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Convert a series of parent-child relationships into a hierarchical tree?
I have a bunch of name-parentname pairs, that I'd like to turn into as few heirarchical tree structures as possible. So for example, these could be the pairings:
...
In C++, what is a virtual base class?
...roblem with the Dreaded Diamond is that the base class is present multiple times. So with regular inheritance, you believe you have:
A
/ \
B C
\ /
D
But in the memory layout, you have:
A A
| |
B C
\ /
D
This explain why when call D::foo(), you have an ambiguity problem. But the re...
Why do we have map, fmap and liftM?
...cade after the change @augustss describes was made, and has spent a lot of time helping people who are learning the language now, it's not at all clear that it even helped in any way. Certainly not enough to offset the useless redundancy (which itself leads to people asking questions like this one);...
How to save picture to iPhone photo library?
... I tried saving using ALAssetsLibrary, it takes just the same time to save as UIImageWriteToSavedPhotosAlbum.
– Hlung
May 5 '12 at 10:57
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Exception.Message vs Exception.ToString()
...xceptions.
Any other custom properties added to the exception.
There are times when you want to capture this extra information. The code below handles the above scenarios. It also writes out the properties of the exceptions in a nice order. It's using C# 7 but should be very easy for you to conver...
How to count occurrences of a column value efficiently in SQL?
I have a table of students:
6 Answers
6
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What are the different usecases of PNG vs. GIF vs. JPEG vs. SVG?
...aving the same file over and over will result in more data being lost over time. It has a palette of thousands of colours and so is great for photographs, but the lossy compression means it's bad for logos and line drawings: Not only will they look fuzzy, but such images will also have a larger file...
Is it possible to run one logrotate check manually?
...c/logrotate.d/custom.conf does this mean, you don't need to specify a size/time when the log should automatically rotate? Or should you place the config in a different folder if you do not intend to make it rotate automatically?
– Damainman
Aug 7 '13 at 9:19
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“inconsistent use of tabs and spaces in indentation”
I'm trying to create an application in Python 3.2 and I use tabs all the time for indentation, but even the editor changes some of them into spaces and then print out "inconsistent use of tabs and spaces in indentation" when I try to run the program.
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String comparison in bash. [[: not found
... like you said. normally i call it with '$sh myscipt.sh'. 2nd time after doing chmod +x myscript.sh i called it with ./myscript.sh
– user1581900
Sep 1 '12 at 20:02
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