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The Alphabet Chromosome

Introduction

Alphabet challenges are in our DNA, so let's show it.

Challenge

Print the following the text exactly:

AaBbCc cCbBaA
BbCcDd dDcCbB
EeFfGg gGfFeE
HhIiJj jJiIhH
KkLlMm mMlLkK
NnOoPp pPoOnN
QqRrSs sSrRqQ
TtUuVv vVuUtT
 WwXx xXwW
 Yy yY
 ZZ
 zz
 ZZ
 Yy yY
 WwXx xXwW
TtUuVv vVuUtT
QqRrSs sSrRqQ
NnOoPp pPoOnN
KkLlMm mMlLkK
HhIiJj jJiIhH
EeFfGg gGfFeE
BbCcDd dDcCbB
AaBbCc cCbBaA

Rules

You must match the case of each letter
Trailing and/or leading newlines and/or spaces are allowed

Winning

Shortest code in bytes wins.

Answer*

## PowerShell v2+, <s>175</s> <s>169</s> <s>163</s> 154 bytes



 ($x=(-join(65..67+66..86|%{$_;32+$_}|%{[char]$_})-split'(.{6})'-ne'')+' WwXx'+' Yy'+(' '*9+'Z')|% *ht 10|%{$_+-join$_[9..0]})
 ' '*9+'zz'
 $x[10..0]

[Try it online!][TIO-jsyp3o1r]

[PowerShell]: https://github.com/TryItOnline/TioSetup/wiki/Powershell
[TIO-jsyp3o1r]: https://tio.run/##LY3LCoMwFET3fkUWkZsYcoktppXS7@hDREoRtAQVFUx9fHuq0lkdhsNMUw952xW5Mc4xaq9MfuqyYjpC1CehNeJZz/5Es8vxIGi2rJy8i1ebrsxl15iyB4aTXjjIKgfgAgght@FuYactjy8IBgSCWMAT@OyToOhJqPZdsR/SLIkRVbpw7y@OI3jUJqHaaud@ "PowerShell – Try It Online"

Abuses the fact that default `Write-Output` at the end of execution inserts a newline between elements.

The first line constructs the branches. We loop over two ranges corresponding to the ASCII values for the capital letters, each iteration output a `char` array of that letter and that letter `+32` (which is the lowercase ASCII point). That's `-join`ed together into one long string, then `-split` on every six elements (encapsulated in parens so they're preserved), followed by a `-ne''` to pull out the empty elements as a result of the split, thus forming an array of strings.

These strings in an array get array-concatenation to add on the `WwXx`, `Yy`, and `Z` elements, then a PadRig`ht 10` to make them all the appropriate width. At this point we have an array of strings like the following (one element per line).

 AaBbCc 
 BbCcDd 
 EeFfGg 
 HhIiJj 
 KkLlMm 
 NnOoPp 
 QqRrSs 
 TtUuVv 
 WwXx 
 Yy 
 Z


That whole array is piped to another loop to construct the mirrored strings with `-join` and array-reversing `[9..0]`.

 AaBbCc cCbBaA
 BbCcDd dDcCbB
 EeFfGg gGfFeE
 HhIiJj jJiIhH
 KkLlMm mMlLkK
 NnOoPp pPoOnN
 QqRrSs sSrRqQ
 TtUuVv vVuUtT
 WwXx xXwW 
 Yy yY 
 ZZ 

We save the resulting strings into `$x` and enclose in parens to also place a copy on the pipeline.

The next line places the `zz` string on the pipeline, then the `$x` array in reverse order. All of those are left on the pipeline and output is implicit.

 PS C:\Tools\Scripts\golfing> .\alphabet-chromosome.ps1
 AaBbCc cCbBaA
 BbCcDd dDcCbB
 EeFfGg gGfFeE
 HhIiJj jJiIhH
 KkLlMm mMlLkK
 NnOoPp pPoOnN
 QqRrSs sSrRqQ
 TtUuVv vVuUtT
 WwXx xXwW 
 Yy yY 
 ZZ
 zz
 ZZ
 Yy yY 
 WwXx xXwW 
 TtUuVv vVuUtT
 QqRrSs sSrRqQ
 NnOoPp pPoOnN
 KkLlMm mMlLkK
 HhIiJj jJiIhH
 EeFfGg gGfFeE
 BbCcDd dDcCbB
 AaBbCc cCbBaA

*-9 bytes thanks to mazzy.*

If this is an answer to a challenge…

…Be sure to follow the challenge specification. However, please refrain from exploiting obvious loopholes. Answers abusing any of the standard loopholes are considered invalid. If you think a specification is unclear or underspecified, comment on the question instead.
…Try to optimize your score. For instance, answers to code-golf challenges should attempt to be as short as possible. You can always include a readable version of the code in addition to the competitive one. Explanations of your answer make it more interesting to read and are very much encouraged.
…Include a short header which indicates the language(s) of your code and its score, as defined by the challenge.

More generally…

…Please make sure to answer the question and provide sufficient detail.
…Avoid asking for help, clarification or responding to other answers (use comments instead).

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\$\begingroup\$ 154 bytes - '(.{6})' instead (......) and RightPad instead tail spaces. \$\endgroup\$

mazzy
– mazzy

2019年03月07日 04:22:42 +00:00
Commented Mar 7, 2019 at 4:22

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