[Pharo-users] can I do this with a stream or a format

[Roelof Wobben]

Hello, Im testing all my solutions with critiz and can solve almost all problems, Only this one I cannot figure out. I have this code (gifts allButLast inject: '' into: [ :str :each | str , each , ', ' ]) , 'and ' , gifts last ] and critiz says I should use a stream . How can I make this work ? Roelof