Add "leftmost" as an alternative to `⊑y` (as mentioned at https://mlochbaum.github.io/BQN/commentary/fiveyears.html): ``` x ⊣´ y1 ``` "First element of list y1, with default x if y1 is empty"
Add "leftmost" as an alternative to
⊑y(as mentioned at https://mlochbaum.github.io/BQN/commentary/fiveyears.html):"First element of list y1, with default x if y1 is empty"