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Challenges Evaluation order of an APL n-train

Jelly, 8 bytes ṖUs2UṭµF Try it online! -1 byte thanks to caird coinheringaahing (Also posted on Stack Exchange by myself) ṖUs2UṭµF Main Link Ṗ pop (remove last element; for numbe...

posted 3y ago by hyper-neutrino‭  ·  edited 3y ago by hyper-neutrino‭

Answer
#4: Post edited by user avatar hyper-neutrino‭ · 2021-06-07T23:37:23Z (over 3 years ago)
  • # [Jelly], 9 bytes
  • ’RUs2UṭµF
  • [Try it online!][TIO-kpn42hiq]
  • [Jelly]: https://github.com/DennisMitchell/jelly
  • [TIO-kpn42hiq]: https://tio.run/##y0rNyan8//9Rw8yg0GKj0Ic71x7a6vbf0CDocPujpjXu/wE "Jelly – Try It Online"
  • (Also posted on [Stack Exchange](https://codegolf.stackexchange.com/a/229217/68942) by myself)
  • ```
  • ’RUs2UṭµF Main Link
  • ’ decrement
  • R range
  • U reverse
  • s2 slice into chunks of length 2
  • U reverse each chunk
  • ṭ tack; prepend the input
  • µ (new chain)
  • F flatten the list
  • ```
  • # [Jelly], 8 bytes
  • ṖUs2UṭµF
  • [Try it online!][TIO-kpn96on4]
  • [Jelly]: https://github.com/DennisMitchell/jelly
  • [TIO-kpn96on4]: https://tio.run/##AR8A4P9qZWxsef//4bmWVXMyVeG5rcK1Rv8xMFLDh@KCrEf/ "Jelly – Try It Online"
  • -1 byte thanks to caird coinheringaahing
  • (Also posted on [Stack Exchange](https://codegolf.stackexchange.com/a/229217/68942) by myself)
  • ```
  • ṖUs2UṭµF Main Link
  • Ṗ pop (remove last element; for numbers, comes with an implicit range)
  • U reverse
  • s2 slice into chunks of length 2
  • U reverse each chunk
  • ṭ tack; prepend the input
  • µ (new chain)
  • F flatten the list
  • ```
#3: Post edited by user avatar hyper-neutrino‭ · 2021-06-07T21:22:20Z (over 3 years ago)
  • # [Jelly], 9 bytes
  • ’RUs2UṭµF
  • [Try it online!][TIO-kpn42hiq]
  • [Jelly]: https://github.com/DennisMitchell/jelly
  • [TIO-kpn42hiq]: https://tio.run/##y0rNyan8//9Rw8yg0GKj0Ic71x7a6vbf0CDocPujpjXu/wE "Jelly – Try It Online"
  • ```
  • ’RUs2UṭµF Main Link
  • ’ decrement
  • R range
  • U reverse
  • s2 slice into chunks of length 2
  • U reverse each chunk
  • ṭ tack; prepend the input
  • µ (new chain)
  • F flatten the list
  • ```
  • # [Jelly], 9 bytes
  • ’RUs2UṭµF
  • [Try it online!][TIO-kpn42hiq]
  • [Jelly]: https://github.com/DennisMitchell/jelly
  • [TIO-kpn42hiq]: https://tio.run/##y0rNyan8//9Rw8yg0GKj0Ic71x7a6vbf0CDocPujpjXu/wE "Jelly – Try It Online"
  • (Also posted on [Stack Exchange](https://codegolf.stackexchange.com/a/229217/68942) by myself)
  • ```
  • ’RUs2UṭµF Main Link
  • ’ decrement
  • R range
  • U reverse
  • s2 slice into chunks of length 2
  • U reverse each chunk
  • ṭ tack; prepend the input
  • µ (new chain)
  • F flatten the list
  • ```
#2: Post edited by user avatar hyper-neutrino‭ · 2021-06-07T21:21:52Z (over 3 years ago)
  • # [Jelly], 9 bytes
  • ’RUs2UṭµF
  • [Try it online!][TIO-kpn42hiq]
  • [Jelly]: https://github.com/DennisMitchell/jelly
  • [TIO-kpn42hiq]: https://tio.run/##y0rNyan8//9Rw8yg0GKj0Ic71x7a6vbf0CDocPujpjXu/wE "Jelly – Try It Online"
  • # [Jelly], 9 bytes
  • ’RUs2UṭµF
  • [Try it online!][TIO-kpn42hiq]
  • [Jelly]: https://github.com/DennisMitchell/jelly
  • [TIO-kpn42hiq]: https://tio.run/##y0rNyan8//9Rw8yg0GKj0Ic71x7a6vbf0CDocPujpjXu/wE "Jelly – Try It Online"
  • ```
  • ’RUs2UṭµF Main Link
  • ’ decrement
  • R range
  • U reverse
  • s2 slice into chunks of length 2
  • U reverse each chunk
  • ṭ tack; prepend the input
  • µ (new chain)
  • F flatten the list
  • ```
#1: Initial revision by user avatar hyper-neutrino‭ · 2021-06-07T21:13:19Z (over 3 years ago) 
# [Jelly], 9 bytes

    ’RUs2UṭµF

[Try it online!][TIO-kpn42hiq]

[Jelly]: https://github.com/DennisMitchell/jelly
[TIO-kpn42hiq]: https://tio.run/##y0rNyan8//9Rw8yg0GKj0Ic71x7a6vbf0CDocPujpjXu/wE "Jelly – Try It Online"