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Convert a float64 to an int in Go
How does one convert a float64 to an int in Go? I know the strconv package can be used to convert anything to or from a string, but not between data types where one isn't a string. I know I can use fmt.Sprintf to convert anything to a string, and then strconv it to the data type I need, but th...
What does -1 mean in numpy reshape?
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614
The criterion to satisfy for providing the new shape is that 'The new shape should be compatible...
Python's “in” set operator
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answered Jan 2 '12 at 21:14
Ignacio Vazquez-AbramsIgnacio Vazquez-Abrams
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How do you know when to use fold-left and when to use fold-right?
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4 Answers
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How do you plot bar charts in gnuplot?
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124
Simple bar graph:
set boxwidth 0.5
set style fill solid
plot "data.dat" using 1:3:xtic(2) wit...
How to get subarray from array?
I have var ar = [1, 2, 3, 4, 5] and want some function getSubarray(array, fromIndex, toIndex) , that result of call getSubarray(ar, 1, 3) is new array [2, 3, 4] .
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Best way to find the intersection of multiple sets?
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465
From Python version 2.6 on you can use multiple arguments to set.intersection(), like
u = set...
Efficient way to apply multiple filters to pandas DataFrame or Series
...ite helper functions for this, consider something along these lines:
In [14]: def b(x, col, op, n):
return op(x[col],n)
In [15]: def f(x, *b):
return x[(np.logical_and(*b))]
In [16]: b1 = b(df, 'col1', ge, 1)
In [17]: b2 = b(df, 'col1', le, 1)
In [18]: f(df, b1, b2)
O...
Lua简明教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ua命令后进入lua的shell中执行语句。
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chenhao-air:lua chenhao$ lua
Lua 5.2.2 Copyright (C) 1994-2013 Lua.org, PUC-Rio
> print("Hello, World")
Hello, World
>
也可以把脚本存成一个文件，用如下命令行...
Iterate a list with indexes in Python
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>>> a = [3,4,5,6]
>>> for i, val in enumerate(a):
... print i, val
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0 3
1 4
2 5
3 6
>>>
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