When I last looked at this I found: plus a+b: addition Example: 1+2 -> 3 from a{b: selects the a-th element from b Example: 3{4,5,6,7,8 -> 7 find a~b:

When I last looked at this I found: plus a+b: addition Example: 1+2 -> 3 from a{b: selects the a-th element from b Example: 3{4,5,6,7,8 -> 7 find a~b: Not implemented? Or maybe this exploits some old-style C behavior? rsh a#b: repeat a items of b Example: 3#9 -> [9,9,9] Example: 7#2,3 -> [2,3,2,3,2,3,2] cat a,b: concatenate item a onto the list b Example: 1,2,3 -> [1,2,3] id +a: identity Example: +7 -> 7 size {a: get the size (in the first dimension) of a Example: {7,8,9 -> 3 Example: a=4,5 b=a#7 {b -> 4 iota ~a: enumerates all integers from 0 to a-1 Example: ~3 -> 0,1,2 Example: ~2,3 -> [0,1,2,3,4,5] box <a: Put a into an indirection box Example: <1 -> <1 sha #a: get the shape (size in all dimensions) of a Example: #7,8,9 -> 3 Example: a=4,5 b=a#7 #b -> 4,5 I don't remember or haven't figured out how to dereference a boxed value, or what this can be used for. The struct A has members: t: The "type": 0=integer, 1=boxed reference r: The "rank": size of array d d: The "dimensions": Multiply to get the size of array p p: The actual data. Can be integers or pointers to boxed data (cast to a 32-bit integer!)