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PostgreSQL query to list all table names?
...bases
SELECT table_schema,table_name FROM information_schema.tables
ORDER BY table_schema,table_name;
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How do you get the index of the current iteration of a foreach loop?
...is for iterating over collections that implement IEnumerable. It does this by calling GetEnumerator on the collection, which will return an Enumerator.
This Enumerator has a method and a property:
MoveNext()
Current
Current returns the object that Enumerator is currently on, MoveNext updates Curre...
fork() branches more than expected?
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when i=0
Process_1: Buffered text= 1 dot
Process_2(created by Process_1): Buffered text= 1 dot
when i=1
Process_3(created by Process_1): Inherit 1 buffered dot from Process_1 and prints 1 dot by itself. In total Process_3 prints 2 dots.
Process_4(created by Process_2): Inherit 1 b...
Showing data values on stacked bar chart in ggplot2
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From ggplot 2.2.0 labels can easily be stacked by using position = position_stack(vjust = 0.5) in geom_text.
ggplot(Data, aes(x = Year, y = Frequency, fill = Category, label = Frequency)) +
geom_bar(stat = "identity") +
geom_text(size = 3, position = position_stack(v...
What is the real overhead of try/catch in C#?
...an exception is thrown or not!
It disables some automatic optimisations (by design), and in some cases injects debugging code, as you can expect from a debugging aid. There will always be people who disagree with me on this point, but the language requires it and the disassembly shows it so those ...
Set selected index of an Android RadioGroup
...he answer below if you are, in fact, looking to set the radio button group by index, see the answer below.
((RadioButton)radioGroup.getChildAt(index)).setChecked(true);
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Why should the “PIMPL” idiom be used? [duplicate]
...rivate: cat_->Purr(); Purr() is not accessible from the outside because by deafult it's private. What am I missing here?
– binaryguy
Aug 14 '15 at 9:20
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Why is volatile not considered useful in multithreaded C or C++ programming?
...when the barrier is reached, so it effectively gives us everything we need by itself, making volatile unnecessary. We can just remove the volatile qualifier entirely.
Since C++11, atomic variables (std::atomic<T>) give us all of the relevant guarantees.
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String.equals versus == [duplicate]
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@mo: It isn't equally handled, as you can see by this example.
– user unknown
May 16 '12 at 14:37
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Update data in ListFragment as part of ViewPager
...ents. The ViewPager is on a vertical phone screen, the lists are not side-by-side.
10 Answers
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