On 19/03/11 14:44, Ajit Deshpande wrote:
I am trying to figure out where lambda functions can be useful. Has
anyone used them in real world?
From my reading so far, I hear people claim that lambda can be a
useful replacement for small functions. Most examples didn't make
much sense to me. Why would anyone use a one liner anonymous function,
if you never plan to use it elsewhere? You would then be implementing
the logic directly in the line, isn't it?. Functions are useful if
they plan to get called multiple times within your code.
For example:
add_one = lambda x: x + 1
In real world, why would I use a lambda for this. I would simply do:
add_one = x + 1
Can you provide some useful use cases for lambda functions?
~ Ajit Deshpande
Here's one from the python docs, reduce takes a function so technically
the programmer only uses it once but the program calls it many times.
Map is another that works similarly. Have a look into functional
programming as that's the branch of computer science those two functions
and lambdas tend to come from I believe.
http://docs.python.org/library/functions.html?highlight=lambda#reduce
HTH,
Adam.
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