Question

Golf – implement a simple templating scheme.

Expansions are:

• %KEY% -> VALUE
• %% -> %

Command line arguments:

• ARG1: dictionary file, formatted in the key=value style as in example
• ARG2: template file

Here my not quite golf attempt(python): 261 chars.

import sys dd = dict([ll.split('=',2) for ll in open( sys.argv[1],'r') if len(ll.split('=', 2)) == 2]) tt = ''.join([ ll for ll in open( sys.argv[2],'r')]) sys.stdout.write(''.join([(((s == '') and '%') or ((s in dd) and dd[s]) or s) for s in tt.split('%')])) 

DICT

NAME=MyName ODDS=100 

TEMPLATE

I, %NAME% am %ODDS% %% sure that that this a waste of time. 

RESULT

I, My Name am 100 % sure that this is a waste of time. 

Yes, I realize this is a defective templating system, ‘snaps’ for a shorter and better implementation.

Answer 1

In Python, you could leverage the inbuilt string formatting to make it shorter. Just needs a little regex hacking to get the syntax to match.

import sys, re sys.stdout.write(re.sub(r'%(.+?)%',r'%(\1)s',open(sys.argv[2]).read())%dict(l.split('=',2) for l in open(sys.argv[1],'r'))) 

Down to 139 bytes. (Though perhaps the args/file-IO stuff shouldn’t really be part of a golf challenge?)