21. Create a method that returns the last element of an array.
Required Input:
[10, 20, 30, 40, 50]Expected Output:
50
Code In Ruby
# Predefined array
array = [10, 20, 30, 40, 50]
# Your logic here
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22. Write a program that removes all nil values from an array.
Required Input:
[1, nil, 2, 3, nil, 4]Expected Output:
1
2
3
4
Code In Ruby
# Predefined array
array = [1, nil, 2, 3, nil, 4]
# Your logic here
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23. Create a method to find the common elements between two arrays.
Required Input:
Array1: [1, 2, 3], Array2: [2, 3, 4]Expected Output:
2
3
Code In Ruby
# Predefined arrays
array1 = [1, 2, 3]
array2 = [2, 3, 4]
# Your logic here
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24. Write a program that converts a hash to an array of key-value pairs.
Required Input:
{a: 1, b: 2, c: 3}Expected Output:
[[:a, 1], [:b, 2], [:c, 3]]
Code In Ruby
# Predefined hash
hash = {a: 1, b: 2, c: 3}
# Your logic here
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25. Write a Ruby program to calculate the length of a string.
Required Input:
"programming"Expected Output:
11
Code In Ruby
# Predefined string
string = "programming"
# Your logic here
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26. Create a method to find all prime numbers up to a given number.
Required Input:
10Expected Output:
[2, 3, 5, 7]
Code In Ruby
# Predefined number
n = 10
# Your logic here
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27. Write a program to check if two strings are anagrams.
Required Input:
String1: "listen", String2: "silent"Expected Output:
true
Code In Ruby
# Predefined strings
string1 = "listen"
string2 = "silent"
# Your logic here
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28. Create a method to remove all non-alphabetic characters from a string.
Required Input:
"hello@world!123"Expected Output:
helloworld
Code In Ruby
# Predefined string
string = "hello@world!123"
# Your logic here
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29. Write a Ruby program to find the maximum and minimum values in a hash.
Required Input:
{a: 10, b: 20, c: 5, d: 15}Expected Output:
Maximum: 20
Minimum: 5
Code In Ruby
# Predefined hash
hash = {a: 10, b: 20, c: 5, d: 15}
# Your logic here
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30. Write a method to check if all elements in an array are unique.
Required Input:
[1, 2, 3, 4, 5]Expected Output:
true
Code In Ruby
# Predefined array
array = [1, 2, 3, 4, 5]
# Your logic here
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