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dynamically add and remove view to viewpager
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278
After figuring out which ViewPager methods are called by ViewPager and which are for other pur...
mongodb group values by multiple fields
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TLDR Summary
In modern MongoDB releases you can brute force this with $slice just off the bas...
Scala @ operator
...variable. Consider the following, for instance:
val o: Option[Int] = Some(2)
You can easily extract the content:
o match {
case Some(x) => println(x)
case None =>
}
But what if you wanted not the content of Some, but the option itself? That would be accomplished with this:
o match {...
Move an array element from one array position to another
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How can I remove a specific item from an array?
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12484
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Sort a list by multiple attributes?
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824
A key can be a function that returns a tuple:
s = sorted(s, key = lambda x: (x[1], x[2]))
Or...
How to read a large file - line by line?
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1288
The correct, fully Pythonic way to read a file is the following:
with open(...) as f:
for...
How to reverse a singly linked list using only two pointers?
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How can I get a list of locally installed Python modules?
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Solutio...
Why does the indexing start with zero in 'C'?
...be denoted as array[0].
For more info:
http://developeronline.blogspot.com/2008/04/why-array-index-should-start-from-0.html
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