$ cat sort-list.tt2
[% MACRO blocker BLOCK %]
[% FOREACH element IN array.sort('name') %]
[% element.name %]
[%- END -%]
[%- END -%]

[%-
SET array = [
  { name => 'foo', value => 1 },
  { name => 'bar', value => 2 },
  { name => 'baz', value => 3 }
];
blocker
%]

[%-
SET array = [
  { name => 'bar', value => 2 },
];
blocker
%]

$ tpage sort-list.tt2


bar
baz
foo


bar