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hashmap3: Use or_default

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mo8it
2024-10-17 14:49:07 +02:00
parent 0432e07864
commit f146553dea
2 changed files with 4 additions and 12 deletions
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rustlings-macros/info.toml
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@@ -575,12 +575,8 @@ https://doc.rust-lang.org/book/ch08-03-hash-maps.html#only-inserting-a-value-if-
name = "hashmaps3"
dir = "11_hashmaps"
hint = """
Hint 1: Use the `entry()` and `or_insert()` (or `or_insert_with()`) methods of
`HashMap` to insert the default value of `TeamScores` if a team doesn't
exist in the table yet.
Learn more in The Book:
https://doc.rust-lang.org/book/ch08-03-hash-maps.html#only-inserting-a-value-if-the-key-has-no-value
Hint 1: Use the `entry()` and `or_default()` methods of `HashMap` to insert the
default value of `TeamScores` if a team doesn't exist in the table yet.
Hint 2: If there is already an entry for a given key, the value returned by
`entry()` can be updated based on the existing value.