Pangram

typescript/pangram/pangram.ts

@@ -0,0 +1,9 @@
+export const isPangram = (text: string): boolean =>
+  text
+    .toLowerCase()
+    .split("")
+    .sort()
+    .map((v) => v.charCodeAt(0))
+    .filter((v) => v >= 97 && v <= 97 + 25)
+    .reduce((r, v) => (r[r.length - 1] === v ? r : [...r, v]), [] as number[])
+    .length === 26;