Socialmetrica/Socialmetrica.package/TweetsCollection.class/instance/oldestOf..st

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accessing
oldestOf: userId
self messages ifNil: [ ^ nil ].
self messages ifEmpty: [ ^ nil ].
^ ((self select: [ :tweet | tweet authorId = userId ])
select: [ :tweet | tweet created = (((self select: [ :each | each authorId = userId ]) collect: [ :each | each created ]) asSortedCollection first)]) first