String#[]= should support negative position; close #2707

2026-06-08 16:11:16 +00:00 · 2015-01-19 22:13:34 +09:00
parent d764632f86
commit 8aba34301b
1 changed files with 3 additions and 0 deletions
@@ -129,6 +129,9 @@ class String
  # Modify +self+ by replacing the content of +self+
  # at the position +pos+ with +value+.
  def []=(pos, value)
+    if pos < 0
+      pos += self.length
+    end
    b = self[0, pos]
    a = self[pos+1..-1]
    self.replace([b, value, a].join(''))