cblanc · May 18, 2020 14:58 · May 18, 2020 · May 18, 2020
diff --git a/top10.csv b/top10.csv
@@ -1,3 +1,4 @@
+Score, Postcode
 197,WV99 1ZZ
 196,WV99 1ZY
 196,WV99 1YZ

diff --git a/score_postcodes.ts b/score_postcodes.ts
@@ -0,0 +1,33 @@
+import * as fs from "fs";
+import * as path from "path";
+import * as csv from "fast-csv";
+
+interface NumberScore {
+  scores: number[];
+  remainingString: string;
+}
+
+const extractNumbers = (input: string): NumberScore => {
+  const results = input.match(/[0-9]+/g);
+  const remainingString = input.replace(/[0-9]+/g, "");
+  const scores = results.map((e) => parseInt(e, 10));
+  return { remainingString, scores };
+};
+
+const letterScore = (l: string): number => l.toUpperCase().charCodeAt(0) - 64;
+const add = (prev: number, curr: number) => prev + curr;
+const computeScore = (input: string): number => {
+  const { scores, remainingString } = extractNumbers(input);
+
+  const letterScores = remainingString
+    .split("")
+    .filter((e) => e.match(/\w/gi))
+    .map((e) => letterScore(e));
+  return [...scores, ...letterScores].reduce(add);
+};
+
+fs.createReadStream(path.resolve(__dirname, "output.csv"))
+  .pipe(csv.parse({ headers: false }))
+  .on("error", (error) => console.error(error))
+  .on("data", (row) => console.log(`${computeScore(row[0])},${row[0]}`))
+  .on("end", (rowCount: number) => console.log(`Parsed ${rowCount} rows`));
diff --git a/top10.csv b/top10.csv
@@ -0,0 +1,10 @@
+197,WV99 1ZZ
+196,WV99 1ZY
+196,WV99 1YZ
+196,WV98 1ZZ
+196,SS99 9YY
+195,WV99 1ZX
+195,WV99 1YY
+195,WV99 1XZ
+195,WV98 1ZY
+195,WV98 1YZ