Thanks to @KritixiLithos for helping me out with this challenge!
V is a programming language that I wrote so that I could use and extend vim for code-golf challenges. The very first commit was on March 3rd, 2016, meaning that today V turns one year old! Woo-hoo
Over V's first year of existence, there have been 176 commits from four different contributors, 140 answers from 12 different users, and too many broken duplicate operators to count. It has an online interpreter, generously hosted by @Dennis, which has been run almost 8,000 times since December.
Let's have a challenge to celebrate V's birthday! Since most features in V are designed with string manipulation and ascii-art in mind, it just seems natural that any challenge celebrating V should be about ascii art. So your challenge for today is to take a word as input, and reshape that word in the shape of a V. For example, the input "Hello" should give the following V:
Hello olleH Hello olleH Hello olleH Hello olleH Hello olleH HellolleH HellleH HeleH HeH H
Here are some details about what your V should look like. If the input string is n characters long, the V should be
n*2 lines tall. The very first line should consist of:
<input string><(n*2) - 1 spaces><input string reversed>
On each new line, one space is added to the beginning, and the two sides of the string move towards each other, removing any overlapping characters. Until the very last line, which is just the first character of input. Trailing whitespace on each line is acceptable, and a trailing newline is allowed too.
You can assume that the input will always be printable ASCII without any whitespace in it, and you may take input and output in any reasonable method. Here are some more sample inputs:
Happy: Happy yppaH Happy yppaH Happy yppaH Happy yppaH Happy yppaH HappyppaH HapppaH HapaH HaH H Birthday: Birthday yadhtriB Birthday yadhtriB Birthday yadhtriB Birthday yadhtriB Birthday yadhtriB Birthday yadhtriB Birthday yadhtriB Birthday yadhtriB BirthdayadhtriB BirthdadhtriB BirthdhtriB BirthtriB BirtriB BiriB BiB B V!: V! !V V! !V V!V V ~: ~ ~ ~
Of course, since this is code-golf, standard loopholes are banned and your goal is to write the shortest possible program to complete this task. Happy golfing!
For what it's worth, I have a soft spot for vim answers, so imaginary bonus points for using vim or V, although any language is acceptable. :)