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-rw-r--r--elixir.html.markdown35
1 files changed, 20 insertions, 15 deletions
diff --git a/elixir.html.markdown b/elixir.html.markdown
index c0abc815..0a20e3df 100644
--- a/elixir.html.markdown
+++ b/elixir.html.markdown
@@ -2,6 +2,7 @@
language: elixir
contributors:
- ["Joao Marques", "http://github.com/mrshankly"]
+ - ["Dzianis Dashkevich", "https://github.com/dskecse"]
filename: learnelixir.ex
---
@@ -59,7 +60,7 @@ tail #=> [2,3]
# the tuples have different sizes.
# {a, b, c} = {1, 2} #=> ** (MatchError) no match of right hand side value: {1,2}
-# There's also binaries
+# There are also binaries
<<1,2,3>> # binary
# Strings and char lists
@@ -108,7 +109,7 @@ div(10, 2) #=> 5
# To get the division remainder use `rem`
rem(10, 3) #=> 1
-# There's also boolean operators: `or`, `and` and `not`.
+# There are also boolean operators: `or`, `and` and `not`.
# These operators expect a boolean as their first argument.
true and true #=> true
false or true #=> true
@@ -119,7 +120,6 @@ false or true #=> true
1 || true #=> 1
false && 1 #=> false
nil && 20 #=> nil
-
!true #=> false
# For comparisons we have: `==`, `!=`, `===`, `!==`, `<=`, `>=`, `<` and `>`
@@ -165,12 +165,12 @@ case {:one, :two} do
{:four, :five} ->
"This won't match"
{:one, x} ->
- "This will match and assign `x` to `:two`"
+ "This will match and bind `x` to `:two`"
_ ->
"This will match any value"
end
-# It's common practice to assign a value to `_` if we don't need it.
+# It's common to bind the value to `_` if we don't need it.
# For example, if only the head of a list matters to us:
[head | _] = [1,2,3]
head #=> 1
@@ -190,7 +190,7 @@ cond do
"But I will"
end
-# It is common to see a last condition equal to `true`, which will always match.
+# It is common to see the last condition equal to `true`, which will always match.
cond do
1 + 1 == 3 ->
"I will never be seen"
@@ -301,7 +301,7 @@ end
Recursion.sum_list([1,2,3], 0) #=> 6
# Elixir modules support attributes, there are built-in attributes and you
-# may also add custom attributes.
+# may also add custom ones.
defmodule MyMod do
@moduledoc """
This is a built-in attribute on a example module.
@@ -312,21 +312,24 @@ defmodule MyMod do
end
## ---------------------------
-## -- Records and Exceptions
+## -- Structs and Exceptions
## ---------------------------
-# Records are basically structures that allow you to associate a name with
-# a particular value.
-defrecord Person, name: nil, age: 0, height: 0
+# Structs are extensions on top of maps that bring default values,
+# compile-time guarantees and polymorphism into Elixir.
+defmodule Person do
+ defstruct name: nil, age: 0, height: 0
+end
-joe_info = Person.new(name: "Joe", age: 30, height: 180)
-#=> Person[name: "Joe", age: 30, height: 180]
+joe_info = %Person{ name: "Joe", age: 30, height: 180 }
+#=> %Person{age: 30, height: 180, name: "Joe"}
# Access the value of name
joe_info.name #=> "Joe"
# Update the value of age
-joe_info = joe_info.age(31) #=> Person[name: "Joe", age: 31, height: 180]
+older_joe_info = %{ joe_info | age: 31 }
+#=> %Person{age: 31, height: 180, name: "Joe"}
# The `try` block with the `rescue` keyword is used to handle exceptions
try do
@@ -394,5 +397,7 @@ self() #=> #PID<0.27.0>
* [Getting started guide](http://elixir-lang.org/getting_started/1.html) from [elixir webpage](http://elixir-lang.org)
* [Elixir Documentation](http://elixir-lang.org/docs/master/)
+* ["Programming Elixir"](https://pragprog.com/book/elixir/programming-elixir) by Dave Thomas
+* [Elixir Cheat Sheet](http://media.pragprog.com/titles/elixir/ElixirCheat.pdf)
* ["Learn You Some Erlang for Great Good!"](http://learnyousomeerlang.com/) by Fred Hebert
-* "Programming Erlang: Software for a Concurrent World" by Joe Armstrong
+* ["Programming Erlang: Software for a Concurrent World"](https://pragprog.com/book/jaerlang2/programming-erlang) by Joe Armstrong