最喜欢的非python语言技巧? [英] Favorite non-python language trick?

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问题描述

作为第一次学习C的人,当我每次来到Python时,我都会读到关于一个新功能的b $ b,哇!我能做到吗?!切片,dir(),

getattr / setattr,%运算符,所有这些都与C非常不同。


我很好奇 - 什么是非python

语言中每个人最喜欢的技巧?而且 - 为什么不是用Python?


这是我现在的候选人:


所以前几天我是看着语言Lua。在Lua中,你用两个破折号做一个

行评论:


- 嘿,这是评论。


您可以使用 - [[和---]]来阻止评论。


- [[


这个



a



评论

- - ]]


这个语法可以让你做一个漂亮的技巧,你可以添加或减去

第三个破折号来改变代码是否运行: br />

- 这段代码不会运行因为它在评论栏中

- [[

打印(10)

- ]]


- 这个代码会,因为前两个短划线会让其余的一个评论,

打破街区

--- [[

打印(10)

- ]]


所以你可以通过添加

破折号来改变代码是否被注释掉。这比在C或Python中不得不摆脱"更好。或

/ *和* /。当然,IDE可以补偿。但它仍然很整洁:)

As someone who learned C first, when I came to Python everytime I read
about a new feature it was like, "Whoa! I can do that?!" Slicing, dir(),
getattr/setattr, the % operator, all of this was very different from C.

I''m curious -- what is everyone''s favorite trick from a non-python
language? And -- why isn''t it in Python?

Here''s my current candidate:

So the other day I was looking at the language Lua. In Lua, you make a
line a comment with two dashes:

-- hey, this is a comment.

And you can do block comments with --[[ and ---]].

--[[
hey
this
is
a
big
comment
--]]

This syntax lets you do a nifty trick, where you can add or subtract a
third dash to change whether or not code runs:

--This code won''t run because it''s in a comment block
--[[
print(10)
--]]

--This code will, because the first two dashes make the rest a comment,
breaking the block
---[[
print(10)
--]]

So you can change whether or not code is commented out just by adding a
dash. This is much nicer than in C or Python having to get rid of """ or
/* and */. Of course, the IDE can compensate. But it''s still neat :)

推荐答案

" Joseph Garvin" < K0 ***** @ kzoo.edu> ha scritto nel messaggio

新闻:ma ********************************* *** @ pyth on.org ...
"Joseph Garvin" <k0*****@kzoo.edu> ha scritto nel messaggio
news:ma**************************************@pyth on.org...
- 这段代码不会运行,因为它在评论栏中
- [[
打印(10)
- ]]

- 这个代码会,因为前两个破折号使剩下的一个评论,
打破了这个区块
--- [[
print(10)
- ]]

所以你可以通过添加一个
破折号来改变代码是否被注释掉。这比在C或Python中不得不摆脱"更好。或
/ *和* /。当然,IDE可以补偿。但它仍然很整洁:)
--This code won''t run because it''s in a comment block
--[[
print(10)
--]]

--This code will, because the first two dashes make the rest a comment,
breaking the block
---[[
print(10)
--]]

So you can change whether or not code is commented out just by adding a
dash. This is much nicer than in C or Python having to get rid of """ or
/* and */. Of course, the IDE can compensate. But it''s still neat :)




python:


"""

打印10

""





#""" ;

打印10

#"""


C ++:


/ *

打印(10);

* /





/// *

print(10);

// * /





再见,

Enrico



python:

"""
print 10
"""

and

#"""
print 10
#"""

C++:

/*
print(10);
*/

and

///*
print(10);
//*/

?

Bye,
Enrico


2005年6月24日星期五上午09:18 Enrico写道:

[...]
Friday 24 June 2005 09:18 am Enrico wrote:

[...]
- 这个代码会,因为前两个破折号会使其余部分成为评论,
打破障碍
--- [[
print(10)
- ]]
--This code will, because the first two dashes make the rest a comment,
breaking the block
---[[
print(10)
--]]


[...]

python:

"""
打印10
"""



#""
print 10
#"""

C ++:

/ *
print(10);
* /



// / *
print(10);
// * /

[...]
python:

"""
print 10
"""

and

#"""
print 10
#"""

C++:

/*
print(10);
*/

and

///*
print(10);
//*/

?




我认为*技巧*这里是如果你有更大的块你只需要

来改变评论的一边,即开头行,取消评论

块而不用搜索结尾并评论出来。


Ciao

Uwe



I think the *trick* here was that if you had larger blocks you''d only have
to change one side of the comment, i.e. the opening line, to de-comment the
block without searching the end of it and commenting that out aswell.

Ciao
Uwe


Joseph Garvin写道:
Joseph Garvin wrote:
我很好奇 - 从非python语言中,每个人最喜欢的技巧是什么?而且 - 为什么不是用Python?
I''m curious -- what is everyone''s favorite trick from a non-python
language? And -- why isn''t it in Python?




Duff'的设备是横向思维的经典杰作。

It由于许多基本原因,Python无法实现,我们不会有风险。


Lorenzo Gatti



Duff''s device is a classic masterpiece of lateral thinking.
It is not possible in Python for many fundamental reasons, we are not
at risk.

Lorenzo Gatti


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