[squeak-dev] The Inbox: Collections-cmm.1022.mcz

Thiede, Christoph Christoph.Thiede at student.hpi.uni-potsdam.de
Sat Nov 19 12:23:20 UTC 2022

Hm ... don't we have #splitBy: for this? This seems like a possibly dangerous breaking change to me. No strong opinion, though. :-)



Von: Squeak-dev <squeak-dev-bounces at lists.squeakfoundation.org> im Auftrag von Chris Muller <asqueaker at gmail.com>
Gesendet: Samstag, 19. November 2022 06:24:43
An: squeak-dev at lists.squeakfoundation.org
Betreff: Re: [squeak-dev] The Inbox: Collections-cmm.1022.mcz

I don't know why subStrings: should behave differently for empty fields as non-empty.

Before this change, empty fields are ignored:

    'a:b::d' subStrings: ':'  ==> " #('a' 'b' 'd') "
    '::::' subStrings: ':' ==> #()

after this change, empty fields are honored:

    'a:b::d' subStrings: ':'  ==> " #('a' 'b' '' 'd') "
    '::::' subStrings: ':' ==>  #('' '' '' '')


 - Chris

On Fri, Nov 18, 2022 at 11:14 PM <commits at source.squeak.org<mailto:commits at source.squeak.org>> wrote:
Chris Muller uploaded a new version of Collections to project The Inbox:

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

Name: Collections-cmm.1022
Author: cmm
Time: 18 November 2022, 11:14:01.223447 pm
UUID: 9a05d251-4f02-43de-94e8-0f077ec51680
Ancestors: Collections-nice.1021

Allow empty fields when using #subStrings:.

=============== Diff against Collections-nice.1021 ===============

Item was changed:
  ----- Method: String>>subStrings: (in category 'converting') -----
  subStrings: separators
        "Answer an array containing the substrings in the receiver separated
        by the elements of separators."
        | char result sourceStream subString |
-       #Collectn.
-       "Changed 2000/04/08 For ANSI <readableString> protocol."
        (separators isString or:[separators allSatisfy: [:element | element isCharacter]]) ifFalse:
                [^ self error: 'separators must be Characters.'].
        sourceStream := ReadStream on: self.
        result := OrderedCollection new.
        subString := String new.
        [sourceStream atEnd]
                        [char := sourceStream next.
                        (separators includes: char)
+                               ifTrue: [result add: subString copy.
+                                                       subString := String new]
-                               ifTrue: [subString notEmpty
-                                               ifTrue:
-                                                       [result add: subString copy.
-                                                       subString := String new]]
                                ifFalse: [subString := subString , (String with: char)]].
        subString notEmpty ifTrue: [result add: subString copy].
        ^ result asArray!

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