Create 2047-number-of-valid-words-in-a-sentence.js

Author: everthis

2047-number-of-valid-words-in-a-sentence.js

@@ -0,0 +1,42 @@
+/**
+ * @param {string} sentence
+ * @return {number}
+ */
+const countValidWords = function(s) {
+  const arr = s.split(' ')
+  let res = 0
+  for(const e of arr) {
+    if(e.trim() && valid(e.trim())) res ++
+  }
+  return res
+};
+ 
+function valid(e) {
+  const zi = '0'.charCodeAt(0), ni = '9'.charCodeAt(0)
+  const len = e.length
+  for(const el of e) {
+    if(el.charCodeAt(0) >= zi && el.charCodeAt(0) <= ni) return false
+  }
+  const num = (p, n) => (p >= 'a' && p <= 'z') && (n >= 'a' && n <= 'z')
+  const hi = e.indexOf('-')
+  if(hi !== -1) {
+    if(hi === 0 || hi === e.length - 1 || e.indexOf('-', hi + 1) !== -1 || !num(e[hi - 1], e[hi + 1])) return false
+  }
+  
+  const p1 = e.indexOf('!')
+  if(p1 !== -1) {
+    if((len > 1 && p1 !== e.length - 1) || e.indexOf('-', p1 + 1) !== -1) return false
+  }
+  
+  const p2 = e.indexOf('.')
+  if(p2 !== -1) {
+    if((len > 1 && p2 !== e.length - 1) || e.indexOf('-', p2 + 1) !== -1) return false
+  }
+  
+  const p3 = e.indexOf(',')
+  if(p3 !== -1) {
+    if((len > 1 && p3 !== e.length - 1) || e.indexOf('-', p3 + 1) !== -1) return false
+  }
+  
+  return true
+}