[REBOL] Re: still a rookie
From: johnkenyon:ibm at: 11-Dec-2000 16:44
Hi Giovanni,
Confusing to start with :)
I would recommend making regular use of the built-in help function.
>> myname: [giovanni cardona iguina]
>> uno: 1
>> myname: skip myname -uno <-doesnt work
>> myname: skip myname -1 <-it works. but I want this on a variable
>> help -
USAGE:
value1 - value2
DESCRIPTION:
Returns the second value subtracted from the first.
- is an op value.
ARGUMENTS:
value1 -- (Type: number pair char money date time tuple)
value2 -- (Type: number pair char money date time tuple)
--
so try :
>> myname: skip myname (- uno)
or
>> myname: skip myname negate uno
Example 2;
>> LE: length? myname
>> print myname/LE <-doesnt work
>> print myname/3 <-this path works, but I want this on a variable
try :
>> print myname/:LE
Also I noticed that if I set myname to the last value: Exactly
>> ? last
USAGE:
LAST series
DESCRIPTION:
Returns the last value of a series.
LAST is an action value.
ARGUMENTS:
series -- (Type: series port tuple)
--
>> myname: last myname
This has set myname to the last _value_ in the series
Try tail:
>> ? tail
USAGE:
TAIL series
DESCRIPTION:
Returns the series at the position after the last value.
TAIL is an action value.
ARGUMENTS:
series -- (Type: series port)
--
myname: tail myname
and then insert a new name:
>> insert myname 'bonano
== []
>> myname: head myname
== [giovanni cardona iguina bonano]
Hope this helps a little.
Regards,
John
