in hashfunction
i am not understand
what is meaning of t_size and operator()()
and const function ?
Unordered map for student custom class
@khemchandrs
a) size_t is alias for unsigned long long - > https://www.geeksforgeeks.org/size_t-data-type-c-language/
b) const is keyword in c++ that we use with variable if we want to fix its value (i.e we dont want anyone ,any function to chanage its value)
c) operator () (){ SOMETHING} is operator overloading here we are overloading () operator . -> https://www.geeksforgeeks.org/operator-overloading-c/
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