Fun example: Because "classes" are functions, .filter(Boolean).length is magic for, for example, evaluating composed validation rules.
.filter(Boolean).length
Cool, but I've seen antipatterns like
foo.map(x => check(x) ? bar(x) : null).filter(Boolean)
It's always better to just do this:
foo.filter(check).map(bar)
My next planned article is on .map() 😊
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Fun example: Because "classes" are functions,
.filter(Boolean).lengthis magic for, for example, evaluating composed validation rules.Cool, but I've seen antipatterns like
It's always better to just do this:
My next planned article is on .map() 😊