lib/totally_lazy/predicates.rb in totally_lazy-0.1.45 vs lib/totally_lazy/predicates.rb in totally_lazy-0.1.46

@@ -18,6 +18,10 @@
 
   def equal_to?(that)
     ->(this) { this == that }
   end
   alias is equal_to?
+
+  def where(fn, predicate)
+    ->(value) { predicate.(fn.(value)) }
+  end
 end
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