twigfiddle.com - Fiddle rp3nii v1 - Created on August 16, 2019 13:58

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{% set eventTimes = [
    '2019-08-16',
    '2019-08-17',
    '2019-08-18',
    '2019-08-23',
    '2019-08-24',
    '2019-08-25',
]%}

{% set dateRanges = {} %}


{% for eventTime in eventTimes %}
  {% set found = false %}
  {% for key, dateRange in dateRanges %}
    {% if date(eventTime)|date_modify("-1 day")|date("Y-m-d") in dateRange %}
      {% set dateRanges = dateRanges|merge({(key): dateRange|merge([eventTime])}) %}
      {% set found = true %}
    {% endif %}
  {% endfor %}
  {% if found == false %}
    {% set dateRanges = dateRanges|merge({(eventTime): [eventTime]}) %}
  {% endif %}
  {{dateRanges|json_encode()}}
{% endfor %}

{{ dateRanges|json_encode() }}

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Fiddle rp3nii created on August 16, 2019 13:58 and visited 130 times

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