the Department of each Employee. If you not need the Department, use the first query.
I recome...
Abusing the algebra of algebraic data types - why does this work?
...aic' expression for algebraic data types looks very suggestive to someone with a background in mathematics. Let me try to explain what I mean.
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Center a position:fixed element
I would like to make a position: fixed; popup box centered to the screen with a dynamic width and height. I used margin: 5% auto; for this. Without position: fixed; it centers fine horizontally, but not vertically. After adding position: fixed; , it's even not centering horizontally.
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The modulo operation on negative numbers in Python
...) / 4 = -1.25 --> floor(-1.25) = -2
(-5) % 4 = (-2 × 4 + 3) % 4 = 3.
It is chosen over the C behavior because a nonnegative result is often more useful. An example is to compute week days. If today is Tuesday (day #2), what is the week day N days before? In Python we can compute with
return (2...