Rust Hashmaps Exercises with Solutions and Explanations

Rust Hashmaps Exercises [10 exercises with solution and Explanation]

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1. Write a Rust program that creates an empty HashMap and inserts key-value pairs representing the names and ages of people.

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2. Write a Rust program that iterate over a HashMap and print each key-value pair.

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3. Write a Rust program that checks if a key exists in a HashMap and print a corresponding message.

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4. Write a Rust program that retrieves the value associated with a specific key from a HashMap and print it.

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5. Write a Rust program to update the value associated with a key in a HashMap and print the updated HashMap.

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6. Write a Rust program to remove a key-value pair from a HashMap and print the HashMap after removal.

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7. Write a Rust program that merges two HashMaps into one and print the resulting HashMap.

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8. Write a Rust program to count the frequency of characters in a string and store the result in a HashMap.

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9. Write a Rust program that creates a HashMap where the keys are strings and the values are vectors of integers, then add elements to the vectors based on certain conditions.

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10. Write a Rust program to convert a vector of tuples into a HashMap where the first element of each tuple is the key and the second element is the value.

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