├── README.md
└── main.ex


/README.md:
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1 | # intro-to-elixir


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/main.ex:
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  1 | ## Run Code in IEX (Interactive Elixir)
  2 | 
  3 | ## Numbers - Integers and Floats
  4 | 
  5 | 2 + 3
  6 | 3 * 4
  7 | 3 - 5
  8 | x = 10
  9 | ## 5.0
 10 | x / 2
 11 | 
 12 | # 255
 13 | 0xFF
 14 | 
 15 | 3.14159
 16 | 
 17 | 3.0e-2
 18 | 
 19 | div(5, 2)
 20 | rem(5, 2)
 21 | 
 22 | 99_999_999_999_999_999_999_999_999_999_999_999_999_999_123_871_293_871_902_387_102 +
 23 |   99_999_999_999_999_999_999_999_999_999_999_999_999_999_123_871_293_871_902_387_102
 24 | 
 25 | ## 1000000
 26 | 1_000_000
 27 | 
 28 | ## Atoms
 29 | 
 30 | :atoms
 31 | 
 32 | :"an atom"
 33 | 
 34 | :"12387 &*^#2"
 35 | 
 36 | var = :atom
 37 | 
 38 | ## Aliases
 39 | 
 40 | AModule
 41 | # true
 42 | :"Elixir.AModule" == AModlue
 43 | 
 44 | alias IO, as: MyIO
 45 | 
 46 | MyIO.puts("Hello" == IO.puts("Hello"))
 47 | 
 48 | ## Booleans and nil
 49 | 
 50 | true
 51 | false
 52 | true
 53 | false
 54 | 
 55 | # true
 56 | true == true
 57 | # true
 58 | false == false
 59 | 
 60 | true and false
 61 | true or false
 62 | not true
 63 | 
 64 | nil
 65 | nil
 66 | nil == nil
 67 | 
 68 | if 10 do
 69 |   IO.puts("true")
 70 | end
 71 | 
 72 | # prints true
 73 | 
 74 | if nil do
 75 |   IO.puts("true")
 76 | end
 77 | 
 78 | # get back nil
 79 | 
 80 | # short circuit
 81 | nil || false || 4 || true
 82 | true && 5
 83 | !5
 84 | nil && 5
 85 | true && 5 && nil && false
 86 | 
 87 | ## Tuples
 88 | 
 89 | cat = {"Jazzpurr", 12}
 90 | age = elem(cat, 1)
 91 | put_elem(cat, 1, 13)
 92 | cat = put_elem(cat, 1, 23)
 93 | 
 94 | ## Lists
 95 | 
 96 | numbers = [1, 2, 3, 4]
 97 | length(numbers)
 98 | Enum.at(numbers, 5)
 99 | Enum.at(numbers, 3)
100 | 3 in numbers
101 | 5 in numbers
102 | 
103 | List.replace_at(numbers, 0, 12)
104 | # [12, 2, 3, 4]
105 | List.insert_at(numbers, 3, 13)
106 | List.insert_at(numbers, -1, 13)
107 | 
108 | [1, 2, 3] ++ [4, 5]
109 | [head | tail] = [1, 2, 3, 4, 5, 6, 7]
110 | # head = 1
111 | # tail = [2, 3, 4, 5, 6, 7]
112 | 
113 | [1 | [2 | [3 | [4 | [5 | [6 | [7 | []]]]]]]]
114 | 
115 | hd(numbers)
116 | tl(numbers)
117 | 
118 | alist = [15, :atom, true]
119 | [:first | atlist]
120 | # [:first, 15, :atom, true]
121 | 
122 | ## Maps
123 | 
124 | empty = %{}
125 | sqrs = %{1 => 1, 2 => 4, 3 => 9}
126 | 
127 | sqrs[1]
128 | sqrs[2]
129 | 
130 | Map.get(sqrs, 3)
131 | Map.get(sqrs, 5)
132 | 
133 | cat = %{name: "Jazzpurr", age: 12}
134 | cat.age
135 | cat.name
136 | cat[:name]
137 | cat[:age]
138 | 
139 | older_cat = %{cat | age: 15}
140 | older_cat.age
141 | 
142 | ## Binaries and Bitstrings
143 | <<1, 2, 3>>
144 | # <<0>>
145 | <<256>>
146 | # <<1>>
147 | <<257>>
148 | <<256::16>>
149 | <<1::4, 15::4>>
150 | <<1, 2>> <> <<3, 4>>
151 | 
152 | ## Strings and Charlist
153 | "This is a String"
154 | "Add together #{3 + 4}"
155 | "\r \n \" \\"
156 | 
157 | ~s("This is a string!")
158 | ~S(This is a String!)
159 | 
160 | 'ABC' == [65, 66, 67]
161 | 'sum: #{3 + 5}'
162 | ~c(Character Sigil)
163 | # 'A String'
164 | String.to_charlist("A String")
165 | 


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