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[REBOL] Re: Passing hash keys to functions

From: premshree:pillai:gma:il at: 29-Dec-2004 3:45

Yeah, I realised that (as posted in the earlier reply) Thanks! On Tue, 28 Dec 2004 14:07:09 -0800 (PST), Tom Conlin <[tomc--darkwing--uoregon--edu]> wrote:
> > Hi Premshree > > if 'select returns a series you can just again 'select form that series > > >> select select hsh "a" 1 > == 2 > > is that what you were wondering? > > (where what you are reffering to as a hash could be any series in rebol) > > >> h1: ["a" [ 123 456 789] "b" ["foo" "bar" "ack"] "c" "whatever"] > >> select select h1 "a" 123 > == 456 > >> select select h1 "b" "bar" > == "ack" > >> select select h1 "c" "e" > == #"v" > > On Wed, 29 Dec 2004, Premshree Pillai wrote: > > > > > On Tue, 28 Dec 2004 16:16:14 EST, [SunandaDH--aol--com] <[SunandaDH--aol--com]> wrote: > > > > > > Premshree: > > > > > > > I'm trying to write a function that accepts a key as an argument, and > > > > then returns the corresponding value. > > > > > > You might be better off with the keys as strings rather than words: > > > > > > hsh: make hash! ["a" [1 2] "b" [3 4]] > > > > > > The code hardly needs a function: > > > > > > select hsh "b" > > > == [3 4] > > > > Ah, I din't know of the existence of a select. :-| > > > > I'm a bit confused as to how to use it for keys that have values as > > hashes, though. If I have something like: > > > > hsh: make hash! ["a" [1 2] "b" [3 4]] > > > > How do I do something like hsh->"a"->1? > > > > TIA > > > > > > But if you want one: > > > > > > get-val: func [of [hash!] key [string!] > > > ][ > > > return select of key > > > ] > > > > > > get-val hsh "b" > > > == [3 4] > > > > > > Sunanda > > > -- > > > To unsubscribe from the list, just send an email to rebol-request > > > at rebol.com with unsubscribe as the subject. > > > > > > > > > > > > -- > > Premshree Pillai > > http://www.livejournal.com/~premshree > > -- > > To unsubscribe from the list, just send an email to rebol-request > > at rebol.com with unsubscribe as the subject. > > > -- > To unsubscribe from the list, just send an email to rebol-request > at rebol.com with unsubscribe as the subject. >
-- Premshree Pillai http://www.livejournal.com/~premshree