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setNeedsLayout vs. setNeedsUpdateConstraints and layoutIfNeeded vs updateConstraintsIfNeeded
...ates one of your constraints, you should remove the constraint immediately and call setNeedsUpdateConstraints. In fact, that’s the only case where you should have to trigger a constraint update pass.
In addition, in my experience, I have never had to invalidate constraints, and not set the setNe...
LINQ query to return a Dictionary
...ction of MyClass that I'd like to query using LINQ to get distinct values, and get back a Dictionary as the result, but I can't figure out how I can do it any simpler than I'm doing below. What would some cleaner code be that I can use to get the Dictionary as my result?
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Java packages com and org
What are the meaning of the packages org and com in Java?
4 Answers
4
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What are the differences between PMD and FindBugs?
There was a question comparing PMD and CheckStyle . However, I can't find a nice breakdown on the differences/similarities between PMD and FindBugs. I believe a key difference is that PMD works on source code, while FindBugs works on compiled bytecode files. But in terms of capabilities, should it ...
JsonMappingException: out of START_ARRAY token
...is malformed: the type of center is an array of invalid objects. Replace [ and ] with { and } in the JSON string around longitude and latitude so they will be objects:
[
{
"name" : "New York",
"number" : "732921",
"center" : {
"latitude" : 38.895111,
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Wait for a void async method
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Best practice is to mark function async void only if it is fire and forget method, if you want to await on, you should mark it as async Task.
In case if you still want to await, then wrap it like so await Task.Run(() => blah())
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Simulate airplane mode in iPhone Simulator
... emulate the iPhone; it's just an environment for Mac apps to link against and look like an iPhone. So you need a way, at the system layer, to restrict an app from talking to the network. Unix doesn't provide that; it would almost certainly need kernel support to get it. You could do it more easily ...
Nginx Different Domains on Same IP
...y server {} blocks, the sever_name directives were wildcards: .domain1.com and .domain2.com. Changing them to server_name www.domain1.com domain1.com; and server_name www.domain2.com domain2.com; now has the correct page for each site displaying when those addresses are used.
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Why is MySQL's default collation latin1_swedish_ci?
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He is Finnish , but Finnish and Swedish share almost the same special characters ,so they share the same case insensitive collation
– kommradHomer
Feb 26 '14 at 10:47
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How to change field name in Django REST Framework
...serializers.SerializerMethodField:
Here is the model Park, which has name and alternate_name fields.
class Park(models.Model):
name = models.CharField(max_length=256)
alternate_name = models.CharField(max_length=256, blank=True)
objects = models.GeoManager()
class Meta:
...