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  1. # Element Counter, den510, 6/2/17
  2. table = {"H" => "Hydrogen",
  3. 	"He" => "Helium",
  4. 	"Li" => "Lithium",
  5. 	"Be" => "Beryllium",
  6. 	"B" => "Boron",
  7. 	"C" => "Carbon",
  8. 	"N" => "Nitrogen",
  9. 	"O" => "Oxygen",
  10. 	"F" => "Fluorine",
  11. 	"Ne" => "Neon",
  12. 	"Na" => "Sodium",
  13. 	"Mg" => "Magnesium",
  14. 	"Al" => "Aluminium",
  15. 	"Si" => "Silicon",
  16. 	"P" => "Phosphorus",
  17. 	"S" => "Sulfur",
  18. 	"Cl" => "Chlorine",
  19. 	"Ar" => "Argon",
  20. 	"K" => "Potassium",
  21. 	"Ca" => "Calcium",
  22. 	"Sc" => "Scandium",
  23. 	"Ti" => "Titanium",
  24. 	"V" => "Vanadium",
  25. 	"Cr" => "Chromium",
  26. 	"Mn" => "Manganese",
  27. 	"Fe" => "Iron",
  28. 	"Co" => "Cobalt",
  29. 	"Ni" => "Nickel",
  30. 	"Cu" => "Copper",
  31. 	"Zn" => "Zinc",
  32. 	"Ga" => "Gallium",
  33. 	"Ge" => "Germanium",
  34. 	"As" => "Arsenic",
  35. 	"Se" => "Selenium",
  36. 	"Br" => "Bromine",
  37. 	"Kr" => "Krypton",
  38. 	"Rb" => "Rubidium",
  39. 	"Sr" => "Strontium",
  40. 	"Y" => "Yttrium",
  41. 	"Zr" => "Zirconium",
  42. 	"Nb" => "Niobium",
  43. 	"Mo" => "Molybdenum",
  44. 	"Tc" => "Technetium",
  45. 	"Ru" => "Ruthenium",
  46. 	"Rh" => "Rhodium",
  47. 	"Pd" => "Palladium",
  48. 	"Ag" => "Silver",
  49. 	"Cd" => "Cadmium",
  50. 	"In" => "Indium",
  51. 	"Sn" => "Tin",
  52. 	"Sb" => "Antimony",
  53. 	"Te" => "Tellurium",
  54. 	"I" => "Iodine",
  55. 	"Xe" => "Xenon",
  56. 	"Cs" => "Cesium",
  57. 	"Ba" => "Barium",
  58. 	"La" => "Lanthanum",
  59. 	"Ce" => "Cerium",
  60. 	"Pr" => "Praseodymium",
  61. 	"Nd" => "Neodymium",
  62. 	"Pm" => "Promethium",
  63. 	"Sm" => "Samarium",
  64. 	"Eu" => "Europium",
  65. 	"Gd" => "Gadolinium",
  66. 	"Tb" => "Terbium",
  67. 	"Dy" => "Dysprosium",
  68. 	"Ho" => "Holmium",
  69. 	"Er" => "Erbium",
  70. 	"Tm" => "Thulium",
  71. 	"Yb" => "Ytterbium",
  72. 	"Lu" => "Lutetium",
  73. 	"Hf" => "Hafnium",
  74. 	"Ta" => "Tantalum",
  75. 	"W" => "Tungsten",
  76. 	"Re" => "Rhenium",
  77. 	"Os" => "Osmium",
  78. 	"Ir" => "Iridium",
  79. 	"Pt" => "Platinum",
  80. 	"Au" => "Gold",
  81. 	"Hg" => "Mercury",
  82. 	"Tl" => "Thallium",
  83. 	"Pb" => "Lead",
  84. 	"Bi" => "Bismuth",
  85. 	"Po" => "Polonium",
  86. 	"At" => "Astatine",
  87. 	"Rn" => "Radon",
  88. 	"Fr" => "Francium",
  89. 	"Ra" => "Radium",
  90. 	"Ac" => "Actinium",
  91. 	"Th" => "Thorium",
  92. 	"Pa" => "Protactinium",
  93. 	"U" => "Uranium",
  94. 	"Np" => "Neptunium",
  95. 	"Pu" => "Plutonium",
  96. 	"Am" => "Americium",
  97. 	"Cm" => "Curium",
  98. 	"Bk" => "Berkelium",
  99. 	"Cf" => "Californium",
  100. 	"Es" => "Einsteinium",
  101. 	"Fm" => "Fermium",
  102. 	"Md" => "Mendelevium",
  103. 	"No" => "Nobelium",
  104. 	"Lr" => "Lawrencium",
  105. 	"Rf" => "Rutherfordium",
  106. 	"Db" => "Dubnium",
  107. 	"Sg" => "Seaborgium",
  108. 	"Bh" => "Bohrium",
  109. 	"Hs" => "Hassium",
  110. 	"Mt" => "Meitnerium",
  111. 	"Ds" => "Darmstadtium",
  112. 	"Rg" => "Roentgenium",
  113. 	"Cn" => "Copernicium",
  114. 	"Uut" => "Ununtrium",
  115. 	"Fl" => "Flerovium",
  116. 	"Uup" => "Ununpentium",
  117. 	"Lv" => "Livermorium",
  118. 	"Uus" => "Ununseptium",
  119. 	"Uuo" => "Ununoctium"
  120. }
  121.  
  122. def count_elements(input)
  123.     atoms, elements, e_num_scan, e_scan = {}, [], /([A-Z][a-z]{0,2})(\d?)/, /[A-Z][a-z]{0,2}\d?/
  124.     input.scan(/\([\w\d]+\)?\d*/).each do | molecule | # scanning for molecules
  125.         input.slice!(molecule) # Remove molecule from equation
  126.         molecule.scan(/\)(\d)/) # looking for multiplier
  127.         $1 == '' ? multiplier = 1 : multiplier = $1.to_i
  128.         molecule.scan(e_scan).each do |ely| # looking for elements in molecule
  129.             ely.scan(e_num_scan) # breaking up element into element and multiplier
  130.             $2 == '' ? elements << $1 + multiplier.to_s : elements << $1 + ($2.to_i * multiplier).to_s
  131.         end end
  132.     elements.concat input.scan(e_scan) # adding in the remaining elements
  133.     elements.each do | element |
  134.         element.scan(e_num_scan) # breaking element into element and number
  135.         $2 == '' ? num = 1 : num = $2.to_i
  136.         atoms.key?($1) ? atoms[$1] = atoms[$1] + num : atoms[$1] = num
  137.     end
  138.     return atoms
  139. end
  140.  
  141. ["CCl2F2", "NaHCO3", "C4H8(OH)2", "PbCl(NH3)2(COOH)2"].each do |formula|
  142.     puts '', formula, '-'*20
  143.     count_elements(formula).each do |key, value|
  144.         puts table[key].ljust(14) + ':' + value.to_s.rjust(5)
  145.     end end
Success #stdin #stdout 0.01s 28320KB
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CCl2F2
--------------------
Carbon        :    1
Chlorine      :    2
Fluorine      :    2

NaHCO3
--------------------
Sodium        :    1
Hydrogen      :    1
Carbon        :    1
Oxygen        :    3

C4H8(OH)2
--------------------
Oxygen        :    2
Hydrogen      :   10
Carbon        :    4

PbCl(NH3)2(COOH)2
--------------------
Nitrogen      :    2
Hydrogen      :    8
Carbon        :    2
Oxygen        :    4
Lead          :    1
Chlorine      :    1
https://ideone.com/bna8mK
language:
Ruby (ruby 2.5.5)
created:
7 years ago
visibility:
public

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