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Re^3: The sum of absolute differences in the counts of chars in two strings.

by Limbic~Region (Chancellor)
on Nov 20, 2011 at 01:23 UTC ( #939019=note: print w/ replies, xml ) Need Help??


in reply to Re^2: The sum of absolute differences in the counts of chars in two strings.
in thread The sum of absolute differences in the counts of chars in two strings.

BrowserUk,
I don't understand the example. Should that t => 0 and t => 1 be 1 not 2?

Update: I am not going to have a chance to play with any of my ideas so I will just share them here in case they are of any help. I was hoping that there would be a way to "cancel out terms" such that there was less work to do. The two ideas I had for that would be performing bitwise operations on the strings to find out which characters were in common and only counting the remaining ones. The second idea I had would be to process the string in chunks rather than characters. If I were trying to do a generic solution though - I would like go with Inline::C (array vs hash) incrementing values for the first string, decrementing values for the second string and summing the 256 indices for the result in the end.

Cheers - L~R


Comment on Re^3: The sum of absolute differences in the counts of chars in two strings.
Re^4: The sum of absolute differences in the counts of chars in two strings.
by BrowserUk (Pope) on Nov 20, 2011 at 13:14 UTC
    Should that t => 0 and t => 1 be 1 not 2?

    Yes. Now corrected.


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