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What is the difference between “Class.forName()” and “Class.forName().newInstance()”?
...;
}
But there were also buggy JDBC drivers, starting with the org.gjt.mm.mysql.Driver as well known example, which incorrectly registers itself inside the Constructor instead of a static block:
package com.dbvendor.jdbc;
import java.sql.Driver;
import java.sql.DriverManager;
public class BadDri...
Map enum in JPA with fixed values?
...nverter.
Create an enumerated class like so:
public enum NodeType {
ROOT("root-node"),
BRANCH("branch-node"),
LEAF("leaf-node");
private final String code;
private NodeType(String code) {
this.code = code;
}
public String getCode() {
return code;
...
What is the difference between SQL, PL-SQL and T-SQL?
... by almost all relational database management systems: SQL Server, Oracle, MySQL, PostgreSQL, DB2, Informix, etc.
PL/SQL is a proprietary procedural language used by Oracle
PL/pgSQL is a procedural language used by PostgreSQL
TSQL is a proprietary procedural language used by Microsoft in SQL Server....
Convert form data to JavaScript object with jQuery
...ou're trying to serialize Rails-like forms, you may want to remove element root from the generated keys. To achieve that, I've added a new param keyMap and the following line: key = if keyMap? then keyMap(@name) else @name. Now you can pass mapping function like (name) -> name.match(/\[([^\]]+)]/...
ruby system command check exit code
...capture it as part of your REPL command [10] pry(main)> system("touch /root/test 2> /dev/null") => false [11] pry(main)> $?.exitstatus => 0 [12] pry(main)> system("touch /root/test 2> /dev/null"); $?.exitstatus => 1
– lardcanoe
Mar 9 '1...
How can I get the external SD card path for Android 4.0+?
...nment.getExternalStorageDirectory();
//Retrieve the External Storages root directory:
final String externalStorageRootDir;
if ( (externalStorageRootDir = primaryExternalStorage.getParent()) == null ) { // no parent...
Log.d(TAG, "External Storage: " + primaryExternalStorage + "...
Permission denied on accessing host directory in Docker
...preferred solution is to start the container with an entrypoint running as root, fix the uid/gid of the user inside the container to match the host volume uid/gid, and then use gosu to drop from root to the container user to run the application inside the container. The important script for this is ...
How to make connection to Postgres via Node.js
... - I use Node-DBI to connect to PG, but also due to the ability to talk to MySQL and sqlite. Node-DBI also includes functionality to build a select statement, which is handy for doing dynamic stuff on the fly.
Quick sample (using config information stored in another file):
var DBWrapper = require...
Is it possible to declare a variable in Gradle usable in Java?
... %c - %m%n</pattern>
</layout>
</appender>
<root level="info">
<appender-ref ref="FILE"/>
</root>
</configuration>
Files:
build.gradle
src/main/java/example/HelloWorld.java
src/test/java/example/HelloWorldTest.java
src/test/resources/logb...
Render HTML to PDF in Django site
...rServerClient(models.Manager):
def __handle_exception(self, exception_root, exception_id, exec_info ):
type, value, traceback = exec_info
raise JasperServerClientError(exception_root, exception_id), None, traceback
# 01: REPORT-METADATA
# get resource description to ...