[rules-users] Issues Regarding use " Eval"

[Rajesh_Kumar]

Hi all,

I want to use "eval" in my rules, but in rule writing guidelines Mark
has 
Written that "Eval is Evil".

I want to compare the values of Hash Map in my when (conditions) part.

1) Will anyone suggest something so that I can compare Hash Map keys in
when part?

2) Does is there any performance related issue related to "eval";

Regards

Rajesh 

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