In the end I did it this way.
def loop_td(func,matrix,grocery,name)
holder = ["<td>" + name + "</td>"]
for x in matrix
holder << ("<td>" + send(func,grocery,x) + "</td>")
end
return holder
end
display_price is the func I want to insert
def display_price(grocery,batch)
grocery_price = grocery.send(batch).price
if grocery_price
number_to_currency(grocery_price)
else
"NA"
end
end
The underlying goal was to make a function where I could automatically
generate a table row that used the same function in each <td> for with the
same array.
-yl(thanks for answering btw)
-----Original Message-----
From: [email protected]
[mailto:[EMAIL PROTECTED] On Behalf Of Pardee, Roy
Sent: Wednesday, October 29, 2008 7:43 PM
To: [email protected]
Subject: [Rails] Re: Passing a function with arguments to another function
with arguments that is a loop
You can create a pointer to your display_price method with a Proc object,
e.g.:
this_func = Proc.new {|groc, bat| display_price(groc, bat)}
loop(this_func, batch)
Your loop method invokes the actual function with the .call method, e.g.:
def loop(func, matrix)
# Note that .each will almost certainly not yield the matrix object
itself.
matrix.each { |matrix_item| func.call(@grocery, matrix) }
end
No clue if that will work for your actual application--trying to figure out
what you might be doing is making my head hurt. ;-) This feels like it's
well outside of noob-land. If you back up & tell us more about your
underlying goals, we may be able to give advice for staying w/more
straightforward processing.
HTH,
-Roy
-----Original Message-----
From: [email protected]
[mailto:[EMAIL PROTECTED] On Behalf Of tyliong
Sent: Tuesday, October 28, 2008 8:17 AM
To: Ruby on Rails: Talk
Subject: [Rails] Passing a function with arguments to another function with
arguments that is a loop
Hi, I am a noobie. I just want to know what is the standard or most
effective way of doing this
I have two functions
def display_price(grocery,batch)
grocery_price = grocery.send(batch).price
if grocery_price
number_to_currency(grocery_price)
else
"NA"
end
end
def loop(func,matrix)
matrix.each { |matrix| display_price(@grocery,matrix) }
end
the "func argument" in the loop function is suppose to be
display_price but how do i put it in if the "batch" is the thing that
I want to be looped through?
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