You need to start your tests inside an iex session – you can do that by running iex -S mix test. Then you can use IEx.pry inside your test: require IEx test “the truth” do one = 1 IEx.pry assert one + one == 2 end You’ll be asked if you want to allow prying …
In the words of Bill Clinton, “It depends upon what the meaning of the word ‘is’ is”. Well, ok, not really, but it does depend on what the meaning of the word “homoiconic” is. This term is sufficiently controversial that we no longer say that Julia is homoiconic – so you can decide for yourself whether …
Use &Module.function/arity to pass it, and .(…) to call it. For example: def my_hof(f) f.([1, 2, 3], &(&1 * 2)) end my_hof(&Enum.map/2)
You can prepend your variable name with @: defmodule MyModule do @my_favorite_number 13 end Here are the docs
To me, the if IS the equivalent of a ternary operator as it evaluates to a value which for various other languages it doesn’t. so x = if false, do: 1, else: 2 is basically x = false? 1 : 2 Not sure why Ruby adopted it ( if you are coming from Ruby ) …
I think I found a way to do the formatting, but it’s not ideal because I’m writing the formatting myself. Here is a potential solution: SELECT to_char (now()::timestamp at time zone ‘UTC’, ‘YYYY-MM-DD”T”HH24:MI:SS”Z”‘)
There are 5 ways to run only specific tests with Elixir run a single file with mix test path_to_your_tests/your_test_file.exs This will run all test defined in your_test_file.exs run a specific test from a specific test file by adding a colon and the line number of that test for example mix test path_to_your_tests/your_test_file.exs:12 will run the …
No, there is no way to test them via ExUnit. I personally avoid testing private functions because usually you end up testing implementation instead of behaviour and those tests fail as soon as you need to change the code. Instead, I test the expected behaviour via the public functions, breaking them in small, consistent chunks.
See Inspect.Opts for a description of the available options: :limit – limits the number of items that are printed for tuples, bitstrings, maps, lists and any other collection of items. It does not apply to strings nor charlists and defaults to 50. If you don’t want to limit the number of items to a particular …
Just follow the Elixir docs to add an element to a list ( and keep performance in mind =) ): iex> list = [1, 2, 3] iex> [0 | list] # fast [0, 1, 2, 3] iex> list ++ [4] # slow [1, 2, 3, 4] https://hexdocs.pm/elixir/List.html