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c# - What is Func, how and when is it used - Stack Overflow

WEBfunc and the other predefined generic func delegates (func, func and others) are generic delegates that return the type of the last generic parameter. If you have a function that needs to return different types, depending on the parameters, you can use a func delegate, specifying the return type.

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c# - Delegates: Predicate vs. Action vs. Func - Stack Overflow

WEBMay 6, 2017 — Action : Action can take n input parameters but it returns void. func : func can take n input parameters but it will always return the result of the provided type. func, here T1,T2,T3 are input parameters and TResult is the output of it. Predicate : Predicate is also a form of func but it will always return bool.

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c# - Func vs. Action vs. Predicate - Stack Overflow

WEBfunc 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 (takes a generic parameter and returns bool). Though widely used with Linq, Action and func are concepts logically independent of Linq.

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Please what does func() mean in python when used inside a …

WEBThe expression func() means "call the function assigned to the variable func." The decorator is taking another function as an argument, and returning a new function (defined as wrapper) which executes the given function func when it is run. Here is some information about decorators. edited Jul 31, 2023 at 16:10. answered Nov 30, 2014 at 23:18.

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What's the difference between __PRETTY_FUNCTION__, …

WEBDec 8, 2010 — 366. __func__ is an implicitly declared identifier that expands to a character array variable containing the function name when it is used inside of a function. It was added to C in C99. From C99 §6.4.2.2/1: The identifier __func__ is implicitly declared by the translator as if, immediately following the opening brace of each function

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c# - Using Func delegate with Async method - Stack Overflow

WEBMay 17, 2016 — So to get this to work you can: func> myFun = async () => await myTask; edited Jun 19, 2017 at 1:44. answered May 17, 2016 at 15:34. spender. 120k 35 237 363. 4. Just be aware that the async operation might not be completed by the time the user presses a key, and Console.ReadLine() is done.

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Why would you use Expression> rather than Func?

WEBApr 19, 2020 — Conceptually, Expression<func> is completely different from func. func denotes a delegate which is pretty much a pointer to a method and Expression<func> denotes a tree data structure for a lambda expression. This tree structure describes what a lambda expression does rather than doing the actual thing.

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c# - Explanation of Func - Stack Overflow

WEBMay 18, 2009 — string Expandedfunc(int x) In other words, func is a delegate which represents a function taking an int argument and returning a string. func is often used in LINQ, both for projections and predicates (in the latter case, TResult is always bool). For example, you could use a func to project a sequence of

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c# - Func delegate with no return type - Stack Overflow

WEBMay 27, 2009 — 62. All of the func delegates take at least one parameter. That's not true. They all take at least one type argument, but that argument determines the return type. So func accepts no parameters and returns a value. Use Action or Action when you don't want to return a value. answered May 27, 2009 at 19:23.

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Difference between Expression> and Func<> - Stack …

WEBApr 19, 2010 — An Expression<func<>> is the representation of a function that has yet to be turned into code. A func<> is an actual executable function. Using the former allows you to turn the expression into the appropriate function at the time that it is invoked. For example, with LINQ to SQL this will translate it into a the equivalent code to execute a

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