List of Crystal Kata to Update

NOTE: Simply remove the kata from the list after updating.

Crystal 1.0 was added, but the following are not compatible. Please help updating them.

---

Common fixes:

• Replace / with // (floored division)
• Refactor the fixed tests if it is assigning the same variable inside describe but outside it, e.g:

def square(n) n*n end

describe "Test" do
  n = 1
  it "{n}" do
    square(n).should eq 1
  end
  n = 5
  it "{n}" do
    square(n).should eq 25
  end
end

Would fail because it blocks are run asynchronously(?), hence when all it blocks are run they all receive the last n. Either put n inside it block or refactor the test into a list iteration:

def square(n) n*n end

describe "Test" do
  test_cases = [[1,1], [5,25]]
  test_cases.each do |(n, ex)|
    it "#{n}" do
      square(n).should eq ex
    end
  end
end

---

Many of the translations by one user have nested it, and apparently have been displaying a corrupted output for many years (these does have very low completions considering the age). Nested it is a compile error in newer Crystal. These are also poorly structured, lacks proper indents, and the reference solution is "one-liner". So, please consider improving them as well. If the reference solution is difficult to understand, and prevents upgrade, replace with a better one.

---

1. Alex & snooker: points earned.
2. Arrays and hex color codes
3. Balanced Number (Special Numbers Series #1 )
4. Basics 08: Find next higher number with same Bits (1's)
5. Binary operations #1
6. Bonuses
7. Boolean logic from scratch
8. Casino chips
9. Christmas baubles on the tree
10. Color Choice
11. Computer problem series #1: Fill the Hard Disk Drive
12. Consecutive k-Primes
13. Convert number to reversed array of digits
14. Correct the time-string
15. Creating a string for an array of objects from a set of words
16. Custom Christmas Tree
17. D&D Character generator #1: attribute modifiers and spells
18. D&D Character generator #2: psion power points
19. Dan's great power generator
20. Diamonds and Toads
21. Diophantine Equation
22. Disease Spread
23. Easy Diagonal
24. Elections: Weighted Average
25. Eliminate the intruders! Bit manipulation
26. Estimating Amounts of Subsets
27. Factorial decomposition
28. Fibonacci, Tribonacci and friends
29. Forth
30. Frank's Sticky Calculator
31. Generic numeric template formatter
32. Get the Middle Character
33. Getting along with Integer Partitions
34. Hello World - Without Strings
35. Help your fellow warrior!
36. How many e-mails we sent today?
37. How many numbers III?
38. Integers: Recreation One
39. Is my friend cheating?
40. k-Primes
41. Longest palindrome
42. Master your primes: sieve with memoization
43. Median fun fun
44. Mutate My Strings
45. New £5 notes collectors!
46. Ninety Nine Thousand Nine Hundred Ninety Nine
47. No ifs no buts
48. Number Format
49. Order of weight
50. Pair of gloves
51. Parametric to Rectangular Equation
52. Parsing JSON leaves
53. Password generator
54. Password System
55. PRNG: Linear Congruential Generator
56. Progressive Spiral Number Branch
57. Quadruple M
58. Queue time counter [hard core version]
59. Reducing by rules to get the result
60. Reducing by steps
61. Resistor Color Codes
62. Resistor Color Codes, Part 2
63. Return 1, 2, 3 randomly
64. SCHEDULE YOUR DA(RRA)Y
65. Scramblies
66. SHA-256 Cracker
67. Some Egyptian fractions
68. Statistics for an Athletic Association
69. String subpattern recognition III
70. Sum of a Sequence [Hard-Core Version]: overflows
71. Sum of differences between products and LCMs: overflows
72. Sum of Triangular Numbers: overflows
73. Target Date
74. To square(root) or not to square(root)
75. Tortoise racing
76. Tram Capacity
77. Tribonacci Sequence