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applicable

applicable(f, args...) -> Bool

Determine whether the given generic function has a method applicable to the given arguments.

julia> function f(x, y)
           x + y
       end;

julia> applicable(f, 1)
false

julia> applicable(f, 1, 2)
true

Examples

1. Check if function f is applicable to a single argument:

   julia> function f(x, y)
             x + y
         end;
   
   julia> applicable(f, 1)
   false

   In this example, the function f expects two arguments, but only one is provided. Therefore, it is not applicable.

2. Check if function f is applicable to multiple arguments:

   julia> applicable(f, 1, 2)
   true

   Here, the function f is applicable since it can accept two arguments.

Common mistake example:

julia> applicable(f, "hello", 2)
ERROR: MethodError: no method matching f(::String, ::Int64)

In this example, the function f does not have a method defined to handle a combination of a string and an integer. It's important to ensure that the arguments provided match the expected argument types for the function to avoid such errors.

See Also

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