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Get the first item from an iterable that matches a condition
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In Python 2.6 or newer:
If you want StopIteration to be raised if no matching element is found:
next(x for x in the_iterable if x > 3)
If you want default_value (e.g. None) to be returned instead:
next((x for x in the_iterable ...
How to convert an integer to a string in any base?
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27 Answers
27
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Calculate distance between two points in google maps V3
... two markers in Google maps V3? (Similar to the distanceFrom function inV2.)
15 Answers
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cpuid汇编指令 - C/C++ - 清泛网 - 专注C/C++及内核技术
...86家族CPU都有这个指令我也不是很清楚，但在EFLAGS中的bit 21可以识别CPU是否支持CPUID指令，如下图：
图1
在8086和8088CPU中，FLAGS只有16位长，在80386CPU中，bit 21被保留未用，在支持CPUID指令的CPU中，这一位将为1。
2、CP...
What is “entropy and information gain”?
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Ashley 1 3 6 f
Brian 0 2 5 m
Caroline 1 4 8 f
David 0 2 5 m
The goal is to build a decision tree. An example of a tree would be:
length<7
| num-vowels<3: mal...
Drawing Isometric game worlds
What is the correct way to draw isometric tiles in a 2D game?
6 Answers
6
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Meaning of numbers in “col-md-4”,“ col-xs-1”, “col-lg-2” in Bootstrap
...sm, md, lg) for now, I'll start with just the numbers...
the numbers (1-12) represent a portion of the total width of any div
all divs are divided into 12 columns
so, col-*-6 spans 6 of 12 columns (half the width), col-*-12 spans 12 of 12 columns (the entire width), etc
So, if you want two equal...
What is the most pythonic way to check if an object is a number?
...ber from the numbers module to test isinstance(n, Number) (available since 2.6).
>>> from numbers import Number
... from decimal import Decimal
... from fractions import Fraction
... for n in [2, 2.0, Decimal('2.0'), complex(2, 0), Fraction(2, 1), '2']:
... print(f'{n!r:>14} {isinst...
Why are floating point numbers inaccurate?
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In most programming languages, floating point numbers are represented a lot like scientific no...