firstof filter (return the first true value of a list)#42
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Alexis-D wants to merge 2 commits intopallets:masterfrom
Closed
firstof filter (return the first true value of a list)#42Alexis-D wants to merge 2 commits intopallets:masterfrom
Alexis-D wants to merge 2 commits intopallets:masterfrom
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The firstof filter return the first element that is evaluated to True in
a sequence, it return '' if all elements are evaluated to False.
How to use ?
============
{{ ['hello', baz]|firstof }} -> 'hello'
{{ [0, False]|firstof }} -> ''
{{ [0, False, foo]|firstof }} with foo='bar' -> 'bar'
It's inspired by django firstof:
https://docs.djangoproject.com/en/dev/ref/templates/builtins/?from=olddocs#firstof
Contributor
|
In my opinion that use case is not common enough that it is worth to get merged into upstream. A more flexible solution that can satisfy that use case among others, is the {{ [0, False, foo]|filter|first }} |
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The firstof filter return the first element that is evaluated to True in
a sequence, it return '' if all elements are evaluated to False.
How to use ?
{{ ['hello', baz]|firstof }} -> 'hello'
{{ [0, False]|firstof }} -> ''
{{ [0, False, foo]|firstof }} with foo='bar' -> 'bar'
It's inspired by django firstof:
https://docs.djangoproject.com/en/dev/ref/templates/builtins/?from=olddocs#firstof