Greetings,
I need to write a perl script to evaluate a formula based on the contents specified in a configuration file using comma separated value format. For instance, a formula to calculate free swap space in a window system. For the sake of discussion, lets assume there are 3 lines in this file: 127.0.0.1,data,Win32_OperatingSystem,FreeSpaceInPagingFiles,,FreeSpaceInPagingFiles 127.0.0.1,data,Win32_PageFile,FileSize,,PageFileSize 127.0.0.1,formula,SwapUsage,,(FreeSpaceInPagingFiles/PageFileSize)*100

The first two lines define two data points, FreeSpaceInPagingFiles and PageFileSize. The third line defines a formula, SwapUsage and the formula is (FreeSpaceInPagingFiles/PageFileSize)*100.
The formulas are specified by the users so it can be different for each type of data point. My question is that when we retrievd data for one data, such as FreeSpaceInPagingFiles and I stored it in a hash, such as $hash(FreeSpaceInPagingFiles) = 732448;
How do I evaluate the formula dynamically? In other words, how to replace the formula with real data and get the result?
Thanks for your help,
tmy05

In reply to How to evaluate a formula? by tmy05

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