More info is available at the IEx documentation. ** (TokenMissingError) iex:2: incomplete expression This will cause IEx to throw a TokenMissingError and cancel waiting for any more input, returning you to a standard 'top-level' console input. If you find that IEx is waiting for you to finish an expression but you aren't sure what it needs to terminate the expression, or you simply want to abort this line of input, enter #iex:break as the console input. When you have entered something into IEx which expects a completion, such as a multiline string, IEx will change the prompt to indicate that it is waiting for you finish by changing the prompt to have an ellipsis (. The above is specifically useful when copy-pasting a relatively huge snippet turns the console to “awaiting-for-more-input” mode. ** (TokenMissingError) iex:1: incomplete expression To escape from “awaiting-for-more-input” mode (due to unclosed quotation mark, bracket etc,) type #iex:break, followed by carriage return ( ⏎): iex(1)> 'Hello, 'world' Then you'll see a new Elixir shell process coming up: Interactive Elixir (1.3.2) - press Ctrl+C to exit (type h() ENTER for help) To start an Elixir shell, type: '':local_start(). You'll end up in a new Erlang shell: Eshell V8.0.2 (abort with ^G) c (to connect to the new shell process).Sometimes you might accidentally run something in the shell that ends up waiting forever, and thus blocking the shell: iex(2)> receive do _ -> :stuck end You can now access your previous inputs using the up and down arrow keys, even across different IEx sessions. alias App.īy default, user input history in IEx do not persist across different sessions.Įrlang-history adds history support to both the Erlang shell and IEx: git clone :ferd/erlang-history.git iex.exs file at the root of your app, IEx will load them for you on startup. If you put your commonly used aliases into an. Have your aliases ready when you start IEx This is useful when you didn't store the PID from a previous command iex(1)> self() 'double quotes' because all UTF-8 encoded codepoints in it are printable. This is a string: a UTF-8 encoded binary. (v)ersion (k)ill (D)b-tables (d)istribution (iex) lib/iex/helpers.ex:357: /1īREAK: (a)bort (c)ontinue (p)roc info (i)nfo (l)oaded ** (RuntimeError) v(100) is out of bounds If you specify a non-existing row, IEx will raise an error: iex(7)> v(100) The value can be reused in other calculations: iex(7)> v(2) * 4 You can also specify an index relative to the current row: iex(5)> v(-1) # Retrieves value of row (5-1) -> 4 You can get a specific row passing the index of the row: iex(4)> v(3) See also: Get the value of a row with `v` Get the value of a previous command with `v` iex(1)> a = 10 Get value from last command with `v` iex(1)> 1 + 1 Returns the last element in list or nil if list is empty.

See documentation with `h` iex(1)> h List.last Recompile project with `recompile` iex(1)> recompile

Iex recompile