X$1293$: Compute hash key from string

Write a function that computes a hash key for a student ID$.$ The student ID is a String with the following format: $3$ digits, followed by a hyphen $(-),$ followed by $4$ more digits. However, ids are often written without the hyphen. So$,$ both of these IDs are valid and the same:

$800-12345$

$80012345$

Write a function that computes a hash key for the id passed as an argument. Remember that you can convert a String to a char array using the following line:

char digits$[]=$ id$.$toCharArray$()$;

Then you can loop through the digits array adding up each element. That produces a sum of the ASCII value of all the letters. Remember to skip $($i$.$e$.,$ don't add$)$ any character that is $\text{'}-\text{'}($hyphen$).$

This sum you can then use with a mod operation with the second argument size to get the hash key.

Return this hash key.

Examples:

hashKey$("834-1234",10)->1$

hashKey$("8341234",10)->1$

Your Answer:

public int hashKey$($String id$,$ int size$)$

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public int hashKey$($String id$,$ int size$)$

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