Can someone explain what is wrong with my syntax?

rubyonrails-talk
1

Hey Everyone, I think this should be an easy one, and the solution right now was to use two lines instead of one, but I am curious why this syntax isn't working.

Assignment.find(:all).delete_if {|assignment| assignment.assignment_name == "Lunch" || assignment.assignment_name == "Lunch"}

This will return the array without the "Lunch", but with the break still in tact, so I tried again:

Assignment.find(:all).delete_if {|assignment| assignment.assignment_name == ("Lunch" || "Break")}

Nope! No good, once again, lunch is gone, but break is still in the array.

tried to do the same thing with select as well . . . no dice. I have this working right now with two lines of code, but I am really curious where my syntax is going wrong. More a question of interest then anything else.

Thanks!

2

Hey Everyone, I think this should be an easy one, and the solution right now was to use two lines instead of one, but I am curious why this syntax isn't working.

Assignment.find(:all).delete_if {|assignment| assignment.assignment_name == "Lunch" || assignment.assignment_name == "Lunch"}

This will return the array without the "Lunch", but with the break still in tact, so I tried again:

Assignment.find(:all).delete_if {|assignment| assignment.assignment_name == ("Lunch" || "Break")}

Nope! No good, once again, lunch is gone, but break is still in the array.

That doesn't do what you think it does. First it evaluates ("Lunch" ||
"Break") which evaluates to "Lunch", so that just does

Assignment.find(:all).delete_if {|assignment|
assignment.assignment_name == "Lunch"}

you would need

Assignment.find(:all).delete_if do |assignment|    assignment.assignment_name == "Lunch" || assignment.assignment_name
== "Break" end

or

Assignment.find(:all).delete_if do |assignment|    ["Lunch", "Break"].include? assignment.assignment_name end

Fred