Falkkin is working on a Java Huffman encoder...
Moved only by the will to serve, I propose him an
example of what he could do if he did that in Perl... :-)
$"=$/=$_;map{$0{$_}++}split//,$_=<>;@0=map{[$_,$0{$_},$_]}keys%0;
$/=1+1;until(@0==1){@0=sort{$$b[1]<=>$$a[1]}@0;$t=pop@0;$p=pop@0;
push@0,[[$$t[0],$$p[0]],$$t[1]+$$p[1],$$t[$/].$$p[$/]];map{map{$t
{$_}=$;%$/.$t{$_}}split//;$;++}$$t[$/],$$p[$/]}s/(.)/$t{$1}/gs;sub
_{my$t=pop;if(ref$t){my@t=map{if(!ref$$t[$_]){1,unpack"b8",$$t[$_]}
else{0,""}}0,1;"@t[0,$/,1]"._($$t[0])._($$t[1])."$t[-1]"}}print
pack"sB*",length,_($0[0][0]).$_
(This was one of my "helpers" for OPC5)
Corresponding Huffman decoder to be posted soon.
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
| |
For: |
|
Use: |
| & | | & |
| < | | < |
| > | | > |
| [ | | [ |
| ] | | ] |
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
|
|
