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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

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#4: Post edited by

hyper-neutrino‭ · 2021-06-07T23:37:23Z (almost 3 years ago)

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~~# [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

hyper-neutrino‭ · 2021-06-07T21:22:20Z (almost 3 years ago)

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# [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

hyper-neutrino‭ · 2021-06-07T21:21:52Z (almost 3 years ago)

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# [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

hyper-neutrino‭ · 2021-06-07T21:13:19Z (almost 3 years ago)

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# [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"

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