them as the ultimate global variables.
string_in_file is used for storing a string in a file. In addition to
writing a string value to a file and reading a string value from a file,
you can also:
1. Check to see if a particular string value is present in a file.
2. Replace every instance of a given string in a file with another string.
array_in_file is used for storing an array of strings in a file, with each
string separated by a newline character.
I'm using string_in_file and array_in_file in my bsf_scrape and dvi_scrape
gems, and I'm integrating them into my Bargain Stock Funds
(http://www.bargainstockfunds.com) and Doppler Value Investing
(http://www.dopplervalueinvesting.com) web sites as well. These gems are
very simple, but they help me write cleaner code, as I don't have to keep
rewriting the functions for every Ruby gem or Rails app.
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