Replies: 7 comments 4 replies
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You can use lambdas: main:
lambdas := [
:: print "hello",
:: print "world",
]
lambdas.do: | fun/Lambda |
fun.call |
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What if the function body includes multiple lines or actions, not just
print?
…On Tue, Jan 7, 2025, 11:21 Florian Loitsch ***@***.***> wrote:
You can use lambdas:
main:
lambdas := [
:: print "hello",
:: print "world",
]
lambdas.do: | fun/Lambda |
fun.call
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You can either use indentation, or call a function outside. foo x y:
print x
print y
main:
lambdas := [
:: | x y | foo x y, // Call other function.
:: | x y | // Inline with indentation.
print x
print y
]
lambdas.do: | fun/Lambda |
fun.call "hello" "world" |
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I like this better:
a1 -> none :
print "A1"
a2 -> none :
print "A2"
a3 -> none :
print "A3"
main :
lambdas := [
:: a1, :: a2, :: a3
]
lambdas.do : | f/Lambda |
f.call
But in any case thanks a lot!
…On Tue, Jan 7, 2025, 11:28 Florian Loitsch ***@***.***> wrote:
You can either use indentation, or call a function outside.
I also added (as example) parameters to the lambdas.
foo x y:
print x
print y
main:
lambdas := [
:: | x y | foo x y, // Call other function. :: | x y | // Inline with indentation. print x
print y
]
lambdas.do: | fun/Lambda |
fun.call "hello" "world"
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You can also assign the lambdas to local variables first: |
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Ok
…On Tue, Jan 7, 2025, 12:01 Florian Loitsch ***@***.***> wrote:
You can also assign the lambdas to local variables first:
main:
fun1 := :: foo
fun2 := :: bar
...
lambdas := [ fun1, fun2, ... ]
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Will this whole construction work if both functions and lambdas list are
inside some class?
…On Tue, Jan 7, 2025, 12:01 michael sure8 ***@***.***> wrote:
Ok
On Tue, Jan 7, 2025, 12:01 Florian Loitsch ***@***.***>
wrote:
> You can also assign the lambdas to local variables first:
>
> main:
> fun1 := :: foo
> fun2 := :: bar
> ...
> lambdas := [ fun1, fun2, ... ]
>
> —
> Reply to this email directly, view it on GitHub
> <#2689 (reply in thread)>,
> or unsubscribe
> <https://github.com/notifications/unsubscribe-auth/A54VSXO3XLT2ASYWGSWFJS32JOQWPAVCNFSM6AAAAABUXJCJVKVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTCNZVHE2DKMA>
> .
> You are receiving this because you authored the thread.Message ID:
> ***@***.***>
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Yes. |
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I've found inside a class, the vector of lambda functions cannot be used
due initialization error.
```
// define some class
class Some :
ab1 -> none :
print "Ab1"
ab2 -> none :
print "Ab2"
ab3 -> none :
print "Ab3"
list_/List := [
:: ab1, :: ab2, :: ab3
]
done :
list_.do : | fun/Lambda |
fun.call
/*
test_lambdas.toit:15:9: error: Can't access instance members in field
initializers.
:: ab1, :: ab2, :: ab3
^~~
test_lambdas.toit:15:17: error: Can't access instance members in field
initializers.
:: ab1, :: ab2, :: ab3
^~~
test_lambdas.toit:15:25: error: Can't access instance members in field
initializers.
:: ab1, :: ab2, :: ab3
^~~
Compilation failed.
*/
a1 -> none :
print "A1"
a2 -> none :
print "A2"
a3 -> none :
print "A3"
main :
lambdas := [
:: a1, :: a2, :: a3
]
lambdas.do : | fun/Lambda |
fun.call
// Works!
```
…On Tue, Jan 7, 2025, 18:28 Florian Loitsch ***@***.***> wrote:
Yes.
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All works if you rewrite the class as follows:
class Some :
list_/List := []
ab1 -> none :
print "Ab1"
ab2 -> none :
print "Ab2"
ab3 -> none :
print "Ab3"
size :
print "size->$list_.size"
create :
list_.add ::ab1
list_.add ::ab2
list_.add ::ab3
done :
list_.do : | fun/Lambda |
fun.call
main :
some := Some
some.create
some.size
some.done
// Works!
Sorry for the trouble.
…On Wed, Jan 8, 2025, 08:10 michael sure8 ***@***.***> wrote:
I've found inside a class, the vector of lambda functions cannot be used
due initialization error.
// define some class
class Some :
ab1 -> none :
print "Ab1"
ab2 -> none :
print "Ab2"
ab3 -> none :
print "Ab3"
list_/List := [
:: ab1, :: ab2, :: ab3
]
done :
list_.do : | fun/Lambda |
fun.call
/*
test_lambdas.toit:15:9: error: Can't access instance members in field
initializers.
:: ab1, :: ab2, :: ab3
^~~
test_lambdas.toit:15:17: error: Can't access instance members in field
initializers.
:: ab1, :: ab2, :: ab3
^~~
test_lambdas.toit:15:25: error: Can't access instance members in field
initializers.
:: ab1, :: ab2, :: ab3
^~~
Compilation failed.
*/
a1 -> none :
print "A1"
a2 -> none :
print "A2"
a3 -> none :
print "A3"
main :
lambdas := [
:: a1, :: a2, :: a3
]
lambdas.do : | fun/Lambda |
fun.call
// Works!
On Tue, Jan 7, 2025, 18:28 Florian Loitsch ***@***.***>
wrote:
> Yes.
>
> —
> Reply to this email directly, view it on GitHub
> <#2689 (reply in thread)>,
> or unsubscribe
> <https://github.com/notifications/unsubscribe-auth/A54VSXONGWW7A7N2QZXLCYD2JP6EPAVCNFSM6AAAAABUXJCJVKVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTCNZWGMYTAOA>
> .
> You are receiving this because you authored the thread.Message ID:
> ***@***.***>
>
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You can also set the list in the constructor of the class: class Some:
constructor:
create // Or inline the 'create' function here.
... |
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Is it possible in toit to describe several similar functions, place references to them in a list, and then call these functions one after another in a loop (through the list, naturally)?
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