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[REBOL] Re: Clunky-looking code

From: gjones05:mail:orion at: 7-Apr-2001 10:01

From: "Harold Grovesteen"
> Can someone explain exactly what this code is doing? I'm confused by > this usage of ":" and its relationship to a block. > [Sanghabum--aol--com] wrote: > > > Thanks Renaud, > > > > <Renaud> > > MultiplyBlocks: func [ > > Block1 Block2 > > /local sum > > ][ > > sum: 0 > > repeat i min length? Block1 length? Block2 [ > > sum: sum + (Block1/:i * Block2/:i) > > ] > > return sum > > ] > > </Renaud>
Hi, Harold, Using the colon before a word retrieves its value. In the case where it is used as a part of a path, then the value serves as an index. A different example: a: [cat dog] :a ;returns the value of the word a, which is the block a/1 ;returns cat i: 1 a/:i ;returns cat Hope this helps. --Scott Jones