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Automatic Retina images for web sites
... Also, no double loading is a huge boon. This means you never waste anyone's bandwidth.
– andrewb
Apr 18 '16 at 3:05
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Collections.emptyMap() vs new HashMap()
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+1 for the Effective Java reference. One nit: I would recommend parameterizing Set and HashSet in your examples, since the whole point of the emptySet() method and friends (as opposed to the constants Collections.EMPTY_SET etc.) is that they play nicely with gen...
How to pass an array within a query string?
...i-value form fields, i.e. submitting arrays through GET/POST vars, can be done several different ways, as a standard is not necessarily spelled out.
Three possible ways to send multi-value fields or arrays would be:
?cars[]=Saab&cars[]=Audi (Best way- PHP reads this into an array)
?cars=Saab&...
Is there a simple way to delete a list element by value?
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To clarify for anyone skimming, it "fails" in the sense that it raises a ValueError exception.
– Casey Falk
Jul 4 '14 at 17:50
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Disabling implicit animations in -[CALayer setNeedsDisplayInRect:]
...isable fade in / out animations on insertion or change of sublayers within one of my layers, as well as changes in the size and contents of the layer. I believe the contents key is the one you're looking for in order to prevent the crossfade on updated drawing.
Swift version:
let newActions = [...
Runnable with a parameter?
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Well it's been almost 9 years since I originally posted this and to be honest, Java has made a couple improvements since then. I'll leave my original answer below, but there's no need for people to do what is in it. 9 years ago, during code review I would have questioned why they did it and maybe...
How do I merge a list of dicts into a single dict?
...h your output because dicts are unordered
if the dicts can have more than one key/value
>>> dict(j for i in L for j in i.items())
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How do you 'redo' changes after 'undo' with Emacs?
...Undo insert "I love spam"
Now, when you undo, the first thing that is undone is the undo. Resulting in your original stack (and document state):
Insert "foo"
Insert "bar"
Insert "I love spam"
If you do a modifying command to break the undo sequence, that command is added after the undo and is...
What do ellipsis […] mean in a list?
...ption is not ambiguous (it's backward pointing to a list but there is only one list so it must be that one). In other cases may be however ambiguous... for example in
[1, [2, [...], 3]]
the backward reference could either point to the outer or to the inner list.
These two different structures pri...
Why is creating a new process more expensive on Windows than Linux?
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mweerden: NT has been designed for multi-user from day one, so this is not really a reason. However, you are right about that process creation plays a less important role on NT than on Unix as NT, in contrast to Unix, favors multithreading over multiprocessing.
Rob, it is true t...