keyboard, fix clue bugs, length slider

src/clue.ts

@@ -0,0 +1,49 @@
+export enum Clue {
+  Absent,
+  Elsewhere,
+  Correct,
+}
+
+export interface CluedLetter {
+  clue?: Clue;
+  letter: string;
+}
+
+// clue("perks", "rebus")
+// [
+//   { letter: "p", clue: Absent },
+//   { letter: "e", clue: Correct },
+//   { letter: "r", clue: Elsewhere },
+//   { letter: "k", clue: Absent },
+//   { letter: "s", clue: Correct },
+// ]
+
+export function clue(word: string, target: string): CluedLetter[] {
+  let notFound: string[] = [];
+  target.split("").map((letter, i) => {
+    if (word[i] !== letter) {
+      notFound.push(letter);
+    }
+  });
+  return word.split("").map((letter, i) => {
+    let j: number;
+    if (target[i] === letter) {
+      return { clue: Clue.Correct, letter };
+    } else if ((j = notFound.indexOf(letter)) > -1) {
+      notFound[j] = "";
+      return { clue: Clue.Elsewhere, letter };
+    } else {
+      return { clue: Clue.Absent, letter };
+    }
+  });
+}
+
+export function clueClass(clue: Clue): string {
+  if (clue === Clue.Absent) {
+    return "letter-absent";
+  } else if (clue === Clue.Elsewhere) {
+    return "letter-elsewhere";
+  } else {
+    return "letter-correct";
+  }
+}