From 4efb34bd728732101432843ed0bfbeb971272287 Mon Sep 17 00:00:00 2001
From: Louis Pilfold <louis@lpil.uk>
Date: Thu, 21 Dec 2023 14:03:41 +0000
Subject: Add chapters

---
 .../lesson03_function_captures/code.gleam                  | 14 ++++++++++++++
 .../lesson03_function_captures/text.html                   | 11 +++++++++++
 2 files changed, 25 insertions(+)
 create mode 100644 src/content/chapter1_functions/lesson03_function_captures/code.gleam
 create mode 100644 src/content/chapter1_functions/lesson03_function_captures/text.html

(limited to 'src/content/chapter1_functions/lesson03_function_captures')

diff --git a/src/content/chapter1_functions/lesson03_function_captures/code.gleam b/src/content/chapter1_functions/lesson03_function_captures/code.gleam
new file mode 100644
index 0000000..35f3412
--- /dev/null
+++ b/src/content/chapter1_functions/lesson03_function_captures/code.gleam
@@ -0,0 +1,14 @@
+import gleam/io
+
+pub fn main() {
+  // These two statements are equivalent
+  let add_one_v1 = fn(x) { add(1, x) }
+  let add_one_v2 = add(1, _)
+
+  io.debug(add_one_v1(10))
+  io.debug(add_one_v2(10))
+}
+
+fn add(a: Int, b: Int) -> Int {
+  a + b
+}
diff --git a/src/content/chapter1_functions/lesson03_function_captures/text.html b/src/content/chapter1_functions/lesson03_function_captures/text.html
new file mode 100644
index 0000000..afa87a3
--- /dev/null
+++ b/src/content/chapter1_functions/lesson03_function_captures/text.html
@@ -0,0 +1,11 @@
+<p>
+  Gleam has a shorthand syntax for creating anonymous functions that take one
+  argument and immediately call another function with that argument: the
+  function capture syntax.
+</p>
+<p>
+  The anonymous function <code>fn(a) { some_function(..., a, ...) }</code> can
+  be written as <code>some_function(..., _, ...)</code>, with any number of
+  other arguments passed to the inner function. The underscore <code>_</code> is
+  a placeholder for the final argument.
+</p>
-- 
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