From f70130322cd306268c5da12c1517dc5725615ae8 Mon Sep 17 00:00:00 2001 From: Louis Pilfold Date: Thu, 15 Feb 2024 12:18:17 +0000 Subject: text -> en --- .../lesson04_externals/text.html | 25 ---------------------- 1 file changed, 25 deletions(-) delete mode 100644 src/content/chapter5_advanced_features/lesson04_externals/text.html (limited to 'src/content/chapter5_advanced_features/lesson04_externals/text.html') diff --git a/src/content/chapter5_advanced_features/lesson04_externals/text.html b/src/content/chapter5_advanced_features/lesson04_externals/text.html deleted file mode 100644 index 8815fa7..0000000 --- a/src/content/chapter5_advanced_features/lesson04_externals/text.html +++ /dev/null @@ -1,25 +0,0 @@ -

- Sometimes in our projects we want to use code written in other languages, most - commonly Erlang and JavaScript, depending on which runtime is being used. - Gleam's external functions and external types allow us to - import and use this non-Gleam code. -

-

- An external type is one that has no constructors. Gleam doesn't know what - shape it has or how to create one, it only knows that it exists. -

-

- An external function is one that has the @external attribute on - it, directing the compiler to use the specified module function as the - implementation, instead of Gleam code. -

-

- The compiler can't tell the types of functions written in other languages, so - when the external attribute is given type annotations must be provided. Gleam - trusts that the type given is correct so an inaccurate type annotation can - result in unexpected behaviour and crashes at runtime. Be careful! -

-

- External functions are useful but should be used sparingly. Prefer to write - Gleam code where possible. -

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