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Aug 1, 2018
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Show string-building anonymous function without parens #1151

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7 changes: 6 additions & 1 deletion getting-started/modules-and-functions.markdown
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Expand Up @@ -177,9 +177,14 @@ iex> fun = &(&1 + 1)
#Function<6.71889879/1 in :erl_eval.expr/5>
iex> fun.(1)
2

iex> fun2 = &"Good #{&1}"
#Function<6.127694169/1 in :erl_eval.expr/5>
iex)> fun2.("morning")
"Good morning"
```

The `&1` represents the first argument passed into the function. `&(&1+1)` above is exactly the same as `fn x -> x + 1 end`. The syntax above is useful for short function definitions.
The `&1` represents the first argument passed into the function. `&(&1 + 1)` above is exactly the same as `fn x -> x + 1 end`. The syntax above is useful for short function definitions.

If you want to capture a function from a module, you can do `&Module.function()`:

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