Arc Forumnew | comments | leaders | submitlogin
8 points by pg 2354 days ago | link | parent

Hmm, yes, so would I. I should fix that. I just did what Emmett suggested, which must have been based on Ruby, but it doesn't actually seem like a good idea.


5 points by pg 2353 days ago | link

Fixed. http://arclanguage.org/item?id=2304

-----

4 points by nex3 2354 days ago | link

Given this, I've changed it to 0-based reverse indexing in the Anarki.

-----

3 points by jules 2353 days ago | link

In Ruby you use Ranges for this.

    (1..4).to_a => [1,2,3,4]
    (1...4).to_a => [1,2,3]
str[a..b] is a substring from a to b, inclusive.

str[a...b] is a substring from a to b, exclusive.

With negative indices:

    str[a..-b] == str[a..str.length-b]
    "abcde"[1..-1] == "abcde"[1..5-1] == "abcde"[1..4] == "bcde"

    str[a...-b] == str[a...str.length-b]
    "abcde"[1...-1] == "bcd"

-----

1 point by carpal 2353 days ago | link

How else would you specify "the end of the string"? -1 seems natural for me. Anything else (0?) makes it kind of foggy.

-----

5 points by nex3 2353 days ago | link

"End of string" is specified by not passing a fourth parameter:

  > (cut "abcde" 1)
  "bcde"
See http://arclanguage.org/item?id=2267.

-----

2 points by maxwell 2352 days ago | link

-0

-----