Twig & Html concatenation

Question

I'm looking for a way to get some id like :

first_1 / first_2 / etc etc

But currently i'm doing wrong

{% set nb = 0 %} {% for resultat in resultats %} {% if resultat.first == 1 %} {% set nb=nb+1 %} <tr id="first_"{{ nb }}>

This is giving id="first_" and an other param "1"=""

Thanks for your help

A little bit of research would have helped you : how to concatenate in twig — t-n-y
– t-n-y, Commented Aug 9, 2017 at 8:28

Hitmands · Accepted Answer · 2017-08-09 08:37:03Z

You have:

{{ "first_#{loop.index0}" }}

you don't need to manually create the incrementer.

JGrinon · Accepted Answer · 2017-08-09 08:32:26Z

1

You can concat string:

{% set nb = 0 %} <tr id="first_{{ nb }}">

answered Aug 9, 2017 at 8:32

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Comments

Mickaël Leger · Accepted Answer · 2017-08-09 15:16:26Z

You can concat string in Twig with "~" (same as "." in php and "+" in javascript)

 <tr id="{{ 'first_' ~ nb }}">