Re: [Bug-apl] dynamic function not referencing global?

[Juergen Sauermann]

Hi, correct. To explain why this is so, consider this:       {1+2} 3       {1+⍵} SYNTAX ERROR       {1+⍵} 5 6 Therefore in       F0←{1+2} GNU APL first reduces {1+2} to 3 and then assigns 3 to F0, making F0 a variable because a values is being assigned to a name. This is normal APL and holds for all niladic functions and not only for niladic lambdas. In contrast, in       F1←{1+⍵} {1+⍵} cannot be reduced (as opposed to {1+⍵} 5 which can), so it is shifted onto the evaluation stack, then ← is shifted (still not being able to be reduced), and finally  F1 is shifted. At this point the stack contains the valid phrase F1←{1+⍵}, which can be reduced and causes F1 to become a monadic function bound to the name F1. /// Jürgen On 10/25/2016 07:01 PM, Christian Robert wrote: DISPLAYhand←{,(⍪hand),' '} this create a variable DISPLAYhand this is because de {} does not contain neither alpha nor omega. Xtian. On 2016-10-25 12:54, alexwei...@alexweiner.com wrote: Hi bug-apl, Why does DISPLAYhand not use the new value of hand on the second call?       deck←''       deck←deck,"🂢" "🂲" "🃂" "🃒"       deck←deck,"🂣" "🂳" "🃃" "🃓"       deck←deck,"🂤" "🂴" "🃄" "🃔"       deck←deck,"🂥" "🂵" "🃅" "🃕"       deck←deck,"🂦" "🂶" "🃆" "🃖"       deck←deck,"🂧" "🂷" "🃇" "🃗"       deck←deck,"🂨" "🂸" "🃈" "🃘"       deck←deck,"🂩" "🂹" "🃉" "🃙"       deck←deck,"🂪" "🂺" "🃊" "🃚"       deck←deck,"🂫" "🂻" "🃋" "🃛"       ⍝deck←deck,"🂬" "🂼" "🃌" "🃜"   ⍝knights       deck←deck,"🂭" "🂽" "🃍" "🃝"       deck←deck,"🂮" "🂾" "🃎" "🃞"       deck←deck,"🂡" "🂱" "🃁" "🃑"       deck ← ⊖13 4 ⍴ deck       hand←(∈deck)[13?52]       DISPLAYhand←{,(⍪hand),' '}       DISPLAYhand 🂢 🃈 🃃 🂷 🃞 🃙 🃝 🂫 🃋 🃕 🃒 🃂 🂧       hand←(∈deck)[13?52]       DISPLAYhand 🂢 🃈 🃃 🂷 🃞 🃙 🃝 🂫 🃋 🃕 🃒 🃂 🂧       hand 🂤🂺🂾🂷🂪🂱🂳🂸🃚🃅🂻🂲🂭 Thanks, Alex