Function commonPrefix

Node/shell/reader.js:418–436

(types)

    }
    
    function commonPrefix(types) {
      // Sort types, inspect first/last strings.
      types.sort();
      var first = types[0],
          last = types[types.length - 1],
          n = Math.min(first.length, last.length),
          match = '';

      // Find common prefix.
      while (n > 0) {
        last = last.substring(0, n--);
        if (first.indexOf(last) == 0) {
          match = last;
          break;
        }
      }
      
      return match;
    }
    
    var type = 'application/octed-stream';