var myJson = {
"element1": "hello",
"element2": 12,
"element3": true,
"element4": {
"subelement1": "one",
"sebelement2": 2
}};
for (var el in myJson) {
console.log("Element name: " + el + ", element value:" + myJson[el] + ", element type: " + typeof(myJson[el]));
}
| ThingWorx: Datetime format to be used in JavaScript with parseDate |
array.splice(index, howmany, item1, ....., itemX)
| Parameter | Description |
|---|---|
| index | Required. An integer that specifies at what position to add/remove items, Use negative values to specify the position from the end of the array |
| howmany | Optional. The number of items to be removed. If set to 0, no items will be removed |
| item1, ..., itemX | Optional. The new item(s) to be added to the array |
| Return Value: | A new Array, containing the removed items (if any) |
|---|
var fruits = ["Banana", "Orange", "Apple", "Mango"];
fruits.splice(2, 1, "Lemon", "Kiwi");
var fruits = ["Banana", "Orange", "Apple", "Mango", "Kiwi"];
fruits.splice(2, 2);
Set:
mySet[Symbol.iterator]Set iterator function, which is the values() function by default.reduce() method executes a reducer function (that you provide) on each element of the array, resulting in a single output value.map() method creates a new array populated with the results of calling a provided function on every element in the calling array.
| function showName (firstName, lastName) { | |
| var nameIntro = "Your name is "; | |
| // this inner function has access to the outer function's variables, including the parameter | |
| function makeFullName () { | |
| return nameIntro + firstName + " " + lastName; | |
| } | |
| | |
| return makeFullName (); | |
| } | |
| | |
| showName ("Michael", "Jackson"); // Your name is Michael Jackson |
What does this mean: "undefined object property"?
Actually it can mean two quite different things! First, it can mean the property that has never been defined in the object and, second, it can mean the property that has an undefined value. Let's look at this code: o.a undefined? Yes! Its value is undefined. Is o.b undefined? Sure! There is no property 'b' at all! OK, see now how different approaches behave in both situations:typeof obj.prop == 'undefined' and obj.prop === undefined are equivalent, and they do not distinguish those different situations. And 'prop' in obj
can detect the situation when a property hasn't been defined at all and
doesn't pay attention to the property value which may be undefined. |
<project ...>
<repositories>
<repository>
<id>JBoss repository</id>
<url>http://repository.jboss.org/nexus/content/groups/public/</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>3.6.3.Final</version>
</dependency>
<!-- Hibernate c3p0 connection pool -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-c3p0</artifactId>
<version>3.6.3.Final</version>
</dependency>
</dependencies>
</project><?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="hibernate.connection.url">jdbc:oracle:thin:@localhost:1521:MKYONG</property>
<property name="hibernate.connection.username">mkyong</property>
<property name="hibernate.connection.password">password</property>
<property name="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</property>
<property name="hibernate.default_schema">MKYONG</property>
<property name="show_sql">true</property>
<property name="hibernate.c3p0.min_size">5</property>
<property name="hibernate.c3p0.max_size">20</property>
<property name="hibernate.c3p0.timeout">300</property>
<property name="hibernate.c3p0.max_statements">50</property>
<property name="hibernate.c3p0.idle_test_period">3000</property>
<mapping class="com.mkyong.user.DBUser"></mapping>
</session-factory>
</hibernate-configuration>| Property | Explanation |
|---|---|
| minpool | Minimum number of connections that should be held in the pool. |
| maxpool | Maximum number of connections that may be held in the pool. |
| maxsize | Maximum number of connections that can be created for use. |
| idleTimeout | The idle timeout for connections (seconds). |
| Property | Description |
|---|---|
| name | Name of the DataSource, which is also used to assign a ConnectionPool name. |
| description | Description for the DataSource. |
| driverClassName | Fully-qualified class name of JDBC Driver to use. |
| url | JDBC URL to connect to the database. |
| user | Username for database connections. |
| password | Password for database connections. |
| passwordDecoderClassName | Fully-qualified class name of snaq.db.PasswordDecoder implementation to use. (It must have a public no-argument constructor). |
| minPool | Minimum number of pooled connections to maintain. |
| maxPool | Maximum number of pooled connections to maintain. |
| maxSize | Maximum number of connection that can be created. |
| idleTimeout | Idle timeout of pooled connections (seconds). |
| loginTimeout | Timeout for database connection attempts (seconds). |
| validatorClassName | Fully-qualified class name of snaq.db.ConnectionValidator implementation to use. (It must have a public no-argument constructor). |
| validatorQuery* | Query string to use for validation, if validatorClassName not specified. This is passed to a snaq.db.SimpleQueryValidator instance. |
c3p0
|
Distributed with Hibernate
| |
Apache DBCP
|
Apache Pool
| |
Proxool
|
JDBC Pooling Wrapper
|
