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This channel is intended for people just starting with the Raku Programming Language (raku.org). Logs are available at irclogs.raku.org/raku-beginner/live.html Set by lizmat on 8 June 2022. |
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| habere-et-disper | So assuming I have an array and it might be empty, then does this seem reasonable : | 00:04 | |
| m: say <foo bar>.Hash{ [].pop // False } | |||
| camelia | (Any) | ||
| nemokosch | not an easy reading - why are you indexing the Hash with literally False? | 00:05 | |
| habere-et-disper | I don't want to. I just want to handle the case when the array might be empty: | 00:09 | |
| m: say <foo bar>.Hash{ [].pop } | 00:10 | ||
| camelia | Cannot pop from an empty Array in block <unit> at <tmp> line 1 |
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| nemokosch | that's the best I can think of | 00:12 | |
| habere-et-disper | Thanks ! | 00:14 | |
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| jgaz | Is is possible to define a signature that expects to return one of TWO possible types? Example: An Int (usually) or a NaN (given some failure)? | 15:10 | |
| nemokosch | via runtime checks yes but not as a dedicated metamodel feature | 15:19 | |
| jgaz | ok | 15:38 | |
| lizmat | m: subset A where * ~~ Int | NaN; sub a($a --> A) { $a }; a 42; a NaN; a pi | 15:39 | |
| camelia | Type check failed for return value; expected A but got Num (3.141592653589793e0) in sub a at <tmp> line 1 in block <unit> at <tmp> line 1 |
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| lizmat | you can hide the runtime check on a subset though | ||
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