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Obtaining a powerset of a set in Java
The powerset of {1, 2, 3} is:
26 Answers
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When is SQLiteOpenHelper onCreate() / onUpgrade() run?
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edited Apr 27 at 6:55
community wiki
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What's the most efficient way to test two integer ranges for overlap?
Given two inclusive integer ranges [x1:x2] and [y1:y2], where x1 ≤ x2 and y1 ≤ y2, what is the most efficient way to test whether there is any overlap of the two ranges?
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Overload constructor for Scala's Case Classes?
In Scala 2.8 is there a way to overload constructors of a case class?
2 Answers
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What's valid and what's not in a URI query?
...he current standard for generic URIs is RFC 3986, which has this to say:
2.2. Reserved Characters
URIs include components and subcomponents that are delimited by characters in the "reserved" set. These characters are called "reserved" because they may (or may not) be defined as delimiters by the g...
MySql: Tinyint (2) vs tinyint(1) - what is the difference?
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It means display width
Whether you use tinyint(1) or tinyint(2), it does not make any difference.
I always use tinyint(1) and int(11), I used several mysql clients (navicat, sequel pro).
It does not mean anything AT ALL! I ran a test, all above clients or even the command-line client...
Best way to represent a fraction in Java?
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26 Answers
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What's the cleanest way of applying map() to a dictionary in Swift?
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Swift 4+
Good news! Swift 4 includes a mapValues(_:) method which constructs a copy of a dict...
What's the difference between lists enclosed by square brackets and parentheses in Python?
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Square brackets are lists while parentheses are tuples.
A list is mutable, meaning you can ch...
How can I create a correlation matrix in R?
I have 92 set of data of same type.
5 Answers
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