On 10/14/23 09:21, Thomas J Powderly wrote:
a casual look saw a _lot_ of bits in a double
so i thought ' how many 7 bit ascii chars could be encoded'?
allowing short messages to be sent
like this:
# encode 9 chars into 64bit container
str="WakeuNnow"
n= 0
for c in str:
n = n | (ord(c) & 0x7f)
n = n << 7
print(bin(n))
0b1010111110000111010111100101101010111100001001110110111111101110000000
nsav = n
# get the 9 chars back
n = nsav
l = len(str)
for byt in range(l+1):
c=n&0x7f
cl[l-byt] = chr(c)
n=n>>7
# display the chars retrieved
cl
['W', 'a', 'k', 'e', 'U', 'p', 'N', 'o', 'w', '\x00']
just for s&g
tomp
Chuckle, there is a typu above TomP, the lowercase p is missing from
your original string. ;o)>
Neat trick, but only 88.888888889% compression. Other compression
methods will beat that. However, one might try it on 100 kilobytes of 7
bit ascii text, then gzip -best its output. Then compare that size to a
gzip -best of the original to see if it is an improvement. Then to be
amazed, make a pdf of it. The pdf will probably be smaller.
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Cheers, Gene Heskett.
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