Safe Lookup in Go

Given a map scores from names to scores and a name, return the score of name, or 0 when name isn't a key of scores.

Some names you look up aren't in the dictionary at all. They have no score, so the answer for them is 0.

Example 1:

Input: scores = {"Ana": 90, "Ben": 75, "Cara": 88}, name = "Ben"
Output: 75
Explanation: "Ben" is a key of scores, and its value is 75.

Example 2:

Input: scores = {"Ana": 90, "Ben": 75, "Cara": 88}, name = "Dan"
Output: 0
Explanation: "Dan" isn't a key of scores, so the answer is 0.

Example 3:

Input: scores = {}, name = "Ana"
Output: 0
Explanation: An empty dictionary has no keys at all.

Constraints:

• scores can be empty.
• Names are single words made of English letters, and the names in scores are all different.
• name matches a key only when it is spelled exactly the same, upper and lower case included: "ana" is not "Ana".
• Every score is between 0 and 100.