fix readme.md, example, null value to string. closes #20, closes #18. might close #19

Author: DvirDukhan

README.md

@@ -36,7 +36,7 @@ graph
 	return graph.query("CREATE (:person{name:'amit',age:30})");
 })
 .then( () => {
-	return graph.query("MATCH (a:person), (b:person) WHERE (a.name = 'roi' AND b.name='amit') CREATE (a)-[:knows]->(a)")
+	return graph.query("MATCH (a:person), (b:person) WHERE (a.name = 'roi' AND b.name='amit') CREATE (a)-[:knows]->(b)")
 })
 .then( () => {
 	return graph.query("MATCH (a:person)-[:knows]->(:person) RETURN a")

examples/redisGraphExample.js

@@ -3,25 +3,25 @@ const RedisGraph = require("redisgraph.js").RedisGraph;
 let graph = new RedisGraph("social");
 
 graph
-	.query("CREATE (:person{name:'roi',age:32})")
-	.then(() => {
-		return graph.query("CREATE (:person{name:'amit',age:30})");
-	})
-	.then(() => {
-		return graph.query(
-			"MATCH (a:person), (b:person) WHERE (a.name = 'roi' AND b.name='amit') CREATE (a)-[:knows]->(a)"
-		);
-	})
-	.then(() => {
-		return graph.query("MATCH (a:person)-[:knows]->(:person) RETURN a");
-	})
-	.then(res => {
-		while (res.hasNext()) {
-			let record = res.next();
-			console.log(record.getString("a.name"));
-		}
-		console.log(res.getStatistics().queryExecutionTime());
-	})
-	.catch(err => {
-		console.log(err);
-	});
+    .query("CREATE (:person{name:'roi',age:32})")
+    .then(() => {
+        return graph.query("CREATE (:person{name:'amit',age:30})");
+    })
+    .then(() => {
+        return graph.query(
+            "MATCH (a:person), (b:person) WHERE (a.name = 'roi' AND b.name='amit') CREATE (a)-[:knows]->(b)"
+        );
+    })
+    .then(() => {
+        return graph.query("MATCH (a:person)-[:knows]->(:person) RETURN a");
+    })
+    .then(res => {
+        while (res.hasNext()) {
+            let record = res.next();
+            console.log(record.getString("a.name"));
+        }
+        console.log(res.getStatistics().queryExecutionTime());
+    })
+    .catch(err => {
+        console.log(err);
+    });

src/record.js

@@ -2,42 +2,42 @@
  * Hold a query record
  */
 class Record {
-	constructor(header, values) {
-		this._header = header;
-		this._values = values;
-	}
+    constructor(header, values) {
+        this._header = header;
+        this._values = values;
+    }
 
-	get(key) {
-		let index = key;
-		if (typeof key === "string") {
-			index = this._header.indexOf(key);
-		}
-		return this._values[index];
-	}
-	
-	getString(key) {
-		let index = key;
-		if (typeof key === "string") {
-			index = this._header.indexOf(key);
-		}
-		return this._values[index].toString();
-	}
+    get(key) {
+        let index = key;
+        if (typeof key === "string") {
+            index = this._header.indexOf(key);
+        }
+        return this._values[index];
+    }
 
-	keys() {
-		return this._header;
-	}
+    getString(key) {
+        let index = key;
+        if (typeof key === "string") {
+            index = this._header.indexOf(key);
+        }
+        return this._values[index] ? this._values[index].toString() : null;
+    }
 
-	values() {
-		return this._values;
-	}
+    keys() {
+        return this._header;
+    }
 
-	containsKey(key) {
-		return this._header.includes(key);
-	}
+    values() {
+        return this._values;
+    }
 
-	size() {
-		return this._header.length;
-	}
+    containsKey(key) {
+        return this._header.includes(key);
+    }
+
+    size() {
+        return this._header.length;
+    }
 }
 
 module.exports = Record;