Is there a way to refer to the arguments passed to a function, so I can
avoid re-stating the argument inside it like the example below?
puts “this is a test”[4…“this is a test”.length]
Sard A. wrote:
Is there a way to refer to the arguments passed to a function, so I can
avoid re-stating the argument inside it like the example below?puts “this is a test”[4…“this is a test”.length]
In your particular case, it can be restated as:
puts “this is a test”[4…-1]
Where the -1 refers to the end of the string.
In general, if you have a long expression you wish to refer to twice,
you can
(1) make a local variable:
s = “this is a test”
puts s[4…s.length]
or (2) make a method
def s
“this is a test”
end
…
puts s[4…s.length]
I’m not sure how your example relates to function arguments … but is
this helpfull?
– Jim W.
Jim W. wrote:
In your particular case, it can be restated as:
puts “this is a test”[4…-1]
Where the -1 refers to the end of the string.
I’m not sure how your example relates to function arguments … but is
this helpfull?– Jim W.
Ah yes, -1 is the most obvious way of to get the end reference.
I was just wondering if there was some sort of reflective way of getting
a reference to the “this is a test” string from with the [] method.
Thanks.
Sard A. wrote:
Jim W. wrote:
In your particular case, it can be restated as:
puts “this is a test”[4…-1]
Where the -1 refers to the end of the string.
I’m not sure how your example relates to function arguments … but is
this helpfull?– Jim W.
Ah yes, -1 is the most obvious way of to get the end reference.
I was just wondering if there was some sort of reflective way of getting
a reference to the “this is a test” string from with the [] method.
No, unless you create one. You could conceivably do this
by some extremely evil use of method rerouting, local_variables
and such nefarities.
Just using variable is your best option, though 
Thanks.
On 10/08/06, Sard A. [email protected] wrote:
Is there a way to refer to the arguments passed to a function, so I can
avoid re-stating the argument inside it like the example below?puts “this is a test”[4…“this is a test”.length]
In this case, it’s unnecessary:
“this is a test”[4…-1]
Paul
On 10/08/06, Sard A. [email protected] wrote:
Is there a way to refer to the arguments passed to a function, so I can
avoid re-stating the argument inside it like the example below?puts “this is a test”[4…“this is a test”.length]
–
Posted via http://www.ruby-forum.com/.
Is there a reason you can’t put it in a varialbe beforehand?
string = “this is a test”
puts string[4…string.length]
Farrel
But one general method of avoiding assignment or restatement is
instance_eval
“this is a test”.instance_eval {self[4…self.length]}
ben
On 8/10/06, Sard A. [email protected] wrote:
– Jim W.
Ah yes, -1 is the most obvious way of to get the end reference.
I was just wondering if there was some sort of reflective way of getting
a reference to the “this is a test” string from with the [] method.
Are you looking for something like this?
class String
def your_method
self[4…self.length]
end
end
“this is a test”.your_method
=> " is a test"
Thanks.
–
Posted via http://www.ruby-forum.com/.
Michael G.