fix docs

Author: zihejia

MixpanelDemo/screens/ProfileScreen.js

@@ -37,10 +37,6 @@ export default class ProfileScreen extends React.Component {
         this.mixpanel.getPeople().unset("a");
     }
 
-    incrementProperties = () => {
-        this.mixpanel.getPeople().increment({"a": 1.2, "b": 3});
-    }
-
     incrementProperty = () => {
         this.mixpanel.getPeople().increment("a", 1.2);
     }
@@ -54,7 +50,7 @@ export default class ProfileScreen extends React.Component {
     }
 
     unionProperties = () => {
-        this.mixpanel.getPeople().union({"a": ["goodbye", "hi"], "c": ["hello"]});
+        this.mixpanel.getPeople().union("a", ["goodbye", "hi"]);
     }
 
     trackChargeWithoutProperties = () => {
@@ -113,11 +109,6 @@ export default class ProfileScreen extends React.Component {
                         <Text style={styles.buttonText}>Unset Properties</Text>
                     </TouchableOpacity>
                 </View>
-                <View style={{ flexDirection: 'row', justifyContent: 'space-between' }}>
-                    <TouchableOpacity style={styles.button} onPress={this.incrementProperties}>
-                        <Text style={styles.buttonText}>Increment Properties</Text>
-                    </TouchableOpacity>
-                </View>
                 <View style={{ flexDirection: 'row', justifyContent: 'space-between' }}>
                     <TouchableOpacity style={styles.button} onPress={this.incrementProperty}>
                         <Text style={styles.buttonText}>Increment Property</Text>
@@ -134,7 +125,7 @@ export default class ProfileScreen extends React.Component {
                     </TouchableOpacity>
                 </View>
                 <View style={{ flexDirection: 'row', justifyContent: 'space-between' }}>
-                    <TouchableOpacity style={styles.button} onPress={this.identify}>
+                    <TouchableOpacity style={styles.button} onPress={this.unionProperties}>
                         <Text style={styles.buttonText}>Union Properties</Text>
                     </TouchableOpacity>
                 </View>

index.js

@@ -519,7 +519,7 @@ export class People {
      * provide a negative number for the value.
      *
      * @param {string} prop the People Analytics property that should have its value changed
-     * @param {string} by the amount to be added to the current value of the named property
+     * @param {number} by the amount to be added to the current value of the named property
      *
      */
     increment(prop, by) {
@@ -575,7 +575,7 @@ export class People {
      * If the property exists and is not list-valued, the union will be ignored.
      *
      * @param {string} name name of the list-valued property to set or modify
-     * @param {string} value an array of values to add to the property value if not already present
+     * @param {array} value an array of values to add to the property value if not already present
      */
     union(name, value) {
         if (!StringHelper.isValid(name)) {