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When & why to use delegates? [duplicate]
...ach time my delegate is called".
Typical use is of course events. All the OnEventX delegate to the methods the user defines.
Delegates are useful to offer to the user of your objects some ability to customize their behavior.
Most of the time, you can use other ways to achieve the same purpose and ...
What is the difference between packaged_task and async
...the differences if you use a rather long function, such as
//! sleeps for one second and returns 1
auto sleep = [](){
std::this_thread::sleep_for(std::chrono::seconds(1));
return 1;
};
Packaged task
A packaged_task won't start on it's own, you have to invoke it:
std::packaged_task<in...
How do I work around JavaScript's parseInt octal behavior?
...
Why two operations when one binary or would suffice?
– Oleg V. Volkov
Aug 7 '12 at 17:55
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How to sum array of numbers in Ruby?
...our code base most important, but since various communities tend to prefer one word over another, it’s nonetheless useful to know the alternatives.
To emphasize the map-reduce verbiage, here’s a version that is a little bit more forgiving on what ends up in that array.
array.map(&:to_i).re...
Remove portion of a string after a certain character
...s and then only doing this if it does (otherwise just leaving the string alone).
– Austin Fitzpatrick
Apr 15 '13 at 20:42
14
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Xcode 4 hangs at “Attaching to (app name)”
...
Yea I don't think it always works, but it's definitely one of the issues you might encounter
– Rob
Apr 1 '11 at 5:41
...
java.lang.OutOfMemoryError: GC overhead limit exceeded [duplicate]
...ss smoothly. Options that come to mind:
Specify more memory like you mentioned, try something in between like -Xmx512m first
Work with smaller batches of HashMap objects to process at once if possible
If you have a lot of duplicate strings, use String.intern() on them before putting them into the H...
How to set text size of textview dynamically for different screens [duplicate]
...n sp units. This is where the issue is,i.e you have pixels measurements on one hand and sp unit on the other to fix do this:
textView.setTextSize(TypedValue.COMPLEX_UNIT_PX,
getResources().getDimension(R.dimen.textsize));
Note you can also use
getResources().getDimensionPixelSize(R.dimen.tex...
SSH configuration: override the default username [closed]
... while the first example sets a username only. And when you use the second one you don't need to use ssh example.net; ssh example will be enough.
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What exactly is Arel in Rails 3.0?
...bject-oriented language, not a string-oriented language. For that reason alone, it makes sense to represent queries as objects instead of strings. Building a proper object model for queries instead of using strings for everything gives you pretty much the same benefits that building a proper object ...