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Top Forums Programming merging two files with sorted integers in c Post 302381955 by brett01 on Monday 21st of December 2009 02:32:26 PM
Old 12-21-2009
Quote:
Originally Posted by gaurav1086
Hello brett,
there are several known algorithms for that purpose. I feel the K-way-merge algorithm is the best one that I have used for that purpose.
In addition to that you can put up a condition to remove the duplicate entries
Or otherwise you can first remove the duplicate entries from the two sources after/before sorting and then implement the K-way merge algorithm .
Feel free to reply if any doubts.
You would like to check this in case
K-Way Merge | Get K-Way Merge at SourceForge.net
Regards.
Is the key way merge algorithm for already sorted files??
 

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UNSORT(1)						    BSD General Commands Manual 						 UNSORT(1)

NAME
unsort -- reorder lines in a file in semirandom ways SYNOPSIS
unsort [-hvrpncmMsz0l] [--help] [--version] [--random] [--heuristic] [--identity] [--concatenate] [--merge] [--merge-random] [--seed integer] [--zero-terminated] [--null] [--linefeed] [file ...] DESCRIPTION
unsort prints the lines in the input files (or standard input) in semi-random order. Available algorithms are a Mersenne Twister based PRNG and a heuristic algorithm that aims to create a subjective even distribution. Command line options -h, --help Display a concise summary of the available options and argument syntax. -v, --version Display version and copyright information. -r, --random Use the Mersenne Twister based randomization algorithm. -p, --heuristic Use the heuristic "shuffling" algorithm which permutes the lines in such a way that they're spread more or less evenly in the output. This is the default. -n, --identity Do not reorder lines in the input. Useful if you just want to merge the files. -r, --concatenate Concatenate all input files then apply the shuffling algorithm to the result as a whole. -m, --merge Shuffle all input files seperately then merge the result. Equal-sized files will be merged in the order in which they appear on the command line. -M, --merge-random Shuffle all input files seperately then merge the result. Equal-sized files will be merged in random order. This is the default. -s, --seed integer Use this integer as a seed, instead of random data from the environment. -z, --zero-terminated, -0, --null Lines are terminated with a character. -l, --linefeed Lines are terminated with a character. This is the default. SEE ALSO
sort(1) Free Software June 1, 2019 Free Software
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