Ontraport test solution

ontraport_coding.js

@@ -0,0 +1,172 @@
+//Question 1 Answer
+/**
+ * Convert Array to String
+ * @param JSON Array
+ * @returns Array as string
+ */
+function stringifyArray(jsonArr) {
+    const solArr = [];
+    for (let i = 0; i < jsonArr.length; i++) {
+        let res = i.toString() + "/";
+        if (typeof jsonArr[i] === "object") {
+            solArr.push(res += stringifyObject(jsonArr[i]));
+        } else if (Array.isArray(jsonArr[i])) {
+            const s = stringifyArray(jsonArr[i]);
+            for (const k in s) {
+                solArr.push(res + k);
+            }
+        } else {
+            solArr.push(i.toString() + ":" + jsonArr[i].toString());
+        }
+    }
+    return solArr;
+}
+
+/**
+ * Convert JSON Object to String
+ * @param JSON Object
+ * @returns Json Object as String
+ */
+function stringifyObject(jsonObj) {
+    let res;
+    const solArr = [];
+    for (const key in jsonObj) {
+        if (jsonObj.hasOwnProperty(key)) {
+            if (typeof jsonObj[key] === "object") {
+                res = stringifyObject(jsonObj[key]);
+                for (const resKey in res) {
+                    solArr.push(key.toString() + "/" + res[resKey]);
+                }
+            } else if (Array.isArray(jsonObj[key])) {
+                res = stringifyArray(jsonObj[key]);
+                for (const resKey in res) {
+                    solArr.push(key.toString() + "/" + res[resKey]);
+                }
+            } else {
+                solArr.push(key.toString() + ":" + jsonObj[key]);
+            }
+        }
+    }
+    return solArr;
+}
+
+/**
+ *https://stackoverflow.com/questions/175739/built-in-way-in-javascript-to-check-if-a-string-is-a-valid-number
+ * Check if string is a valid number
+ * @param str string to check
+ * @returns true if string is number, false otherwise
+ */
+function isNumeric(str) {
+    if (typeof str != "string") return false // we only process strings!
+    return !isNaN(str) && // use type coercion to parse the _entirety_ of the string (`parseFloat` alone does not do this)...
+        !isNaN(parseFloat(str)) // ...and ensure strings of whitespace fail
+}
+
+/**
+ * Convert String array to Object
+ * @param i index in string
+ * @param text the string broken up in array
+ * @param object the object to parse to
+ * @returns the object parsed from string
+ */
+function toObject(i, text, object) {
+    if (text[i].includes(":")) {
+        const arr = text[i].split(":");
+        text.splice(i, 1);
+        text.push(...arr);
+        if (isNumeric(text[i])) {
+            /*
+                        if (object.hasOwnProperty(text[i - 1])) {
+                            object[text[i - 1]].push(text[i + 1]);
+                            return object;
+                        } else {
+                            object[text[i - 1]] = [text[i + 1]];
+                            return object;
+                        }
+            */
+            return [parseInt(text[i + 1])];
+        } else {
+            object[text[i]] = parseInt(text[i + 1]);
+            return object;
+        }
+    } else {
+        if (isNumeric(text[i])) {
+            const o = toObject(i + 1, text, {});
+            /*
+                        if (object.hasOwnProperty(text[i - 1])) {
+                            object[text[i - 1]].push(o);
+                            return object;
+                        } else {
+                            object[text[i - 1]] = o;
+                            return object;
+                        }
+            */
+            return [o];
+        } else {
+            var rec = toObject(i + 1, text, {});
+            if (Array.isArray(rec)) {
+                if (object.hasOwnProperty(text[i])) {
+                    object[text[i]].push(rec[0]);
+                } else {
+                    object[text[i]] = rec;
+                }
+            } else {
+                object[text[i]] = rec
+            }
+            return object;
+        }
+    }
+}
+
+/**
+ * Put the object in parent object recursively
+ * @param o the parent object
+ * @param s the object to insert
+ */
+function putter(o, s) {
+    let k = Object.keys(s)[0]
+    if (o.hasOwnProperty(k)) {
+        if (Array.isArray(s[k])) {
+            o[k].push(s[k][0]);
+        } else
+            putter(o[k], s[k]);
+    } else {
+        o[k] = s[k];
+    }
+}
+
+const testCase = {
+    'one':
+        {
+            'two': 3,
+            'four': [5, 6, 7]
+        },
+    'eight':
+        {
+            'nine':
+                {
+                    'ten': 11
+                }
+        }
+};
+
+const stringifiedTestCase = stringifyObject(testCase);
+console.log("Object to string:");
+console.log(stringifiedTestCase);
+
+var o = {};
+for (const rKey in stringifiedTestCase) {
+    const text = stringifiedTestCase[rKey].split("/");
+    const s = toObject(0, text, {});
+    if (Array.isArray(s)) {
+        if (o.hasOwnProperty(text[0])) {
+            o[text[0]].push(s[0]);
+        } else {
+            o[text[0]] = s;
+        }
+    } else {
+        putter(o, s);
+    }
+}
+console.log("Back to original object:");
+console.log(o);