The first filter returns the first "element" of a sequence, a mapping, or a string:
{{ [1, 2, 3, 4]|first }}
{# outputs 1 #}
{{ { a: 1, b: 2, c: 3, d: 4 }|first }}
{# outputs 1 #}
{{ '1234'|first }}
{# outputs 1 #}
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A number can be written in reverse order. For example 12345 = 54321 <?php $ num = 23456; $ revnum = 0; while ($ num > 1) { $...
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