Create 290-word-pattern.js

Author: everthis

290-word-pattern.js

@@ -0,0 +1,25 @@
+/**
+ * @param {string} pattern
+ * @param {string} str
+ * @return {boolean}
+ */
+const wordPattern = function(pattern, str) {
+  const pm = {}
+  const sm = {}
+  const sa = str.trim().split(' ')
+  if(pattern.length !== sa.length) return false
+  for(let i = 0; i< pattern.length; i++) {
+    if(!pm.hasOwnProperty(pattern[i])) {
+       pm[pattern[i]] = sa[i]
+    }
+    if(!sm.hasOwnProperty(sa[i])) {
+       sm[sa[i]] = pattern[i]
+    }
+
+    if( !(pm[pattern[i]] === sa[i] && sm[sa[i]] === pattern[i] ) ) {
+      return false   
+    }
+    
+  }
+  return true
+};