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What are the Ruby Gotchas a newbie should be warned about? [closed]
...age. But I was quite surprised to see that it was not as simple as I had expected. More precisely, the "rule of least-surprise" did not seem very respected to me (of course this is quite subjective). For example:
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Calling virtual functions inside constructors
...detail. I suggest reading that (and the rest of the FAQ) for a followup.
Excerpt:
[...] In a constructor, the virtual call mechanism is disabled because overriding from derived classes hasn’t yet happened. Objects are constructed from the base up, “base before derived”.
[...]
Destruction is ...
What is the difference between char array and char pointer in C?
...all cases. This is because arrays decay into pointers, meaning that if an expression of type char[] is provided where one of type char* is expected, the compiler automatically converts the array into a pointer to its first element.
Your example function printSomething expects a pointer, so if you t...
Should import statements always be at the top of a module?
...e __init__.py of a plugin, which might be imported but not actually used. Examples are Bazaar plugins, which use bzrlib's lazy-loading framework.
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How to find all the subclasses of a class given its name?
....Bing'>}
Note that if the class definition of a subclass hasn't been executed yet - for example, if the subclass's module hasn't been imported yet - then that subclass doesn't exist yet, and __subclasses__ won't find it.
You mentioned "given its name". Since Python classes are first-class ob...
What are forward declarations in C++?
...file the linker is joining with the one that uses add to produce a dll or exe. It's possible that the linker may get the wrong add. Say you wanted to use int add(int a, float b), but accidentally forgot to write it, but the linker found an already existing int add(int a, int b) and thought that was ...
How do I use the nohup command without getting nohup.out?
...&1 & # runs in background, still doesn't create nohup.out
On Linux, running a job with nohup automatically closes its input as well. On other systems, notably BSD and macOS, that is not the case, so when running in the background, you might want to close input manually. While closing inpu...
Selecting a row in DataGridView programmatically
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Not tested, but I think you can do the following:
dataGrid.Rows[index].Selected = true;
or you could do the following (but again: not tested):
dataGrid.SelectedRows.Clear();
foreach(DataGridViewRow row in dataGrid.Rows)
{
if(YOUR CONDITION)
row.Selected = true;
}
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Eclipse Android Plugin — libncurses.so.5
...re some 32bit shared libraries,
I had same issue on Ubuntu 64 bits, and fixed with:
$ sudo apt-get install ia32-libs
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How to get VM arguments from inside of Java application?
I need to check if some option that can be passed to JVM is explicitly set or has its default value.
5 Answers
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