Lambda Expressions

Question

Can somebody explain me lambda expressions & what they can be used for. I have googled for it & have a rough idea. most of the examples give c# code. How about lambda ex

Answer 1

el.pescado's answer is right but the example that he provides has an easy work around, using a function pointer. Many uses of lambda functions can't be solved with c's function pointers.

Say you write these functions in c:

int Multiply_1(int x) { return(x*1); }
int Multiply_2(int x) { return(x*2); }
int Multiply_3(int x) { return(x*3); }
int Multiply_4(int x) { return(x*4); }
etcetera, to infinity

Those are all pretty easy to understand. Now assume that you want to write a function that takes y as input and returns a pointer to the function Multiply_y():

(int)(int) *Make_Multiplier(int y) { return(Multiply_y); }

Where "Multiply_y" is a dynamically created function of the form of Multiply_1, Multiply_2, etc. Languages that have first-class lambda functions can do that.