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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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| deoac | my $foo = 1; BEGIN { say $foo; } | 03:52 | |
| #OUTPUT: (Any) | |||
| Why? | |||
| kjp | Because the "$foo = 1" isn't executed until run time, and the code in the BEGIN block is run at compile time. | 03:59 | |
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| deoac | Yet, `say $food` throws an error, not (Any). So BEGIN knows about $foo. | 04:59 | |
| And `sub foo {say 'Hello'}; BEGIN { foo; };` prints `Hello` | 05:01 | ||
| so why isn't the assignment recognized? | |||
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| Nemokosch | I think the reasoning by kjp was legit | 06:41 | |
| m: constant $foo = 1; BEGIN { say $foo; } # constant is evaluated at compile time | 06:43 | ||
| Just because something is visually one line, it doesn't necessarily mean it is executed all at once, confer Javascript `var`s... | 06:45 | ||
| m: BEGIN { say $foo; }; my $foo = 1; | |||
| by the way, your subroutine example doesn't work for me | 06:47 | ||
| m: sub foo {say 'Hello'}; BEGIN { foo; }; | |||
| lizmat | deoc: only the assignment is runtime, the declaration of $foo is also compile time | ||
| Nemokosch | I can imagine this depends on the way of compilation; it definitely doesn't work for me with `raku -e` | ||
| lizmat | that's why the $foo is known inside the BEGIN | 06:48 | |
| Nemokosch | I think it's good to clarify that BEGIN is not something you often need. Ironically, it's not a beginner thing | 06:51 | |
| m: my \foo = 1; BEGIN { say foo; } | 07:03 | ||
| lizmat | m: my \foo = 1; BEGIN { say foo; } | 07:06 | |
| camelia | (Mu) | ||
| lizmat | the reason that shows Mu is that when you declare a variable, it gets declared with a Scalar container already in it | 07:07 | |
| Nemokosch | I was curious about terms because they are bound at declaration | 07:10 | |
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