Introduction to Maps with SARL

• 1. Exercise 1
• 2. Exercise 2
• 3. Exercise 3
• 4. Exercise 4
• 5. Exercise 5
• 6. Exercise 6
• 7. Exercise 7
• 8. Exercise 8
• 9. Exercise 9
• 10. Exercise 10
• 11. Exercise 11
• 12. Exercise 12
• 13. Exercise 13
• 14. Exercise 14
• 15. Exercise 15
• 16. Exercise 16
• 17. Exercise 17
• 18. Exercise 18
• 19. Exercise 19
• 20. Exercise 20
• 21. Exercise 21
• 22. Exercise 22
• 23. Exercise 23
• 24. Exercise 24
• 25. Exercise 25
• 26. Exercise 26
• 27. Exercise 27
• 28. Exercise 28
• 29. Exercise 29
• 30. Exercise 30
• 31. Exercise 31
• 32. Exercise 32
• 33. Exercise 33
• 34. Exercise 34
• 35. Exercise 35
• 36. Exercise 36
• 37. Exercise 37
• 38. Exercise 38
• 39. Exercise 39
• 40. Exercise 40
• 41. Exercise 41
• 42. Exercise 42
• 43. Exercise 43
• 44. Exercise 44
• 45. Exercise 45
• 46. Exercise 46
• 47. Exercise 47
• 48. Exercise 48
• 49. Exercise 49
• 50. Exercise 50
• 51. Exercise 51
• 52. Exercise 52
• 53. Exercise 53
• 54. Exercise 54
• 55. Exercise 55
• 56. Exercise 56
• 57. Exercise 57
• 58. Exercise 58
• 59. Exercise 59
• 60. Exercise 60
• 61. Legal Notice

Note 1 In SARL, a map is a data structure that is also known as dictionary in other programming languages. This type of data structure maps keys to values.

Note 2 If you don’t know how to solve an problem, or what is the function to be used, you could search on Internet for the answer using the API of the Java programming language. Indeed, since SARL is fully compatible with the Java API, you could use all the types or functions that are defined in this Java API.

1. Exercise 1

Write a SARL script to sort (ascending and descending) a map by value.

Solution

2. Exercise 2

Write a SARL script to add a key to a map.

• Sample Map: {0: 10, 1: 20}
• Expected Result: {0: 10, 1: 20, 2: 30}

Solution

3. Exercise 3

Write a SARL script to concatenate the following maps to create a new one.

• Sample Maps:

dic1={1:10, 2:20}
dic2={3:30, 4:40}
dic3={5:50,6:60}

• Expected Result : {1: 10, 2: 20, 3: 30, 4: 40, 5: 50, 6: 60}

Solution

4. Exercise 4

Write a SARL script to check whether a given key already exists in a map.

Solution

5. Exercise 5

Write a SARL program to iterate over maps using for loops.

Solution

6. Exercise 6

Write a SARL script to generate and print a map that contains a number (between 1 and n) in the form (x, x*x).

• n = 5
• Expected Output: {1: 1, 2: 4, 3: 9, 4: 16, 5: 25}

Solution

7. Exercise 7

Write a SARL script to print a map where the keys are numbers between 1 and 15 (both included) and the values are the square of the keys.

• Sample map: {1: 1, 2: 4, 3: 9, 4: 16, 5: 25, 6: 36, 7: 49, 8: 64, 9: 81, 10: 100, 11: 121, 12: 144, 13: 169, 14: 196, 15: 225}

Solution

8. Exercise 8

Write a SARL script to merge two SARL maps.

Solution

9. Exercise 9

Write a SARL program to sum all the values in a maps.

Solution

10. Exercise 10

Write a SARL program to multiply all the values in a map.

Solution

11. Exercise 11

Write a SARL program to remove a key from a map.

Solution

12. Exercise 12

Write a SARL program to map two lists into a map.

Solution

13. Exercise 13

Write a SARL program to sort a given map by key.

Solution

14. Exercise 14

Write a SARL program to get the maximum and minimum values of a map.

Solution

15. Exercise 15

Write a SARL program to remove duplicated values from the map.

Solution

16. Exercise 16

Write a SARL program to check if a map is empty or not.

Solution

17. Exercise 17

Write a SARL program to combine two maps by adding values for common keys.

• Inputs:

d1 = {'a': 100, 'b': 200, 'c':300}
d2 = {'a': 300, 'b': 200, 'd':400}

• Sample output: {'a': 400, 'b': 400, 'd': 400, 'c': 300}

Solution

18. Exercise 18

Write a SARL program to print all distinct values in a map.

• Sample Data : [{"V":"S001"}, {"V": "S002"}, {"VI": "S001"}, {"VI": "S005"}, {"VII":"S005"}, {"V":"S009"},{"VIII":"S007"}]
• Expected Output : {'S005', 'S002', 'S007', 'S001', 'S009'}

Solution

19. Exercise 19

Write a SARL program to create and display all combinations of letters, selecting each letter from a different key in a map.

• Sample data: {'1':['a','b'], '2':['c','d']}
• Expected Output:

ac
ad
bc
bd

Solution

20. Exercise 20

Write a SARL program to find the highest 3 values of corresponding keys in a map.

Solution

21. Exercise 21

Write a SARL program to combine values in a list of maps.

• Sample data: [{'item': 'item1', 'amount': 400}, {'item': 'item2', 'amount': 300}, {'item': 'item1', 'amount': 750}]
• Expected Output: {'item1': 1150, 'item2': 300}

Solution

22. Exercise 22

Write a SARL program to create a map from a string. Track the count of the letters from the string.

• Sample string: w3resource
• Expected output: {'w': 1, '3': 1, 'r': 2, 'e': 2, 's': 1, 'o': 1, 'u': 1, 'c': 1}

Solution

23. Exercise 23

Write a SARL program to print a map in table format.

• Sample Input:

{1: ["Samuel", 21, 'Data Structures'],
 2: ["Richie", 20, 'Machine Learning'],
 3: ["Lauren", 21, 'OOPS with java'],
}

• Expected Output:

Samuel	21	Data Structures
Richie	20	Machine Learning
Lauren	21	OOPS with java

Solution

24. Exercise 24

Write a SARL program to sort a list alphabetically in a map.

• Sample Input: {'n1': [2, 3, 1], 'n2': [5, 1, 2], 'n3': [3, 2, 4]}
• Expected Output: {'n1': [1, 2, 3], 'n2': [1, 2, 5], 'n3': [2, 3, 4]}

Solution

25. Exercise 25

Write a SARL program to remove spaces from map keys.

Solution

26. Exercise 26

Write a SARL program to get the top three items in a shop.

• Sample data: {'item1': 45.50, 'item2':35, 'item3': 41.30, 'item4':55, 'item5': 24}
• Expected Output:

item4 55
item1 45.5
item3 41.3

Solution

27. Exercise 27

Write a SARL program to get the key, value and item in a map.

Solution

28. Exercise 28

Write a SARL program to print a map line by line.

Solution

29. Exercise 29

Write a SARL program to count the number of items in a map value that is a list.

Solution

30. Exercise 30

Write a SARL program to sort items by value in reverse order.

• Sample data: {'Math':81, 'Physics':83, 'Chemistry':87}
• Expected data: [('Chemistry', 87), ('Physics', 83), ('Math', 81)]

Solution

31. Exercise 31

Write a SARL program to create a map from two lists without losing duplicate values.

• Sample lists: ['Class-V', 'Class-VI', 'Class-VII', 'Class-VIII'] and [1, 2, 2, 3]
• Expected Output: {'Class-V': {1}, 'Class-VI': {2}, 'Class-VII': {2}, 'Class-VIII': {3}}

Solution

32. Exercise 32

Write a SARL program to match key values in two dictionaries.

• Sample maps: {'key1': 1, 'key2': 3, 'key3': 2} and {'key1': 1, 'key2': 2}
• Expected output: {'key1': 1} is present in both input maps

Solution

33. Exercise 33

Write a SARL program to store map data in a JSON file.

• Original map:

{'students': [{'firstName': 'Nikki', 'lastName': 'Roysden'}, {'firstName': 'Mervin', 'lastName': 'Friedland'}, {'firstName': 'Aron ', 'lastName': 'Wilkins'}], 'teachers': [{'firstName': 'Amberly', 'lastName': 'Calico'}, {'firstName': 'Regine', 'lastName': 'Agtarap'}]}

• Json file:

{'students': [{'firstName': 'Nikki', 'lastName': 'Roysden'}, {'firstName': 'Mervin', 'lastName': 'Friedland'}, {'firstName': 'Aron ', 'lastName': 'Wilkins'}], 'teachers': [{'firstName': 'Amberly', 'lastName': 'Calico'}, {'firstName': 'Regine', 'lastName': 'Agtarap'}]}

Solution

34. Exercise 34

Write a SARL program to create a map of keys x, y, and z where each key has as value a list from 11-20, 21-30, and 31-40 respectively. Access the fifth value of each key from the map.

{'x': [11, 12, 13, 14, 15, 16, 17, 18, 19, 20],
'y': [21, 22, 23, 24, 25, 26, 27, 28, 29, 30],
'z': [31, 32, 33, 34, 35, 36, 37, 38, 39, 40]}
15
25
35
x has value [11, 12, 13, 14, 15, 16, 17, 18, 19, 20]
y has value [21, 22, 23, 24, 25, 26, 27, 28, 29, 30]
z has value [31, 32, 33, 34, 35, 36, 37, 38, 39, 40]

Solution

35. Exercise 35

Write a SARL program to drop empty items from a given map.

• Original Map: {'c1': 'Red', 'c2': 'Green', 'c3': null}
• New map after dropping empty items: {'c1': 'Red', 'c2': 'Green'}

Solution

36. Exercise 36

Write a SARL program to filter a map based on values.

• Original Map: {'Cierra Vega': 175, 'Alden Cantrell': 180, 'Kierra Gentry': 165, 'Pierre Cox': 190}
• Marks greater than 170: {'Cierra Vega': 175, 'Alden Cantrell': 180, 'Pierre Cox': 190}

Solution

37. Exercise 37

Write a SARL program to convert more than one list to a nested map.

• Original strings: ['S001', 'S002', 'S003', 'S004'], and ['Adina Park', 'Leyton Marsh', 'Duncan Boyle', 'Saim Richards'], and [85, 98, 89, 92]
• Nested map: [{'S001': {'Adina Park': 85}}, {'S002': {'Leyton Marsh': 98}}, {'S003': {'Duncan Boyle': 89}}, {'S004': {'Saim Richards': 92}}]

Solution

38. Exercise 38

Write a SARL program to filter the height and width of students, which are stored in a map.

• Original Map: {'Cierra Vega': (6.2, 70), 'Alden Cantrell': (5.9, 65), 'Kierra Gentry': (6.0, 68), 'Pierre Cox': (5.8, 66)}
• Height > 6ft and Weight> 70kg: {'Cierra Vega': (6.2, 70)}

Solution

39. Exercise 39

Write a SARL program to verify that all values in a map are the same.

• Original Map: {'Cierra Vega': 12, 'Alden Cantrell': 12, 'Kierra Gentry': 12, 'Pierre Cox': 12}
• Check all are 12 in the map: true
• Check all are 10 in the map: false

Solution

40. Exercise 40

Write a SARL program to create a map grouping a sequence of key-value pairs into a map of lists.

• Original list: [('yellow', 1), ('blue', 2), ('yellow', 3), ('blue', 4), ('red', 1)]
• Grouping a sequence of key-value pairs into a map of lists: {'yellow': [1, 3], 'blue': [2, 4], 'red': [1]}

Solution

41. Exercise 41

Write a SARL program to split a given map of lists into lists of maps.

• Original map of lists: {'Science': [88, 89, 62, 95], 'Language': [77, 78, 84, 80]}
• Split said map of lists into list of dictionaries: [{'Science': 88, 'Language': 77}, {'Science': 89, 'Language': 78}, {'Science': 62, 'Language': 84}, {'Science': 95, 'Language': 80}]

Solution

42. Exercise 42

Write a SARL program to remove a specified map from a given list.

• Original list of map: [{'id': '#FF0000', 'color': 'Red'}, {'id': '#800000', 'color': 'Maroon'}, {'id': '#FFFF00', 'color': 'Yellow'}, {'id': '#808000', 'color': 'Olive'}]
• Remove id #FF0000 from the said list of map: [{'id': '#800000', 'color': 'Maroon'}, {'id': '#FFFF00', 'color': 'Yellow'}, {'id': '#808000', 'color': 'Olive'}]

Solution

43. Exercise 43

Write a SARL program to convert string values of a given map into integer/float datatypes.

• Original list: [{'x': '10', 'y': '20', 'z': '30'}, {'p': '40', 'q': '50', 'r': '60'}]
• String values of a given map, into integer types: [{'x': 10, 'y': 20, 'z': 30}, {'p': 40, 'q': 50, 'r': 60}]
• Original list: [{'x': '10.12', 'y': '20.23', 'z': '30'}, {'p': '40.00', 'q': '50.19', 'r': '60.99'}]
• String values of a given map, into float types: [{'x': 10.12, 'y': 20.23, 'z': 30.0}, {'p': 40.0, 'q': 50.19, 'r': 60.99}]

Solution

44. Exercise 44

A SARL map contains List as a value. Write a SARL program to clear the list values in the said map.

• Original Map: {'C1': [10, 20, 30], 'C2': [20, 30, 40], 'C3': [12, 34]}
• Clear the list values in the said map: {'C1': [], 'C2': [], 'C3': []}

Solution

45. Exercise 45

A SARL map contains List as a value. Write a SARL program to update the list values in the said map by adding 1 to the scores in Math and substracting 2 to the scores in Physics

• Original Map: {'Math': [88, 89, 90], 'Physics': [92, 94, 89], 'Chemistry': [90, 87, 93]}
• Update the list values of the said map: {'Math': [89, 90, 91], 'Physics': [90, 92, 87], 'Chemistry': [90, 87, 93]}

Solution

46. Exercise 46

Write a SARL program to extract a list of values from a given list of maps.

• Original Map: [{'Math': 90, 'Science': 92}, {'Math': 89, 'Science': 94}, {'Math': 92, 'Science': 88}]
• Extract a list of values from said list of maps where subject = Science: [92, 94, 88]
• Original Map: [{'Math': 90, 'Science': 92}, {'Math': 89, 'Science': 94}, {'Math': 92, 'Science': 88}]
• Extract a list of values from said list of maps where subject = Math: [90, 89, 92]

Solution

47. Exercise 47

Write a SARL program to find the length of a map of values.

• Original Map: {1: 'red', 2: 'green', 3: 'black', 4: 'white', 5: 'black'}
• Length of map values: {'red': 3, 'green': 5, 'black': 5, 'white': 5}
• Original Map: {'1': 'Austin Little', '2': 'Natasha Howard', '3': 'Alfred Mullins', '4': 'Jamie Rowe'}
• Length of map values: {'Austin Little': 13, 'Natasha Howard': 14, 'Alfred Mullins': 14, 'Jamie Rowe': 10}

Solution

48. Exercise 48

Write a SARL program to get the depth of a map.

Solution

49. Exercise 49

Write a SARL program to access map key’s element by index.

• Sample Input: {'physics': 80, 'math': 90, 'chemistry': 86}
• Expected Output:

0 = physics
1 = math
2 = chemistry

Solution

50. Exercise 50

Write a SARL program to convert a map into a list of lists.

• Original Map: {1: 'red', 2: 'green', 3: 'black', 4: 'white', 5: 'black'}
• Convert the said map into a list of lists: [[1, 'red'], [2, 'green'], [3, 'black'], [4, 'white'], [5, 'black']]
• Original Map: {'1': 'Austin Little', '2': 'Natasha Howard', '3': 'Alfred Mullins', '4': 'Jamie Rowe'}
• Convert the said map into a list of lists: [['1', 'Austin Little'], ['2', 'Natasha Howard'], ['3', 'Alfred Mullins'], ['4', 'Jamie Rowe']]

Solution

51. Exercise 51

Write a SARL program to filter even numbers from a map of values.

• Original Map: {'V': [1, 4, 6, 10], 'VI': [1, 4, 12], 'VII': [1, 3, 8]}
• Filter even numbers from said map values: {'V': [4, 6, 10], 'VI': [4, 12], 'VII': [8]}
• Original Map: {'V': [1, 3, 5], 'VI': [1, 5], 'VII': [2, 7, 9]}
• Filter even numbers from said map values: {'V': [], 'VI': [], 'VII': [2]}

Solution

52. Exercise 52

Write a SARL program to get all combinations of key-value pairs in a given map.

• Original Map: {'V': [1, 4, 6, 10], 'VI': [1, 4, 12], 'VII': [1, 3, 8]}
• Combinations of key-value pairs of the said map: [{'V': [1, 4, 6, 10], 'VI': [1, 4, 12]}, {'V': [1, 4, 6, 10], 'VII': [1, 3, 8]}, {'VI': [1, 4, 12], 'VII': [1, 3, 8]}]
• Original Map: {'V': [1, 3, 5], 'VI': [1, 5]}
• Combinations of key-value pairs of the said map: [{'V': [1, 3, 5], 'VI': [1, 5]}]

Solution

53. Exercise 53

Write a SARL program to find the specified number of maximum values in a given map.

• Original Map: {'a': 5, 'b': 14, 'c': 32, 'd': 35, 'e': 24, 'f': 100, 'g': 57, 'h': 8, 'i': 100}
• 1 maximum value(s) in the said map: ['f']
• 2 maximum value(s) in the said map: ['f', 'i']
• 5 maximum value(s) in the said map: ['f', 'i', 'g', 'd', 'c']

Solution

54. Exercise 54

Write a SARL program to find the shortest list of values for the keys in a given map.

• Original Map: {'V': [10, 12], 'VI': [10], 'VII': [10, 20, 30, 40], 'VIII': [20], 'IX': [10, 30, 50, 70], 'X': [80]}
• Shortest list of values with the keys of the said map: ['VI', 'VIII', 'X']

Solution

55. Exercise 55

Write a SARL program to extract values from a given map and create a list of lists from those values.

• Original Map: [{'student_id': 1, 'name': 'Jean Castro', 'class': 'V'}, {'student_id': 2, 'name': 'Lula Powell', 'class': 'V'}, {'student_id': 3, 'name': 'Brian Howell', 'class': 'VI'}, {'student_id': 4, 'name': 'Lynne Foster', 'class': 'VI'}, {'student_id': 5, 'name': 'Zachary Simon', 'class': 'VII'}]
• Extract values from the said map and create a list of lists using those values:
  • For ['student_id', 'name', 'class']: [[1, 'Jean Castro', 'V'], [2, 'Lula Powell', 'V'], [3, 'Brian Howell', 'VI'], [4, 'Lynne Foster', 'VI'], [5, 'Zachary Simon', 'VII']]
  • For ['student_id', 'name']: [[1, 'Jean Castro'], [2, 'Lula Powell'], [3, 'Brian Howell'], [4, 'Lynne Foster'], [5, 'Zachary Simon']]
  • For ['name', 'class']: [['Jean Castro', 'V'], ['Lula Powell', 'V'], ['Brian Howell', 'VI'], ['Lynne Foster', 'VI'], ['Zachary Simon', 'VII']]

Solution

56. Exercise 56

Write a SARL program to convert a given list of lists to a map.

• Original list of lists: [[1, 'Jean Castro', 'V'], [2, 'Lula Powell', 'V'], [3, 'Brian Howell', 'VI'], [4, 'Lynne Foster', 'VI'], [5, 'Zachary Simon', 'VII']]
• Convert the said list of lists to a map: {1: ['Jean Castro', 'V'], 2: ['Lula Powell', 'V'], 3: ['Brian Howell', 'VI'], 4: ['Lynne Foster', 'VI'], 5: ['Zachary Simon', 'VII']}

Solution

57. Exercise 57

Write a SARL program that creates key-value list pairings within a map.

• Original map: {1: ['Jean Castro'], 2: ['Lula Powell'], 3: ['Brian Howell'], 4: ['Lynne Foster'], 5: ['Zachary Simon']}
• A key-value list pairings of the said map: [{1: 'Jean Castro', 2: 'Lula Powell', 3: 'Brian Howell', 4: 'Lynne Foster', 5: 'Zachary Simon'}]

Solution

58. Exercise 58

Write a SARL program to get the total length of all values in a given map with string values.

• Original map: {'#FF0000': 'Red', '#800000': 'Maroon', '#FFFF00': 'Yellow', '#808000': 'Olive'}
• Total length of all values of the said map with string values: 20

Solution

59. Exercise 59

Write a SARL program to check if a specific key and a value exist in a map.

• Original Map: [{'student_id': 1, 'name': 'Jean Castro', 'class': 'V'}, {'student_id': 2, 'name': 'Lula Powell', 'class': 'V'}, {'student_id': 3, 'name': 'Brian Howell', 'class': 'VI'}, {'student_id': 4, 'name': 'Lynne Foster', 'class': 'VI'}, {'student_id': 5, 'name': 'Zachary Simon', 'class': 'VII'}]

Solution

60. Exercise 60

Write a SARL program to invert a given map with non-unique hashable values.

• Sample Input: {'Ora Mckinney': 8, 'Theodore Hollandl': 7, 'Mae Fleming': 7, 'Mathew Gilbert': 8, 'Ivan Little': 7}
• Sample Output: {8: ['Ora Mckinney', 'Mathew Gilbert'], 7: ['Theodore Hollandl', 'Mae Fleming', 'Ivan Little']}

Solution

61. Legal Notice

• Specification: SARL General-purpose Agent-Oriented Programming Language (“Specification”)
• Version: 0.14
• Status: Draft Release
• Release: 2023-09-26

Copyright © 2014-2023 SARL.io, the Original Authors and Main Authors.

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Examples of SARL code are licensed under the Apache License, Version 2.0; you may not use this file except in compliance with the Apache License. You may obtain a copy of the Apache License.

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