Maybe I did not quite understand what it needs, but to unite two files and eliminate similar occurrences; It would do so:
$ cat SmallerFile.txt LargerFile.txt | sort | uniq > OutputFile.txt sort (order a-z) and uniq (remove duplicates); Attachment my result. att, Valessio Brito Em qui, 6 de jun de 2019 às 16:27, <[email protected]> escreveu: > > Here's my task in plain language: > > Compare two files of different sizes, each with two columns: > For each element(s) in the first column of the larger file, > find all matches to those elements in the first column of the smaller > file, > and > Then print the matching row(s) of the larger file, followed by the matching > rows of the smaller file. > > Sometimes there will be more than one element in the larger file that is > duplicated. For those, > print the duplicated rows from the larger file before printing the matching > rows of the smaller file. > > The output file should be two columns, with the first column containing the > pertinent > (i.e., duplicated) elements, and the second column listing all the associated > instances. > > There aren't any duplications in the second column of either file; > and nothing in either second column matches anything in the other second > column. > > This seems easy enough to explain and to perform by visual inspection, > but only a script will work for the main files. > > I'm attaching three files: LargerFile.txt; SmallerFile.txt; and > OutputFile.txt. > They've been obtained by visually matching the Real-LargerFile.txt (500,000 > rows) > with the Real-SmallerFile.txt (200,000 rows) and then doing some obfuscation. > > All files are sorted on their first columns. > > George Langford > >
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