Question

What I have is a dynamically created list thats built off a “each” loop. Where every variable it tacks on it also adds “,” to that string, basically making a CSV style list. What I want to do is remove the last character. Because at the end of the run through the loop there is the extra “,” at the end.

I am trying to find the equivalent to this from PHP

echo substr($str,0,($len-1));

based on the Rails For PHP site it says do something like

puts @avaliable_list.slice(0, 1)

and

puts @avaliable_list[0, 1]

which either rails version leaves me with only the very first character of the string, does not remove the last piece like I want it to. The Rails for PHP site would have me believe that 0 represents the end of the string, and the 1 would be the total char’s I want to remove from said string. Instead it does the opposite.

Answer 1

You should join the array instead of using each.

ruby-1.9.3-p0 :003 > [1,2,3,4].join(',')
=> "1,2,3,4"