Simple dictionary in C++

If you are into optimization, and assuming the input is always one of the four characters, the function below might be worth a try as a replacement for the map:

char map(const char in)
{ return ((in & 2) ? '\x8a' - in : '\x95' - in); }

It works based on the fact that you are dealing with two symmetric pairs. The conditional works to tell apart the A/T pair from the G/C one (‘G’ and ‘C’ happen to have the second-least-significant bit in common). The remaining arithmetics performs the symmetric mapping. It’s based on the fact that a = (a + b) – b is true for any a,b.

Related Posts:

  1. What is C# equivalent of in C++?
  2. C++ Loop through Map
  3. How to find if a given key exists in a C++ std::map
  4. How can I print out C++ map values?
  5. Determine if map contains a value for a key?
  6. How exactly do lookup tables work and how to implement them?
  7. Google map that opens in a new window
  8. Is there a tool to get the GPS data from a WordPress blog on a map? [closed]
  9. How do I find the length of an array?
  10. C++ — expected primary-expression before ‘ ‘
  11. Using getline() with file input in C++
  12. lvalue required as left operand of assignment error when using C++
  13. g++ ld: symbol(s) not found for architecture x86_64
  14. Making my own toString() method on c++ struct
  15. Struct Constructor in C++?
  16. What is meant with “const” at end of function declaration? [duplicate]
  17. What’s the C++ version of Java’s ArrayList
  18. How can I solve the error LNK2019: unresolved external symbol – function?
  19. C++ Error: ISO C++ Forbids Comparison Between Pointer and Integer [-fpermissive]
  20. What are forward declarations in C++?
  21. Does a Java to C++ converter/tool exist?
  22. How to write C++ on Mac?
  23. C++ string to double conversion
  24. C++ Linked List Node with class
  25. ‘was not declared in this scope’ error
  26. Is there a function to copy an array in C/C++?
  27. C++ error: no matching constructor for initialization of
  28. Angular map. What is it?
  29. Why use string::iterator rather than index?
  30. C++ request for member ‘’ in ‘’, which is of non-class type ‘’
  31. Using O_RDWR vs O_RDONLY | O_WRONLY
  32. How to implement the factory method pattern in C++ correctly
  33. c++ array – expression must have a constant value
  34. getline() does not work if used after some inputs
  35. Passing a 2D array to a C++ function
  36. ‘typeid’ versus ‘typeof’ in C++
  37. Fatal error: iostream: No such file or directory in compiling C program using GCC
  38. Thread pooling in C++11
  39. What are the differences between struct and class in C++?
  40. What is ‘\0’ in C++?
  41. Generate random float between two floats
  42. What is std::move(), and when should it be used?
  43. How can I get list of values from dict?
  44. Undefined reference to class constructor, including .cpp file fixes
  45. Deleting a dynamically allocated 2D array
  46. How to add element to C++ array?
  47. Difference of keywords ‘typename’ and ‘class’ in templates?
  48. Quick Way to Implement Dictionary in C
  49. Error: Jump to case label in switch statement
  50. What does int & mean
  51. Split a string into an array in C++
  52. C++ Why Is There “Unknown Type” When Class Header is Included?
  53. Invalid conversion from “const char*” to “char” error [duplicate]
  54. Initializing a static std::map in C++
  55. C++ strings and pointers
  56. delete vs delete[] operators in C++
  57. What is the preferred way to include error messages in C++?
  58. How to Convert a C++ String to Uppercase
  59. C++ Fractions Class
  60. #pragma once vs include guards?
  61. Debug vs Release in CMake
  62. C++ Initializing a Global Array
  63. How to convert an ASCII char to its ASCII int value?
  64. Warning: non-static data member initializers only available with -std=c++11 or -std=gnu++11?
  65. C++ – pointer being freed was not allocated error
  66. Reference to non-static member function must be called
  67. Call to non-static member function without an object argument compiler error
  68. C++ compile time error: expected identifier before numeric constant
  69. How can I assign an array from an initializer list?
  70. I get this error: “glibc detected”
  71. Python Add to dictionary loop
  72. How can I get and use the header file in my C++ program?
  73. cin.eof() functionality
  74. Implementing a tree in C++
  75. Drawing Circle with OpenGL
  76. AttributeError: ‘str’ object has no attribute ‘items’
  77. Run-Time Check Failure #2 – Stack around the variable ‘foo’ was corrupted
  78. “vector” was not declared in this scope
  79. Converting string to ASCII
  80. got “cannot appear in a constant-expression” when using template
  81. C++ ostream and ofstream conversions
  82. C++ discards qualifiers
  83. What is the source of the data for the ProgramFiles, ProgramW6432Dir, ProgramFilesDir (x86), CommonProgramFiles environment variables?
  84. C++ : Exception occurred in script: basic_string::_S_construct NULL not valid
  85. Error: “expected primary-expression before int”
  86. C++ Error: Expected a type specifier
  87. Where to declare/define class scope constants in C++?
  88. Friend methods error
  89. Does WPF Work with C++?
  90. Multiple inputs on one line
  91. When to use a Map instead of a List in Java?
  92. Why do I get: -9223372036854775808
  93. Compiler error C4430: missing type specifier – int assumed [duplicate]
  94. ‘&’ : illegal operation on bound member function expression [duplicate]
  95. Multiple definitions of “Main”
  96. C# Dictionary get item by index
  97. Getting the error floating point exception: 8
  98. WordPress Google Maps
  99. Best way to show map of tagged posts?
  100. Add Google Map By Address

Leave a Comment