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What are the options for storing hierarchical data in a relational database? [closed]
...ierarchy and use Nested Sets to query the hierarchy.
The problem up until now has been that the coversion method from an Adjacecy List to Nested Sets has been frightfully slow because most people use the extreme RBAR method known as a "Push Stack" to do the conversion and has been considered to be ...
An efficient way to transpose a file in Bash
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And now to handle row and column labels too?
– Jonathan Leffler
Nov 13 '09 at 15:54
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How to clear the cache in NetBeans
...cognized as implementing Throwable... I just deleted the stupid cache, and now all of it works fine.
– Ian Campbell
Sep 20 '13 at 0:59
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MAC addresses in JavaScript
I know that we can get the MAC address of a user via IE (ActiveX objects).
6 Answers
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What are the reasons why Map.get(Object key) is not (fully) generic
... Of course, uses where the compile time type was not a subclass of K would now fail to compile, but that doesn't invalidate the contract, since contracts implicitly discuss what happens if the code compiles.
– BeeOnRope
Jun 2 '16 at 23:09
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How do SQL EXISTS statements work?
...M student WHERE EXISTS (SELECT 1 FROM student WHERE student.id > 1). I know what I wrote could be achieved by one simple WHERE query but I was just using it to understand EXISTS. I got all the rows. Is it indeed due to the fact that I didn't use correlated subquery? Thanks.
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How to select Python version in PyCharm?
......Default Project Structure. There you can set the Project SDK which will now apply on each new project. It can be different on other platforms, but still similar.
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What is the best way to implement constants in Java? [closed]
... big bad hack), because the constructor of the subclass needs to call the (now private) constructor of its superclass. So, marking it final is unnecessary (but perhaps more explicit).
– import this
Nov 4 '14 at 16:56
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How to set up tmux so that it starts up with specified windows opened?
... that.
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| tail |
|----------|
| | top |
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Now I tried to again sub-divide the bottom left pane, so switching either back using last-pane, or in more complex windows, with the select-pane -t 1 where 1 is the number of the pane in order created starting with 0.
tmux n...
Implementing two interfaces in a class with same method. Which interface method is overridden?
... @TassosBassoukos +1 say you have your own implementation of List, now you can myList.stream() it or myList.sort() it without changing your code
– Peter Lawrey
Jun 25 '14 at 6:04
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