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![]() `List.find : List elem, (elem -> Bool) -> Result elem [ NotFound ]*` behaves as follows: ``` >>> List.find [1, 2, 3] (\n -> n > 2) Ok 2 >>> List.find [1, 2, 3] (\n -> n > 4) Err NotFound ``` We implement this as builtin in two phases. First, we call out to a pure-llvm-lowlevel `ListFindUnsafe` that returns a record indicating whether a satisfying element was found, and the value of that element (the value is all null bytes if the element wasn't found). Then, we lift that record to a `Result` via a standard construction of the can AST. Closes #1909 |
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Bool.roc | ||
Dict.roc | ||
List.roc | ||
Num.roc | ||
Result.roc | ||
Set.roc | ||
Str.roc |