Dear all, Is it possible in Julia to define a C++-like operator() for its "struct-like" composite types (defined with type....end)? Thanks to such a method, one may treat an object as a function.
Here's a GitHub gist illustrating what I'm trying to achieve: https://gist.github.com/gagolews/9206364 In other words, I'd like to create a function which has some associated (deep copied) objects with it, by calling new_function = create_function(data) and such that new_function does not rely on dataanymore (at least from its caller/user perspective). I tried to play with Julia's macros, but I'm quite sure it's not the case here. My inspiration is R's approxfun() which returns a function object that interpolates (linearly) a given set of points in 2D. I'm trying to develop a similar tool in Julia, but I cannot move on because of this issue. > (x <- seq(0, 1, length.out=10)) [1] 0.0000000 0.1111111 0.2222222 0.3333333 0.4444444 0.5555556 0.6666667 [8] 0.7777778 0.8888889 1.0000000 > (y <- x^2) [1] 0.00000000 0.01234568 0.04938272 0.11111111 0.19753086 0.30864198 [7] 0.44444444 0.60493827 0.79012346 1.00000000 > f <- approxfun(x, y) > f(0.35) [1] 0.1240741 > y <- sqrt(x) > f(0.35) # no change (y is stored "within" f) [1] 0.1240741 > # more precisely it is a new environment ("hash table") > # ASSOCIATED with the function > ls(envir=environment(f)) [1] "f" "method" "x" "y" "yleft" "yright" > f # one source code, but operates on different data function (v) .approxfun(x, y, v, method, yleft, yright, f) <bytecode: 0x2ff5fb8> <environment: 0x320a7d0> Anybody? Best regards, Marek Gagolewski http://gagolewski.rexamine.com
