A new version of Collections was added to project The Inbox: http://source.squeak.org/inbox/Collections-ct.948.mcz

==================== Summary ====================

Name: Collections-ct.948 Author: ct Time: 10 June 2021, 8:48:33.981588 pm UUID: 551e6fa7-8f93-ab48-8ab6-17fc5191f48c Ancestors: Collections-eem.944

Handle binary selectors in Symbol >> #asSortFunction. As long as we do not officially deprecate Symbol >> #value:value:, the current state is a bit disappointing.

Usage:

'hello' sorted: #<=> asSortFunction. "...in the past, we needed to write all this prose instead:" 'hello' sorted: [:someCharacter :someOtherCharacter | someCharacter <=> someOtherCharacter] asSortFunction.

=============== Diff against Collections-eem.944 ===============

Item was changed: ----- Method: Symbol>>asSortFunction (in category '*Collections-SortFunctions-converting') ----- asSortFunction + "Return a SortFunction around the receiver. If the receiver is a 2-arg symbol, it is assumed it will do the collation directly itself, returning -1, 0, or 1. If the receiver is a one-arg symbol, it will be evaluated for each a and b and of the sort input, and the result of sending <=> to those will be used." + + self numArgs = 0 ifTrue: [^PropertySortFunction property: self]. + self numArgs = 1 ifTrue: [^CollatorBlockFunction usingBlock: self]. - "Return a SortFunction around the receiver, where the receiver will be used as a unary message to send to both a and b during sorting, and then the result of said send will be collated in ascending order using the <=> method." - "#('abc' 'de' 'fghi') sorted: #size ascending >>> #('de' 'abc' 'fghi')"

+ self error: 'Cant be converted to sort function. It should has one or two args'.! - ^PropertySortFunction property: self!