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Java Generics Wildcarding With Multiple Classes
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Actually, you can do what you want. If you want to provide multiple interfaces or a class plus interfaces, you have to have your wildcard look something like this:
<T extends ClassA & InterfaceB>
See the Generics Tutorial at sun....
Polymorphism: Why use “List list = new ArrayList” instead of “ArrayList list = new ArrayList”? [dupl
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The main reason you'd do this is to decouple your code from a specific implementation of the interface. When you write your code like this:
List list = new ArrayList();
the rest of your code only knows that data is of type List, which is pref...
Adding :default => true to boolean in existing Rails column
...xisting column. So I tried the change_column suggestion but I mustn't be doing it right.
7 Answers
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How do I create a new line in Javascript?
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Use the \n for a newline character.
document.write("\n");
You can also have more than one:
document.write("\n\n\n"); // 3 new lines! My oh my!
However, if this is rendering to HTML, you will want to use the HTML tag for a newline:
document.write("<br&...
How to create Gmail filter searching for text only at start of subject line?
...ch)) the list of pre-canned feature requests, so the answer is "you cannot do this via the Gmail web UI" :-(
There are no current Labs features which offer this. SIEVE filters would be another way to do this, that too was not supported, there seems to no longer be any definitive statement on SIEVE...
New to unit testing, how to write great tests? [closed]
...even if the final behavior of the method did not change.
I think you are doing it wrong.
A unit test should:
test one method
provide some specific arguments to that method
test that the result is as expected
It should not look inside the method to see what it is doing, so changing the interna...
How do you unit test a Celery task?
The Celery documentation mentions testing Celery within Django but doesn't explain how to test a Celery task if you are not using Django. How do you do this?
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Internal typedefs in C++ - good style or bad style?
Something I have found myself doing often lately is declaring typedefs relevant to a particular class inside that class, i.e.
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What do the makefile symbols $@ and $< mean?
What do the $@ and $< do exactly?
6 Answers
6
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pandas: How do I split text in a column into multiple rows?
...split by a specific delimiter. I was wondering if there is a simple way to do this using pandas or python?
6 Answers
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