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Mapping two integers to one, in a unique and deterministic way
...ing the pairing function.
Actually I lied. You are looking for a bijective ZxZ -> N mapping. Cantor's function only works on non-negative numbers. This is not a problem however, because it's easy to define a bijection f : Z -> N, like so:
f(n) = n * 2 if n >= 0
f(n) = -n * 2 - 1 if n <...
Checking if a double (or float) is NaN in C++
...comments below have pointed out, not all compilers respect this when optimizing code.
For any compiler which claims to use IEEE floating point, this trick should work. But I can't guarantee that it will work in practice. Check with your compiler, if in doubt.
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Macro vs Function in C
...Bryan
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answered Feb 1 '12 at 23:02
D CoetzeeD Coetzee
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Python function global variables?
...upitu
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answered May 14 '12 at 17:38
LevonLevon
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What is the difference between “text” and new String(“text”)?
...erString) constructor. From the API:
String(String original) : Initializes a newly created String object so that it represents the same sequence of characters as the argument; in other words, the newly created string is a copy of the argument string. Unless an explicit copy of original is needed...
Freeze the top row for an html table only (Fixed Table Header Scrolling) [duplicate]
I want to make an html table with the top row frozen (so when you scroll down vertically you can always see it).
10 Answer...
Why does the arrow (->) operator in C exist?
...or offset 0, while name b would stand for offset 2 (assuming int type of size 2 and no padding). The language required all members of all structs in the translation unit either have unique names or stand for the same offset value. E.g. in the same translation unit you could additionally declare
str...
Maven: add a dependency to a jar by relative path
...d>
<artifactId>3rdparty</artifactId>
<version>X.Y.Z</version>
</dependency>
This is IMHO a better solution than using a system scope as your dependency will be treated like a good citizen (e.g. it will be included in an assembly and so on).
Now, I have to ment...
How does Hadoop process records split across block boundaries?
...he following info:
For each input file, get the file length, the block size and calculate the split size as max(minSize, min(maxSize, blockSize)) where maxSize corresponds to mapred.max.split.size and minSize is mapred.min.split.size.
Divide the file into different FileSplits based on the split si...
“INSERT IGNORE” vs “INSERT … ON DUPLICATE KEY UPDATE”
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