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Shall we always use [unowned self] inside closure in Swift
... in order to make sure that it is still around by the time the closure is called.
Example: Making an asynchronous network request
If you are making an asynchronous network request you do want the closure to retain self for when the request finishes. That object may have otherwise been deallocated ...
C/C++ macro string concatenation
...rings you can just do:
#define STR3 STR1 STR2
The preprocessor automatically concatenates adjacent strings.
EDIT:
As noted below, it's not the preprocessor but the compiler that does the concatenation.
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Does Java SE 8 have Pairs or Tuples?
..., value[i]) , then filter based on the second value[i] element, and finally output just the indices.
9 Answers
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Android: What's the difference between Activity.runOnUiThread and View.post?
...ivity.
In both cases, if not on UI thread, Handler#post(Runnable) will be called behind the scenes.
As CommonsWare mentioned in the comment, there is a difference between the two - when called on Ui thread, Activity#runOnUiThread will call the run method directly, while View#post will post the runna...
How do I squash two non-consecutive commits?
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Initially, I read it as "rebase D onto A, squash D into A, then rebase B onto DA". It's not clear from the answer that this can be done by reordering lines in a text editor.
– Victor Sergienko
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How to slice an array in Bash
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There is also a convenient shortcut to get all elements of the array starting with specified index. For example "${A[@]:1}" would be the "tail" of the array, that is the array without its first element.
version=4.7.1
A=( ${version//\./ } )
echo "${A[@]}" # 4 7 1
B...
Where is a complete example of logging.config.dictConfig?
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All those concise, beautiful YAML snippets in the python logging.config docs just can't be read directly. Bummer.
– JimB
May 17 '18 at 18:19
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KnockOutJS - Multiple ViewModels in a single View
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If they all need to be on the same page, one easy way to do this is to have a master view model containing an array (or property list) of the other view models.
masterVM = {
vmA : new VmA(),
vmB : new VmB(),
vmC : new Vm...
angularJS: How to call child scope function in parent scope
How can call a method defined in child scope from its parent scope?
4 Answers
4
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How can I use a local image as the base image with a dockerfile?
...ockerfile.
I just realised that I've been using FROM with indexed images all along.
4 Answers
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