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Word Set Square

+6
−0

Challenge

Given a string, e.g. Hello, do the following:

Mirror it:

Hello -> HelloolleH

and create a right triangle using it as the sides:

H         
ee        
l l       
l  l      
o   o     
o    o    
l     l   
l      l  
e       e 
HelloolleH

Which looks sort of like a set square.

That's it!

Scoring

This is code-golf. Shortest answer in each language wins.

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Post
+1
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Python 3, 196 195 145 102 91 89 87 79 bytes

x=input();x+=x[::-1];i=-1
for c in x[:-1]:print(c*(i>-1)+" "*i+c);i+=1
print(x)

Try it online!

Golfed 50 bytes thanks to @celtschk's advice. Golfed another 43 bytes thanks to @celtschk's advice. Golfed another 11 bytes thanks to @celtschk's advice. Golfed another 2 bytes thanks to @celtschk's advice. Golfed 2 bytes thanks to @Moshi's advice. Golfed another 8 bytes thanks to @Moshi's advice.

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4 comment threads

Sub 80 (1 comment)
bool(i) -> (i>0) (1 comment)
Further golfing opportunity (5 comments)
You can save quite a few bytes here. First, you can replace `print(" ",end='')` with `print(end=" ... (1 comment)

Comments on Word Set Square

Further golfing opportunity
celtschk‭ wrote 3 months ago:

I've now noticed that you can dramatically shorten the code again by using Python's slicing syntax. Just replace the complete first loop with x+=x[-2::-1] and then remove the now unused variable j. This brings the byte count down to 103.

Try it online!

celtschk‭ wrote 3 months ago:

And another golfing opportunity: the if i: can be replaced by multiplying x[i] with bool(i), and then the whole line can be combined into a single string, getting rid also of the end=. This brings down the byte count to 92.

Try it online!

Mark Giraffe‭ wrote 3 months ago:

celtschk‭ In your TIO links, you always placed a newline after the semicolon. I don't want you to keep on doing that if it will make me edit over and over, okay? :)

celtschk‭ wrote 3 months ago:

Mark Giraffe‭ Actually it was the semicolon that I forgot to delete when I deleted the statement after it.

celtschk‭ wrote 3 months ago:

BTW, I just found you can reduce by two further bytes by using enumerate in the loop. While the enumerate expression itself is a bit longer, that is more than made up by replacing x[i] with c in the loop. And no semicolon this time ;-)

Try it online!

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