Books by DeepText

Andrew Shitov

Using Perl 6


Andrew Shitov. Using Perl 6.

100 Programming Challenges Solved with the Perl 6 Programming Language

Programming languages series
Published by DeepText
Amsterdam, November 2017
ISBN 978-90-821568-1-2
Feedback: mail@deeptext.media

This book is a collection of different programming challenges and solutions in Perl 6. It can be used as an exercise book, when you are learning Perl 6, or as a reference book when you are teaching it.

It is assumed that the reader knows the basics of Perl 6 and wants to have some practice.

In this book, you will find 100 solutions of different common programming challenges that are written in Perl 6. Once you already know some of the basics of the language, it is a good idea to spend some time trying to do some exercises and the most popular tasks, which will vary from displaying the ‘Hello, World!’ greeting, to creating a parser for the command-line calculator.

The seven chapters are divided into two parts, which cover the essential parts of Perl; firstly, the strings, numbers, and aggregate data structures, and secondly, of Perl 6 in particular, namely, the new regexes, grammars, and parallel computing.

Each of the 100 tasks presented in the book demonstrates the main idea of how to approach a problem; big chunks of code are avoided, as much as possible.

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100
challenges
180
pages
6.c
modern Perl 6

Chapter 1. Strings

Using strings ~ Modifying string data ~ Text analysis

Chapter 2. Numbers

Using numbers ~ Random numbers ~ Mathematical problems ~ Numbers and strings

Chapter 3. Aggregate Data Types

Manipulating lists and arrays ~ Information retrieval ~ Working with subroutines ~ Multi-dimensional data

Chapter 4. Regexes and Grammars

Regex matching ~ Substitutions with regexes ~ Using grammars

Chapter 5. Date and Time

Current date and time ~ Formatted date ~ Datetime arithmetic

Chapter 6. Parallel Computing

Setting timeouts ~ Atomic operations ~ Parallel file processing

Chapter 7. Miscellaneous

Reading directory content ~ The cat utility ~ Brainfuck interpreter

Table of Contents

Chapter 1.
Strings
1.1. Using strings
1. Hello, World!
2. Greet a person
3. String length
4. Unique digits
1.2. Modifying string data
5. Reverse a string
6. Removing blanks from a string
7. Camel case
8. Incrementing filenames
9. Random passwords
10. DNA-to-RNA transcription
11. Caesar cipher
1.3. Text analysis
12. Plural endings
13. The most frequent word
14. The longest common substring
15. Anagram test
16. Palindrome test
17. The longest palindrome
18. Finding duplicate texts
Chapter 2.
Numbers
2.1. Using numbers
19. π
20. Factorial!
21. Fibonacci numbers
22. Print squares
23. Powers of two
24. Odd and even numbers
25. Compare numbers approximately
26. Multiplying big numbers
27. Prime numbers
28. List of prime numbers
29. Prime factors
30. Reducing a fraction
31. Divide by zero
2.2. Random numbers
32. Generating random numbers
33. Neumann’s random generator
34. Histogram of random numbers
2.3. Mathematical problems
35. Distance between two points
36. Standard deviation
37. Polar coordinates
38. Monte Carlo method
2.4. Numbers and strings
39. Unicode digits
40. Guess the number
41. Binary to integer
42. Integer as binary, octal, and hex
43. Sum of digits
44. Bit counter
45. Compose the largest number
46. Convert to Roman numerals
47. Spelling numbers
Chapter 3.
Aggregate Data Types
3.1. Manipulating lists and arrays
48. Swap two values
49. Reverse a list
50. Rotate a list
51. Randomise an array
52. Incrementing array elements
53. Adding up two arrays
54. Exclusion of two arrays
3.2. Information retrieval
55. Sum of the elements of an array
56. Average of an array
57. Moving average
58. Is an element in a list?
59. First odd number
60. Take every second element
61. Number of occurrences in array
62. Finding unique elements
63. Minimum and maximum
64. Increasing sequences
3.3. Working with subroutines
65. Passing arrays to subroutines
66. Variadic parameters in a sub
3.4. Multi-dimensional data
67. Transpose a matrix
68. Sort hashes by parameter
69. Count hash values
70. Product table
71. Pascal triangle
Chapter 4.
Regexes and Grammars
4.1. Regex matching
72. Count vowels in a word
73. Count words
74. Skipping Pod documentation
75. Currency converter
4.2. Substitutions with regexes
76. Double each character
77. Remove duplicated words
78. Separate digits and letters
79. Separate groups of digits
80. Increase digits by one
81. Pig Latin
82. Simple string compressor
83. %Templating% engine
4.3. Using grammars
84. Decode Roman numerals
85. Balanced parentheses
86. Basic calculator
Chapter 5.
Date and Time
87. Current date and time
88. Formatted date
89. Datetime arithmetic
90. Leap years
Chapter 6.
Parallel Computing
91. Setting timeouts
92. Sleep Sort
93. Atomic operations
94. Parallel file processing
Chapter 7.
Miscellaneous
95. The cat utility
96. The uniq utility
97. Reading directory content
98. Text to Morse code
99. Morse to text
100. Brainfuck interpreter

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