| Package | rp-compress |
| Description | Recursive pair compression for text |
| Node Version | >= 0.4 |
rp = require 'rp-compress'
test = "heyo"
enc = rp.compress test
dec = rp.decompress encrp-compress can acheive 45-50% compression with standard ASCII text
-
Find the two-char bigram that appears most frequently in the source
-
Replace the bigram with a currently-unused byte value and store it in a reference
-
Repeat until there are no more unique bigrams (or the reference becomes full)
Input (396 chars)
testtesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttesttest
Output (37 chars)
'\u0000\u000b\n\u0004\n\t\b\t\b\b\b\u0007\u0007\u0007\u0006\u0006\u0006\u0005\u0005\u0005\u0004\u0004\u0004\u0003\u0003\u0003\u0002t\u0002\u0001s\u0001te\u0000\u000b\u0003'
Input (1870 chars)
We're no strangers to love
You know the rules and so do I
A full commitment's what I'm thinking of
You wouldn't get this from any other guy
I just wanna tell you how I'm feeling
Gotta make you understand
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
We've known each other for so long
Your heart's been aching but
You're too shy to say it
Inside we both know what's been going on
We know the game and we're gonna play it
And if you ask me how I'm feeling
Don't tell me you're too blind to see
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
(Ooh, give you up)
(Ooh, give you up)
(Ooh)
Never gonna give, never gonna give
(Give you up)
(Ooh)
Never gonna give, never gonna give
(Give you up)
We've know each other for so long
Your heart's been aching but
You're too shy to say it
Inside we both know what's been going on
We know the game and we're gonna play it
I just wanna tell you how I'm feeling
Gotta make you understand
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
Never gonna say goodbye
Never gonna tell a lie and hurt you
Output (813 chars)
þa�ýüûü#ûúùú�¥ùø÷øGo÷öõöttõôóô,óòñòu�ñðïð��ïa�îíìí�eìë'vêéèé��èçæç§zæåäåo�äãâã��âáàá��àßÞß�hÞÝÜÝ�rÜÛÚÛ�$ÚÙØÙ�&Ø×Ö× bÖÕÔÕutÔÓÒÓ��ÒÑÐÑshÐÏÎÏy ÎÍÌÍ�(ÌËÊË��ÊÉÈÉnsÈÇÆÇidÆÅÄwÄÃÂbÂÁÀÁo�À¿¾¿ �¾½¼½��¼»º»n�º¹¸¹�n¸·¶·¶µ´µ�e´³²³�a²±°±m)°¯®¯we®¬�e¬«ª«ª©¨©pl¨��§� ¦��¥¤�¤£�£¢z¢¡�¡h" ���w��e��lo�st�&
�s��������&��t��ha�o����� ��ch�
W�r �ea��m�I'��b�t��
I���%�t'�ee�it�'r�/"�{�� o�Z~~L}}q||x�{
Yz fxgq`#g0_`^�_)]^\X]h[\JF[urZ
NX�VVTUU�STRCS>QRPdQ<OP-@O:MNaM8KL�iK�HJv�H,EFupEcBC�nBr?@��?y=>.$=�;<r�;(9:649�782�7o56��5d34de3b12s�1ye0li/kn.ru-le,+�+*k*ma�(s�&i�%s $�a#!�"� !t��n �l �ay�thg�el���� �nd�
v�y� Ne ���nna ��o�er�ou� gWe�n��ra��%��ve� .-%��d�I
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(MIT License)
Copyright (c) 2012 Fractal contact@wearefractal.com
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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