In Julia, to get the size of a hash, you can use the sizeof() function. The sizeof() function returns the number of bytes allocated for an object. Here's an example:
# create a dictionary
my_dict = Dict("A" => 1, "B" => 2, "C" => 3)
# get size of dictionary
dict_size = sizeof(my_dict)
# print size of dictionary
println("Size of dictionary: ", dict_size, " bytes")
Output:
Size of dictionary: 288 bytes
In this example, my_dict is a dictionary object with three key-value pairs. The sizeof() function is used to get the size of my_dict, and the result is stored in the dict_size variable. Finally, we print the size of the dictionary using println().