Finished core and extensions

src/scrabble.js

@@ -1,5 +1,51 @@
-function scrabble() {
+function scrabble(word) {
+  if (typeof word !== 'string') return 0
+  let multiplier = 1
+  const array = word.toLowerCase().split('')
+  let result = 0
+  for (let i = 0; i < array.length; i++) {
+    if (array[i] in value) {
+      result += value[array[i]] * multiplier
+      continue
+    }
+    if (array[i] === '{') multiplier *= 2
+    else if (array[i] === '}') multiplier /= 2
+    else if (array[i] === '[') multiplier *= 3
+    else if (array[i] === ']') multiplier /= 3
+    else return 0
+  }
+  if (multiplier !== 1) return 0
+  return result
   // write code here
 }
 
+const value = {
+  a: 1,
+  b: 3,
+  c: 3,
+  d: 2,
+  e: 1,
+  f: 4,
+  g: 2,
+  h: 4,
+  i: 1,
+  j: 8,
+  k: 5,
+  l: 1,
+  m: 3,
+  n: 1,
+  o: 1,
+  p: 3,
+  q: 10,
+  r: 1,
+  s: 1,
+  t: 1,
+  u: 1,
+  v: 4,
+  w: 4,
+  x: 8,
+  y: 4,
+  z: 10
+}
+
 module.exports = scrabble