T first<T>(List<T> ts) {
// Do some initial work or error checking, then...
T tmp = ts[0];
// Do some additional checking or processing...
return tmp;
}
Here the generic type parameter on first (<T>) allows you to use the type argument T in several places: In the function’s return type (T); In the type of an argument (List<T>); In the type of a local variable (T tmp).
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