fernandocamargo · July 12, 2022 13:56 · Jul 12, 2022
diff --git a/README.md b/README.md
@@ -0,0 +1,5 @@
+Implement a compression algorithm that will count letters, e.g.
+coooooobalt => c6xobalt (or: 1xc6xo1xb1xa1xl1xt)
+stttartuuuup => s3xtart4xup (or: 1xs3xt1xa1xr1xt4xu1xp)
+
+Use the language/technology you feel strong in.
diff --git a/solution.js b/solution.js
@@ -0,0 +1,23 @@
+import initial from "lodash/initial";
+import last from "lodash/last";
+
+export const group = (stack, value) => {
+  const [letter, total] = last(stack) || [null, 0];
+  const chained = letter === value;
+  const next = [[value, chained ? total + 1 : 1]];
+
+  return chained ? initial(stack).concat(next) : stack.concat(next);
+};
+
+export const format = (stack, [letter, total]) =>
+  stack.concat(total > 1 ? `${total}x` : [], letter);
+
+export const compress = (object) => {
+  const collection = String(object).split("");
+  const groups = collection.reduce(group, []);
+
+  return groups.reduce(format, "");
+};
+
+console.log(compress("coooooobalt"))
+console.log(compress("stttartuuuup"))