Forex Trading - Lot: The standard transaction size in a forex transaction. Usually this is 10,000 currency units, but may be 1,000 in mini-lots. forex trading
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Func is a delegate (pointer) to a method, that takes zero, one or more input parameters, and returns a value (or reference). Predicate is a special kind of Func often used for comparisons. Though widely used with Linq, Action and Func are concepts logically independent of Linq. C++ already contained the basic concept in form of typed function pointers. Here is a small example for Action and Func without using Linq: