Added functions to js

banana.js

@@ -5,6 +5,13 @@ console.log(bananaencode(1000, 8));
 console.log(bananarandom());
 console.log(bananarandom(10));
 
+console.log(bananadecode("babaduga"));
+
+console.log(bananacheck("babaduga"));
+console.log(bananacheck("antani"));
+
+
+
 
 
 function bananaencode(num, minlength = 1) {
@@ -31,6 +38,58 @@ function bananaencode(num, minlength = 1) {
     return st;
 }
 
+
+
+
+function bananadecode(word) {
+    alphabets = Array("bcdfglmnprstvz".split(""), "aeiou".split(""));
+    shiftalpha = 0;
+    alphaend = 0;
+
+    numalpha = alphabets.length;
+
+    if ((word.length - alphaend) % numalpha != 0) { 
+        return "Invalid banana";
+    }
+    v = 0;
+
+    for (i = 0; i < word.length; i++) {
+        r = (numalpha + i + shiftalpha) % numalpha;
+        if (alphabets[r].indexOf(word[i]) != -1) {
+            v = v * alphabets[r].length + alphabets[r].indexOf(word[i]);
+        } else {
+            return("Invalid character in position " + (i + 1));
+        }
+    }
+
+    return v;
+}
+
+
+
+function bananacheck(word) {
+    alphabets = Array("bcdfglmnprstvz".split(""), "aeiou".split(""));
+    shiftalpha = 0;
+    alphaend = 0;
+
+    numalpha = alphabets.length;
+
+    if ((word.length - alphaend) % numalpha != 0) { 
+        return false;
+    }
+
+    for (i = 0; i < word.length; i++) {
+        r = (numalpha + i + shiftalpha) % numalpha;
+        if (alphabets[r].indexOf(word[i]) == -1) {
+            return false;
+        }
+    }
+
+    return true;
+}
+
+
+
 function bananarandom(minlength = 6) {
     alphabets = Array("bcdfglmnprstvz".split(""), "aeiou".split(""));
     shiftalpha = 0;