Hi All,
So, I've been doing some experimentation in order to better understand
the reader, and I can't figure out why I get the following results for
these four calls:
= ('foo); ((quote foo))
java.lang.IllegalArgumentException: Wrong number of args (0) passed
to: Symbol
If I could hazard a guess, it has to do with symbol lookup in maps.
Try the following:
('foo {'foo 1})
('foo {'bloo 1} 4)
when you do ('foo 1), it can't find foo in 1 (because it isn't there,
and 1 isn't even a map), so it returns nil. If you do ('foo 1 2),
you've just provided a default
I'm not 100% sure but this is a side effect of the property that symbols
can be used as functions that find themselves on maps.
For instance:
(def m {'a 1 'b 2 'c 3})
('a m)
;= 1
('b m)
;= 2
and, when the symbols is not found, we have:
('d m)
;= nilurn
('d m :nono)
;= :nono
So a symbol is a
On Tue, Jan 3, 2012 at 2:11 PM, JuanManuel Gimeno Illa
jmgim...@gmail.com wrote:
I'm not 100% sure but this is a side effect of the property that symbols can
be used as functions that find themselves on maps.
Thanks Juan Manuel - that's the thing I was missing (and thanks for
the source link).
