On 2018-08-05 07:31, Monte Goulding via use-livecode wrote:
Given I have been wanting to do ^ for a couple of years I decided to
just go ahead and do it… might be a while before we have time to
bikeshed the syntax though.
https://github.com/livecode/livecode/pull/6626
<https://github.com/livecode/livecode/pull/6626>
Examples:
local tFoo,tBar
put "foo" into tFoo[1]
put "bar" into tFoo[2]
put "baz" into tBar[1]
put "bar" into tBar[2]
filter keys of tFoo with expression tFoo[each] is tBar[each]
— tFoo now has one key 2 which is `bar`
put “yes,foo” & return & “no,bar” into tFoo
filter lines of tFoo with expression item 1 of each is “yes”
We could feasibly not use `with|without` for this forcing the
expression to return true to filter. If we went that way then perhaps
`where` would be nicest?
filter lines of tFoo where item 1 of each is “yes”
Geez @Monte - you do like creating work for me don't you! ;)
In terms of syntax - definitely not 'with expression' - that's ghastly.
It is a 'where' clause - in the same vein as SQL and other query
languages - so no bike-shedding required there (also, pleasingly, all
other 'filter' types become sugar for a where clause using operators
which the language does not have yet - but obviously we have the code
for...).
If we are going to bike-shed over syntax - can we do so over the use of
'filter' itself. I don't know why but I have a complete mental block
about it - regardless of how many times I use it or read it - I always
have to 'double-think' to work out what form to use - is that just me?
filter <things> of X with Y
filter <things> of X without Y
I couldn't tell you just by looking *what* they actually do. I'm not
sure why but I think the verb is actually wrong - in all cases you have
a set of things and you are either keeping an element, or removing an
element... So I wonder if:
keep <things> of X where Y
discard <things> of X where Y
(I'm not particularly attached to keep/discard - but it does need to be
a pair of 'true' antonyms which don't intersect with any other 'core'
pairs of such things we have).
Might be more appropriate?
Of course, maybe it is just 'with' / 'without' are inappropriate, and
'where' might actually help me retrain my mind to see with/without as
the sugar they truly are.
Anyway, thought it worth throwing out there to see what people think?
Warmest Regards,
Mark.
--
Mark Waddingham ~ m...@livecode.com ~ http://www.livecode.com/
LiveCode: Everyone can create apps
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