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BUILT-IN MATHEMATICA SYMBOL
FilterRules
FilterRules[rules, patt]
filters the list rules by picking out only those rules whose left-hand sides match patt.
FilterRules[rules, {patt1, patt2, ...}]
picks out rules whose left-hand sides match any of the 
.
Details
- The rules in the list rules can be either
or 
rules. - If any of the
is a rule of the form 
, then it is treated the same as lhs. - If
is a string, it will also match a symbol whose name is the string. - FilterRules[rules, Except[patt]] gives all rules except those whose left-hand sides match patt.
New in 6
