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Intended specifically for cases like these, the comparable constraint is predeclared in Go. It allows any type whose values may be used as an operand of the comparison operators == and !=. Go requires that map keys be comparable. So declaring K as comparable is necessary so you can use K as the key in the map variable.
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Tutorial: Getting started with generics - The Go Programming Language
e brackets), K and V, and one argument that uses the type parameters, m of type map[K]V. The function returns a value of type V. Specify for the K type parameter the type constraint comparable. <span>Intended specifically for cases like these, the comparable constraint is predeclared in Go. It allows any type whose values may be used as an operand of the comparison operators == and !=. Go requires that map keys be comparable. So declaring K as comparable is necessary so you can use K as the key in the map variable. It also ensures that calling code uses an allowable type for map keys. Specify for the V type parameter a constraint that is a union of two types: int64 and float64. Using | specifies a


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