Jun 23

In one of our project we needed to search for multiple words from a file and return the found words.
These files would be large and there might be large number of words to search for also.

Ruby has a good support for regexp, however it would be slow in doing these searches for patterns as compared to unix commands and hence we decided to look for certain unix commands for doing these searches.

We went through “grep“, “awk” and “boyermoore searching algorithm in ruby” for doing this search.
Each of these were used for searching patterns in a file.

grep and AWK were giving the results as the line(not he line number but the whole content of line) on which the matching pattern were present. Working on grep and awk further we found differnt ways of searching from files using these.
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