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What is the difference between up-casting and down-casting with respect to class variable

What is the difference between up-casting and down-casting with respect to class variable? 10 Answers ...
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How do I scroll to an element within an overflowed Div?

I have 20 list items inside of a div that can only show 5 at a time. What is a good way to scroll to item #10, and then item #20? I know the height of all the items. ...
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What are the uses of the exec command in shell scripts? [closed]

Can anyone explain what are the uses of the exec command in shell scripting with simple examples? 2 Answers ...
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Why is the Fibonacci series used in agile planning poker? [closed]

.... I think it's because they add an air of legitimacy (Fibonacci! math!) to what is in essence a very high-level, early-stage sizing (not scoping) exercise (which does have value). But you can get the same results using t-shirt sizing... ...
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What is JavaScript garbage collection?

What is JavaScript garbage collection? What's important for a web programmer to understand about JavaScript garbage collection, in order to write better code? ...
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onKeyPress Vs. onKeyUp and onKeyDown

What is the difference between these three events? Upon googling I found that: 12 Answers ...
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Make xargs execute the command once for each line of input

...uestion, which was quite specifically about lines of input. That's exactly what -L 1 does. To me, the OP seemed to be clearly trying to avoid the default chunking behaviour, and since this was accepted I assume I was right. Your answer addresses a slightly different use-case where you want the chunk...
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How to update SQLAlchemy row entry?

... stackoverflow.com/a/2334917/125507 says this is a bad way to do it. Also what if the row doesn't exist yet? – endolith Aug 2 '14 at 18:13 7 ...
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How do I escape ampersands in batch files?

... What about plus sign + what should I put in front to escape it? – william Mar 1 '12 at 3:40 ...
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Setting dynamic scope variables in AngularJs - scope.

...ave a string I have gotten from a routeParam or a directive attribute or whatever, and I want to create a variable on the scope based on this. So: ...