Create tape_equilibrium.rb

Author: rehan-akmal

tape_equilibrium.rb

@@ -0,0 +1,12 @@
+def solution(a)
+  sum_left = 0
+  sum_right = a.inject(:+)
+  minimal_diff = nil
+  (a.length-1).times do |index|
+    sum_left += a[index]
+    sum_right -= a[index]
+    diff = (sum_left - sum_right).abs
+    minimal_diff = diff if minimal_diff.nil? || diff < minimal_diff
+  end
+  minimal_diff
+end