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Differences between Proxy and Decorator Pattern
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Fully agree Sir. I would convert that in other words what I meant was with Proxy Pattern, the proxy class can hide the detail information of an object from its client. Therefore, when using Proxy Pattern, we usually create an instance of abject insid...
How to style dt and dd so they are on the same line?
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This behaves awkwardly when you select (double click) the first word in the <dd>. It also selects the text inside the <dt> unless there's whitespace (or an &nbsp; if you're using htmlmin) between the <dt> and <dd>.
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ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.al
...al code
mask = ((r["dt"] >= startdate) & (r["dt"] <= enddate))
selected = r[mask]
looks correct. However, if you do want and, then instead of a and b use (a-b).any() or (a-b).all().
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Maintain/Save/Restore scroll position when returning to a ListView
... - mList.getPaddingTop());
// ...
// restore index and position
mList.setSelectionFromTop(index, top);
Explanation:
ListView.getFirstVisiblePosition() returns the top visible list item. But this item may be partially scrolled out of view, and if you want to restore the exact scroll position of t...
IntelliJ beginning of file keyboard shortcut
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To select a block quickly: SHIFT-FN-CMD + UP/DOWN ARROW KEYS .. this solution got me on the right path - thanks!
– Gene Bo
Apr 14 '15 at 19:05
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difference between primary key and unique key
...ey, unique key, etc are collectively called as Candidate Key.
However, DBA selected a key from candidate key for searching records is called Primary key.
Difference between Primary Key and Unique key
1. Behavior: Primary Key is used to identify a row (record) in a table, whereas Unique-key is to...
explicit casting from super class to subclass
...[] args)
{
Dog d = getMeAnAnimal();// ERROR: Type mismatch: cannot convert Animal to Dog
Dog d = (Dog)getMeAnAnimal(); // Downcast works fine. No ClassCastException :)
d.eat();
}
private static Animal getMeAnAnimal()
{
Animal animal = new Dog();
return animal;
}
However, ...
The communication object, System.ServiceModel.Channels.ServiceChannel, cannot be used for communicat
...happen on your server side, and you didn't catch and handle it, and didn't convert it to a SOAP fault, either.
Now since the server side "bombed" out, the WCF runtime has "faulted" the channel - e.g. the communication link between the client and the server is unusable - after all, it looks like you...
efficient circular buffer?
...s answer is very misleading - Python's deque appears to be quite fast, but converting from and to numpy arrays slows it down considerably in the benchmarks you link to.
– xitrium
Dec 11 '19 at 18:09
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wkhtmltopdf: cannot connect to X server
I have been using wkthmltopdf to convert html to pdf documents on-the-fly on my linux web server. The program originally needed X11 or similar X server to run correctly, but through many requests by developers to have this run on servers without GUI, I am pretty sure it runs a virtual X server in...