SequenceableCollection has with:do:.
Add
������ with: other count: testBlock
�������������� |r|
�������������� r := 0.
�������������� self with: other do: [:x :y |
���������������������� (testBlock value: x value: y) ifTrue: [r := r + 1]].
�������������� ^r

I have this in my library anyway.�� Now

distanceStrand1: a strand2: b
������ ^a with: b count: [:x :y | x ~= y]

#with:do: already checks that the sequences have the same size;
it's too confusing if the error reported in this case is different
from the error for #with:do:.

On Tue, 15 Sep 2020 at 16:59, Roelof Wobben via Pharo-users <pharo-users@lists.pharo.org> wrote:
Op 14-9-2020 om 22:19 schreef Hern��n Morales Durand:
^ (1 to: self size) count: [ : i | (self at: i) ~= (aString at: i) ]


With that code I get a few problems but this is working

distanceStrand1: aString strand2: aString2
������ aString size == aString2 size
������ ������ ifFalse: [ DomainError signal: (self messageFor: aString strand2: aString2) ].
������ ^ (1 to: aString size)
������ ������ count: [ :i | (aString2 at: i) ~= (aString at: i) ]

Roelof