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count vs length vs size in a collection
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231
Length() tends to refer to contiguous elements - a string has a length for example.
Count() t...
C# vs Java Enum (for those new to C#)
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13 Answers
13
Active
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Javascript reduce on array of objects
...a variable in the next iteration.
Iteration 1: a = {x:1}, b = {x:2}, {x: 3} assigned to a in Iteration 2
Iteration 2: a = {x:3}, b = {x:4}.
The problem with your example is that you're returning a number literal.
function (a, b) {
return a.x + b.x; // returns number literal
}
Iteration 1: ...
Tools to get a pictorial function call graph of code [closed]
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jacknad
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answered Feb 5 '09 at 20:34
philantphilant
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Removing duplicates in lists
...ample should cover whatever you are trying to do:
>>> t = [1, 2, 3, 1, 2, 5, 6, 7, 8]
>>> t
[1, 2, 3, 1, 2, 5, 6, 7, 8]
>>> list(set(t))
[1, 2, 3, 5, 6, 7, 8]
>>> s = [1, 2, 3]
>>> list(set(t) - set(s))
[8, 5, 6, 7]
As you can see from the example resu...
Making heatmap from pandas DataFrame
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83
You want matplotlib.pcolor:
import numpy as np
from pandas import DataFrame
import matplotlib.p...
Delete files older than 15 days using PowerShell
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309
The given answers will only delete files (which admittedly is what is in the title of this pos...
Clean ways to write multiple 'for' loops
...ure. If
you need a three dimensional matrix, you define one:
class Matrix3D
{
int x;
int y;
int z;
std::vector<int> myData;
public:
// ...
int& operator()( int i, int j, int k )
{
return myData[ ((i * y) + j) * z + k ];
}
};
Or if you want to in...
Replace multiple characters in one replace call
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edited Jul 4 '15 at 0:36
answered May 16 '13 at 0:11
tc...
Global Git ignore
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Paul Razvan Berg
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answered Sep 7 '11 at 14:21
CB BaileyCB Bailey...