I ran into a bug where i left out a space like this
@entries = [#<Entry id: 3806, approved: false, submitted: false]
@entries.any?&:submitted? => true
@entries.any? &:submitted? => false
how does the space change the behavior. Entry.submitted? => false for all the elements in the array, the second line has the desired behavior.
The problem is that & is also a Unary Operator that has a precedence.
When you do this:
@entries.any?&:submitted?
You are actually doing is this:
(@entries.any?)&(:submitted?)
Which results in true. Since there are entries in @entries and the symbol :submitted? has a truth value of true.
When you do this:
@entries.any? &:submitted?
What you are actually doing is this:
@entries.any?(&:submitted?)
Which is what you really want.
The reason @pilcrow got his to work is that he/she was using the following class:
class Entry
def submitted?
true
end
end
To reproduce the result, use the following class:
class Entry
def submitted?
false
end
end
P.S: Same thing with @fl00r's example:
[1,2,nil].any?&:nil? and [1,2,nil].any? &:nil?
[1,2,nil].any? results in true and :nil? has a truth value of true, so the results are the same since [1,2,nil] also contains a nil value, but the calculations are different.
class Entry; def submitted?; true end end. Can we see the smallest possible code you have that reproduces the issue?[1,2,nil].any?&:nil?and[1,2,nil].any? &:nil?