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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
...
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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std::function vs template
...rmance difference between the two
Using clang (3.2, trunk 166872) (-O2 on Linux), the binaries from the two cases are actually identical.
-I'll come back to clang at the end of the post. But first, gcc 4.7.2:
There's already a lot of insight going on, but I want to point out that the result of t...
Can I split an already split hunk with git?
... (git-gui usage):
I am not sure if the git-gui is the same in msysgit and linux versions, I've only used the msysgit one. But assuming it is the same, when you run it, there are four panes: top-left pane is your working directory changes, bottom-left is your stages changes, top-right is the diff fo...
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...
WebSockets protocol vs HTTP
...on/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.17 (KHTML, like Gecko) Chrome/24.0.1312.68 Safari/537.17
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
Cookie: [[[2428 byte of ...
How do you make a web application in Clojure? [closed]
...orld. I never made a web app from scratch in Java. If I have to do it with Python, Ruby, I know where to go (Django or Rails), but if I want to make a web application in Clojure, not because I'm forced to live in a Java world, but because I like the language and I want to give it a try, what librari...
PowerShell: Store Entire Text File Contents in Variable
...ish to include trailing empty line:
[io.file]::ReadAllText(".\desktop\git-python\test.ps1").split("`n").count
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