function completionGroupsLoaded()

in shell/jrepl.js [607:648]

• 35 lines of code
• 13 McCabe index (conditional complexity)

  function completionGroupsLoaded(err) {
    if (err) throw err;

    // Filter, sort (within each group), uniq and merge the completion groups.
    if (completionGroups.length && filter) {
      var newCompletionGroups = [];
      for (i = 0; i < completionGroups.length; i++) {
        group = completionGroups[i].filter(function(elem) {
          return elem.indexOf(filter) == 0;
        });
        if (group.length) {
          newCompletionGroups.push(group);
        }
      }
      completionGroups = newCompletionGroups;
    }

    if (completionGroups.length) {
      var uniq = {};  // unique completions across all groups
      completions = [];
      // Completion group 0 is the "closest"
      // (least far up the inheritance chain)
      // so we put its completions last: to be closest in the REPL.
      for (i = completionGroups.length - 1; i >= 0; i--) {
        group = completionGroups[i];
        group.sort();
        for (var j = 0; j < group.length; j++) {
          c = group[j];
          if (!hasOwnProperty(c)) {
            completions.push(c);
            uniq[c] = true;
          }
        }
        completions.push(''); // separator btwn groups
      }
      while (completions.length && completions[completions.length - 1] === '') {
        completions.pop();
      }
    }

    callback(null, [completions || [], completeOn]);
  }