add random_char helper

ryanatkn · Nov 16, 2023 · 8353169 · 8353169
1 parent ee2a4e3
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diff --git a/.changeset/eight-bottles-dress.md b/.changeset/eight-bottles-dress.md
@@ -0,0 +1,5 @@
+---
+'@grogarden/util': patch
+---
+
+add `random_char` helper
diff --git a/src/lib/package.ts b/src/lib/package.ts
@@ -286,6 +286,7 @@ export const src_json = {
 				{name: 'random_int', kind: 'function'},
 				{name: 'random_boolean', kind: 'function'},
 				{name: 'random_item', kind: 'function'},
+				{name: 'random_char', kind: 'function'},
 				{name: 'shuffle', kind: 'function'},
 			],
 		},

diff --git a/src/lib/random.ts b/src/lib/random.ts
@@ -9,6 +9,11 @@ export const random_boolean = (random = Math.random): boolean => random() > 0.5;
 export const random_item = <T>(arr: T[], random = Math.random): T =>
 	arr[random_int(0, arr.length - 1, random)];
 
+export const random_char = (chars = alphanumerics, random = Math.random): string =>
+	random_item(chars, random);
+
+const alphanumerics = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'.split('');
+
 /**
  * Mutates `array` with random ordering.
  */