How to sum array of numbers in Ruby?

Try this:

array.inject(0){|sum,x| sum + x }

See Ruby’s Enumerable Documentation

(note: the 0 base case is needed so that 0 will be returned on an empty array instead of nil)

Related Posts:

  1. What does %w(array) mean?
  2. Array to Hash Ruby
  3. Ruby: undefined method `[]’ for nil:NilClass when trying to get Enumerator on an Array of Hashes
  4. How to map with index in Ruby?
  5. Ruby array to string conversion
  6. How to check if a value exists in an array in Ruby
  7. What is the “right” way to iterate through an array in Ruby?
  8. Difference between map and collect in Ruby?
  9. Creating and iterating a 2d array in Ruby
  10. What is the best way to convert an array to a hash in Ruby
  11. How can I delete one element from an array by value
  12. Get underlined text with Markdown
  13. What is the meaning of *nix?
  14. Get underlined text with Markdown
  15. What does the “map” method do in Ruby?
  16. How to write a switch statement in Ruby
  17. Rails 5 ActionController::InvalidAuthenticityToken error
  18. what does ? ? mean in ruby
  19. How to update Ruby Version 2.0.0 to the latest version in Mac OSX Yosemite?
  20. How to use “gets” and “gets.chomp” in Ruby
  21. Getting a substring in Ruby by x number of chars
  22. How to check whether a string contains a substring in Ruby
  23. Ruby: How to install a specific version of a ruby gem?
  24. ruby operator “=~” [duplicate]
  25. What does << mean in Ruby?
  26. What is attr_accessor in Ruby?
  27. ActionController::UnknownFormat
  28. What does ||= (or-equals) mean in Ruby?
  29. How to read lines of a file in Ruby
  30. Ruby equivalent for Python’s “try”?
  31. What does “+=” (plus equals) mean?
  32. Rails 4 RoutingError: No Route Matches
  33. undefined method (NoMethodError) ruby
  34. Multi-Line Comments in Ruby?
  35. How to uninstall ruby installed by ruby-install
  36. PG::ConnectionBad – could not connect to server: Connection refused
  37. Rails syntax error : unexpected keyword_ensure, expecting end-of-input
  38. Removing all installed Gems and starting over
  39. Ruby `send` vs `call` method
  40. What is the meaning of “do | |” in Ruby?
  41. RVM is not a function, selecting rubies with ‘rvm use …’ will not work
  42. How to delete specific characters from a string in Ruby?
  43. Ruby: kind_of? vs. instance_of? vs. is_a?
  44. Rails: I installed Ruby, now “bundle install” doesn’t work
  45. How to do a newline in output
  46. Ruby: What is the easiest way to remove the first element from an array?
  47. Ruby String to Date Conversion
  48. p vs puts in Ruby
  49. Determining type of an object in ruby
  50. Fizz Buzz in Ruby for dummies
  51. How to Uninstall RVM? [duplicate]
  52. What is the difference between a Process’ pid, ppid, uid, euid, gid and egid?
  53. Equivalent of “continue” in Ruby
  54. What does the Ruby method ‘to_sym’ do?
  55. Array to Hash Ruby
  56. Ruby 2.0.0p0 IRB warning: “DL is deprecated, please use Fiddle”
  57. Getting error: dyld: Symbol not found: _clock_gettime
  58. Uninstall old versions of Ruby gems
  59. Uploading a file in Rails
  60. What is java interface equivalent in Ruby?
  61. Sort hash by key, return hash in Ruby
  62. Gem installation error: You have to install development tools first
  63. How to understand strptime vs. strftime
  64. How to break out from a ruby block?
  65. ERROR: While executing gem … (Gem::FilePermissionError)
  66. No such file or directory @ rb_sysopen ruby
  67. How to add to an existing hash in Ruby
  68. Ruby ‘require’ error: cannot load such file
  69. How to convert a string to lower or upper case in Ruby
  70. What is the canonical way to trim a string in Ruby without creating a new string?
  71. Difference between $stdout and STDOUT in Ruby
  72. No implicit conversion of String into Integer (TypeError)?
  73. Multi-Line Comments in Ruby?
  74. In a triangulated isometric grid, what triangle is a given point in?
  75. What’s the difference between “{}” and “[]” while declaring a JavaScript array?
  76. Converting bytes to megabytes
  77. How to declare an array in Python?
  78. Why prefer two’s complement over sign-and-magnitude for signed numbers?
  79. For-each over an array in JavaScript
  80. 1000 * 60 * 60 * 24 * 30 results in a negative number [duplicate]
  81. How to append something to an array?
  82. TypeError: list indices must be integers or slices, not str
  83. Sorting an array of objects by property values
  84. How can I remove a specific item from an array?
  85. How do I check if an array includes a value in JavaScript?
  86. Converting 3D polar coordinates to cartesian coordinates
  87. How to dynamically allocate arrays in C++
  88. How to dynamically allocate arrays in C++
  89. ValueError: setting an array element with a sequence
  90. Difference between “as $key => $value” and “as $value” in PHP foreach
  91. What is the C++ function to raise a number to a power?
  92. How do I determine whether an array contains a particular value in Java?
  93. Unfamiliar symbol in algorithm: what does ∀ mean? [closed]
  94. How to initialize an array in Java?
  95. Initialize part of an array in java
  96. How do I find the length of an array?
  97. Python Math – TypeError: ‘NoneType’ object is not subscriptable
  98. numpy max vs amax vs maximum
  99. TypeError: only size-1 arrays can be converted to Python scalars (matplotlib)
  100. Loop through an array in JavaScript

Leave a Comment

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)