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First-time database design: am I overengineering? [closed]
...xperience in real world application development. I have written scripts in Python, some coursework in C, but nothing like this.
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XPath to select multiple tags
...well for me. It seems XPath 2.0 is the default for HTML parsing in lxml on Python 2.
– Martin Burch
Feb 8 '16 at 23:51
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How to make node.js require absolute? (instead of relative)
...ance the author made such a rookie mistake? (And I agree, from my Ruby and Python background, it seems at first like a disaster.)
There is a lot of hype and counter-hype surrounding Node.js. But when the dust settles, we will acknowledge that explicit modules and "local first" packages were a major...
What is the AppDelegate for and how do I know when to use it?
...there a rule or any type of analogy with another programming language like Python or PHP that uses an AppDelegate like pattern?
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Differences between Octave and MATLAB? [closed]
I'm a programmer who knows Python, Ruby and some C who is trying to decide whether to learn GNU Octave or Matlab. I know that they have a lot in common , but it isn't clear to me how similar the syntax is or even the data structures are. The above link shows several examples where they are syntacti...
Lua简明教程 - 脚本技术 - 清泛IT论坛，有思想、有深度
...GO语言很类似。print("Hello World")复制代码
你可以像python一样，在命令行上运行lua命令后进入lua的shell中执行语句。chenhao-air:lua chenhao$ lua
Lua 5.2.2 Copyright (C) 1994-2013 Lua.org, PUC-Rio
> print("Hello, World")
Hello, World
&...
Compute a confidence interval from sample data
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Starting Python 3.8, the standard library provides the NormalDist object as part of the statistics module:
from statistics import NormalDist
def confidence_interval(data, confidence=0.95):
dist = NormalDist.from_samples(data)
z ...
How does the new automatic reference counting mechanism work?
... counting was invented in 1960 and has been used in many languages such as Python and Mathematica. It is not used in the JVM or CLR because it is very slow and leaks cycles.
– J D
Jan 25 '14 at 15:08
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Assign pandas dataframe column dtypes
...float32(1), float64(1), int32(1)
memory usage: 205.0 bytes
None
Not very pythonic.... but does the job
Hope it helps.
JC
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How to make rounded percentages add up to 100%
...ow prefers to round up the values on the left.
Putting it all together in Python looks like this.
def error_gen(actual, rounded):
divisor = sqrt(1.0 if actual < 1.0 else actual)
return abs(rounded - actual) ** 2 / divisor
def round_to_100(percents):
if not isclose(sum(percents), 10...