use strict ;
use warnings ;
my $input = "NDDDDTSVCLGTRQCSWFAGCTNRTWNSSA 0" ;
my @F = split'',$input ;
my @ar ;
@ar[map { ord } split '','ARNDBCEQZGHILKMFPSTWYV'] = 1..127 ;
foreach ( @F ) {
    print( ($ar[ord $_] // $_ ) . " " ) ; 
}

[download]

But I can't figure out how to put this in a one-liner, does anyone want to try?

edit Feb 22, 2019 at 10:20 UTC:

Up till now I have:

perl '-M5;@ar[map { ord } split "","\0ARNDBCEQZGHILKMFPSTWYV"] = 0..12
+7' -alpe '($_=$F[0])=~s/(.)/($ar[ord $1])." "/ge' input.txt
# or
perl '-M5;@ar[map { ord } split "","\0ARNDBCEQZGHILKMFPSTWYV"] = 0..12
+7' -alpe '($_=$F[0])=~s/(.)/(defined $ar[ord $1] ? $ar[ord $1] : $1 )
+." "/ge' input.txt

[download]

As rsFalse indicated in his reply below there is a trailing space. The other thing is that everything after a space is gone missing and I can't figure out why.

edit Feb 22, 2019 at 10:49 UTC:

Thanks Eily and Discipulus for pointing out -MO=Deparse to me. The mistake that I made was: $_=$F[0] So this should work now:

# 'defined' is optional:
perl '-M5;@ar[map { ord } split "","\0ARNDBCEQZGHILKMFPSTWYV"] = 0..12
+7' -alpe '$_=~s/(.)/(defined $ar[ord $1] ? $ar[ord $1]." " : $1 )/ge'
+ input.txt

[download]

One more edit: Also note that I specifically crafted this in this manner so that this would also work:

perl '-M5;@ar[map { ord } split "","\0V\0B\0L\0\0\0Q\0\0\0\0\0\0\0E\0\
+0\0\0\0\0\0\0\0\0P\0\0I\0\0\0\0\0\0Z\0H\0\0\0\0\0\0\0\0Y\0J\0\0S\0\0\
+0\0\0D\0\0\0X\0\0\0\0\0K\0\0\0R\0\0\0\0W\0\0\0\0\0U\0\0\0\0A\0\0M\0\0
+\0F\0\0\0C\0\0T\0\0\0\0O\0\0\0\0\0\0\0\0\0\0N\0G\0\0\0\0"] = 0..127' 
+-alpe '$_=~s/(.)/($ar[ord $1] ? $ar[ord $1]." " : $1 )/ge' input.txt

[download]

In reply to Re: A little golfing challenge: Replacing letters with numbers (edit) by Veltro
in thread A little golfing challenge: Replacing letters with numbers by haukex

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