twighigher-order-functionstwig-filter

How to map scalar twig filter to array

I have a simple array of floats. And I need to show it as comma separated string.

{{ arr|join(', ') }}

is bad solution because of excessive insignificant accuracy.

{% for val in arr %}
    {{val|number_format(2)}},
{% endfor %}

is bad because of extra comma at the end.

I would like to do something like this:

{{ arr|map(number_format(3))|join(', ') }}

but I have not found filter map or similar filter it Twig. Аnd I don't know how to implement such filter.

Solution

  • Quick Answer (TL;DR)

    Detailed Answer

    Context

    Problem

    Example

    {%- set mylist = ['alpha','bravo','charlie','delta','echo']  -%}

BEFORE: 
['alpha','bravo','charlie','delta','echo']

AFTER: 
['Alpha','Bravo','Charlie','Delta','Echo']

    Solution

    {%- set mylist = mylist|map(=> _|capitalize)  -%}

    Pitfalls

    See also