*Correction: Above code should read:
outputs = []
state = initial_state
for inp in inputs:
out, state = my_update_func(inp, state)
outputs.append(out)
On Sun, May 13, 2018 at 11:21 AM, Peter O'Connor <peter.ed.ocon...@gmail.com
> wrote:
> target := expr
> expr as target
> expr -> target
> target given target = expr
> let target = expr
> : target expr ;
>
>
> Although in general "target:=exp" seems the most palatable of these to me,
> there is one nice benefit to the "given" syntax:
>
> Suppose you have a comprehension wherein you want to pass forward an
> internal "state" between iterations, but not return it as the output:
>
> In today's python, you'd to:
>
> outputs = []
> state = initial_state
> for inp in inputs:
> out, state = my_update_func(state)
> outputs.append(state)
>
> This could not be neatly compacted into:
>
> state = initial_state
> outputs = [out given out, state = my_update_func(inp, state) for inp
> in inputs]
>
> Or maybe:
>
> outputs = [out given out, state = my_update_func(inp, state) for inp
> in inputs given state=initial_state]
>
> Though I agree for the much more common case of assigning a value inline
> "x given x=y" seems messily redundant.
>
>
>
> On Sat, May 12, 2018 at 10:37 PM, Stephen J. Turnbull <
> turnbull.stephen...@u.tsukuba.ac.jp> wrote:
>
>> David Mertz writes:
>>
>> > Only the BDFL has a vote with non-zero weight.
>>
>> "Infinitesimal" != "zero".
>>
>> Pedantically yours,
>>
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>
>
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