I sing the praises of lambda, my friend and savior!
Clark C. Evans
cce at clarkevans.com
Mon Oct 11 21:16:38 CEST 2004
On Mon, Oct 11, 2004 at 11:58:44AM -0700, Jeff Shannon wrote:
| >If you don't like lambda -- don't use it. Just beacuse you are
| >unfamilar with a very helpful construct and are unwilling to learn
| >does not mean you should prevent others from continuing to enjoy
| >one of the more pleasant aspects of Python.
| Except that one of the design principles of Python is that it being easy
| to *read* is more important than being easy to write
Exactly! Lambdas make my code easy to read and therefore more
understandable. I don't use them beacuse they are easier to write,
I use them beacuse they make reviewing source code easier:
- they put simple expressions that are arguments right
where they are used
- they don't create random names that you have to worry
about name collision or finding something meaningful
(and not distracting)
- you are certain to know that the chunk of code is not
used anywhere else, that is, you can freely modify it
Lambdas are all about making code more maintainable.
| Lambdas are hard to read,
This is _your_ opinion; lots of other people disagree.
| because they're significantly different,
| syntactically, from any other construct in the language
This argument is just bogus. There are lots of things in Python
that are significantly different from each other:
- functions that return functoins, and hence can().be().chained()
- using expressions as function arguments
- list comprehensions
- *args and **kwargs
- overridable operators
- classes, meta-classes
In any of these cases one _could_ of course, find a similar way
to do it with just a turning machine. But this isn't the point,
the point is to give special syntax to common things that have
specific meaning so that they are easily recognized.
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