Add elixir encoding TIL

README.md

@@ -10,7 +10,7 @@ others" and "this is something really annoying that took forever to find out and
 I know I'll come across it again at some point so I want it committed for
 posterity".
 
-32 TILs and growing!
+33 TILs and growing!
 
 ---
 
@@ -38,6 +38,7 @@ posterity".
 
 ### Elixir
 
+- [Base encoding methods](elixir/base-encoding-methods.md)
 - [Get last value in IEx](elixir/get-last-value-in-iex.md)
 - [Test coverage](elixir/test-coverage.md)
 - [Test setup](elixir/test-setup.md)

elixir/base-encoding-methods.md

@@ -0,0 +1,19 @@
+# Base encoding methods
+
+With the methods of the `Base` module, you can pass which case you want the
+output string to be encoded in. Default is upper, but lower can be achieved
+without `String.downcase/1`:
+
+```elixir
+iex(1)> bytes = :crypto.strong_rand_bytes(32)
+<<10, 172, 2, 91, 154, 240, 89, 162, 143, 96, 28, 69, 174,
+  179, 223, 221, 232, 248, 28, 193, 159, 57, 142, 148, 188,
+  215, 14, 42, 69, 35, 225, 48>>
+iex(2)> bytes |> Base.encode16()
+"0AAC025B9AF059A28F601C45AEB3DFDDE8F81CC19F398E94BCD70E2A4523E130"
+iex(3)> bytes |> Base.encode16(case: :lower)
+"0aac025b9af059a28f601c45aeb3dfdde8f81cc19f398e94bcd70e2a4523e130"
+
+```
+
+[source](https://hexdocs.pm/elixir/Base.html)

structure.json

@@ -1 +1,61 @@
-{"C++":["Scoped enums"],"JavaScript":["File system flags in Node","Readline interface","Readline interface 2","Regular expression flags"],"shell":["List directories only","`mv` Tips and Tricks","Oh My Zsh Aliases","String manipulation","`which`"],"vim":["Ruler"],"WebAssembly":["Break statements","Global variables","Memory management","Tables"],"Rails":["Active record attributes","`select` vs `pluck`"],"PostgreSQL":["Filter clause"],"VS Code":["External terminal"],"Ruby":["`squeeze`"],"Linux":["Force quit hung ssh","Killing other ssh connections","U2F","Yubico Authenticator on Fedora"],"git":["Find file creation date","Push commit with tags","Set commit message editor"],"nginx":["Redirect requests to new domain"],"Elixir":["Get last value in IEx","Test coverage","Test setup","Turn on history in IEx"]}
+{
+  "C++": [
+    "Scoped enums"
+  ],
+  "JavaScript": [
+    "File system flags in Node",
+    "Readline interface",
+    "Readline interface 2",
+    "Regular expression flags"
+  ],
+  "shell": [
+    "List directories only",
+    "`mv` Tips and Tricks",
+    "Oh My Zsh Aliases",
+    "String manipulation",
+    "`which`"
+  ],
+  "vim": [
+    "Ruler"
+  ],
+  "WebAssembly": [
+    "Break statements",
+    "Global variables",
+    "Memory management",
+    "Tables"
+  ],
+  "Rails": [
+    "Active record attributes",
+    "`select` vs `pluck`"
+  ],
+  "PostgreSQL": [
+    "Filter clause"
+  ],
+  "VS Code": [
+    "External terminal"
+  ],
+  "Ruby": [
+    "`squeeze`"
+  ],
+  "Linux": [
+    "Force quit hung ssh",
+    "Killing other ssh connections",
+    "U2F",
+    "Yubico Authenticator on Fedora"
+  ],
+  "git": [
+    "Find file creation date",
+    "Push commit with tags",
+    "Set commit message editor"
+  ],
+  "nginx": [
+    "Redirect requests to new domain"
+  ],
+  "Elixir": [
+    "Base encoding methods",
+    "Get last value in IEx",
+    "Test coverage",
+    "Test setup",
+    "Turn on history in IEx"
+  ]
+}