Aug 19, 2008 · Lambda calculus codifies the correct way to do these substitutions. Given that y = x−1 is a valid rearrangement of the second equation, this: λ y = x−1 means a function substituting the …

I saw some examples using built-in functions like sorted, sum etc. that use key=lambda. What does lambda mean here? How does it work? For the general computer science concept of a lambda, see …

I was studying lambda function in c++11 recently. But I don't know if there is any difference between [=] and [&]. If there is, what the difference is? And in these two situation, does this in

Here is another really good reference which explains very well what are lambda expressions in C++: Microsoft.com: Lambda expressions in C++. I especially like how well it explains the parts of a …

Mar 8, 2011 · Lambda is more of a concept or programming technique then anything else. Basically it's the idea that you get a function (a first-class object in python) returned as a result of another function …

If I need to generate a lambda that calls a member function. Should I capture by reference or capture this? My understanding is that & captures only the members used, but this captures all data

I don't quite understand the syntax behind the sorted() argument: key=lambda variable: variable[0] Isn't lambda arbitrary? Why is variable stated twice in what looks like a dict?

The closure of a lambda expression is this particular set of symbols defined in the outer context (environment) that give values to the free symbols in this expression, making them non-free …

by_attribute = lambda x: x.attribute == value xs = filter(by_attribute , xs) Yes, that's two lines of code instead of one, but you clean filter expression from cumbersome lambda and by naming lambda …

Lambda functions are most useful in things like callback functions, or places in which you need a throwaway function. JAB's example is perfect - It would be better accompanied by the keyword …