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Why does the order of the loops affect performance when iterating over a 2D array?
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You have a 2-dimensional array, but memory in the computer is inherently 1-dimensional. So while you imagine your array like this:
0,0 | 0,1 | 0,2 | 0,3
----+-----+-----+----
1,0 | 1,1 | 1,2 | 1,3
----+-----+-----+----
2,0 | 2,1 | 2,2 | 2,3
Your computer stores it in memory as a single line:
0...
Scala downwards or decreasing for loop?
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scala> 10 to 1 by -1
res1: scala.collection.immutable.Range = Range(10, 9, 8, 7, 6, 5, 4, 3, 2, 1)
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Comparing two NumPy arrays for equality, element-wise
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edited Nov 7 '19 at 8:57
answered May 14 '12 at 9:37
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What's the simplest way to test whether a number is a power of 2 in C++?
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Why does (1 in [1,0] == True) evaluate to False?
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1 Answer
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Why does Math.round(0.49999999999999994) return 1?
...n Java 6 (and presumably earlier), round(x) is implemented as floor(x+0.5).1 This is a specification bug, for precisely this one pathological case.2 Java 7 no longer mandates this broken implementation.3
The problem
0.5+0.49999999999999994 is exactly 1 in double precision:
static void print(do...
jQuery - setting the selected value of a select control via its text description
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Using switch statement with a range of value in each case?
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Why is GHC so large/big?
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It's a bit silly really. Every library that comes with GHC is provided in no less than 4 flav...
What is the difference between map and flatMap and a good use case for each?
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