On 21/06/12 00:27, Mike Nickey wrote:
While i'm still not sure what lamda is or represents,
lambda is a function without a name.
def sort_last(tuples):
# +++your code here+++
print sorted(tuples, key=lamda tuples: tuples[-1])
return
The lamda above is identical to doing:
def f(t):
return t[-1]
print sorted(tuples, key=f)
And in general:
def f(arg):
return expression
can be written:
f = lambda arg: expression
And they are most usually used, as in the case of sorted, where its
convenient to define the function in place rather than having small
functions scattered around which might only be used once.
The term lambda comes from the Lambda calculus which is one of the
underlying mathematical models that programming is based upon. (Along
with state automata theory, Boolean algebra, relational theory etc)
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
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