refactor and cleanup

Author: pasit.r

src/spelling/t9.js

@@ -1,6 +1,7 @@
 import * as io from '../utils/io.js'
 
 const map = {
+  ' ': '0',
   'a': '2',
   'b': '22',
   'c': '222',
@@ -26,11 +27,12 @@ const map = {
   'w': '9',
   'x': '99',
   'y': '999',
-  'z': '9999',
-  ' ': '0'
+  'z': '9999'
 }
+
 const charToDigit = char => map[char]
-const spacing = (prev, current) => {
+
+const joinWithSpace = (prev, current) => {
   const prevChar = prev[prev.length - 1]
   const nextChar = current[0]
   if (prevChar === nextChar) {
@@ -43,14 +45,10 @@ const notEmpty = (line) => line && line.length
 
 const formatLine = (line, index) => `Case #${index + 1}: ${line}`
 
-export const convertLine = (line) => Array.from(line).map(charToDigit).reduce(spacing, '')
+export const convertLine = (line) => Array.from(line).map(charToDigit).reduce(joinWithSpace, '')
 
 export const convertMulti = (input) => input.split('\n').slice(1).filter(notEmpty).map(convertLine)
 
 export const convert = (input) => convertMulti(input).map(formatLine).join('\n')
 
-export default(file) => io.readAsString(file).then(input => {
-  const output = convert(input)
-  console.log(output)
-  io.writeFile(output)
-})
+export default(file) => io.readAsString(file).then(convert).then(io.writeFile)