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Rank function in MySQL
...ows the variable initialization without requiring a separate SET command.
Test case:
CREATE TABLE person (id int, first_name varchar(20), age int, gender char(1));
INSERT INTO person VALUES (1, 'Bob', 25, 'M');
INSERT INTO person VALUES (2, 'Jane', 20, 'F');
INSERT INTO person VALUES (3, 'Jack', ...
What does the comma operator , do?
....len() > 5)
{
//do something
}
It will do the operation, then do a test based on a side-effect. The other way would be to do it like this:
string s;
read_string(s);
while(s.len() > 5)
{
//do something
read_string(s);
}
...
How to detect online/offline event cross-browser?
...
@chovy and how about now? I lately tested it in Firefox/Chrome and got the expected results, seeing that the flag is being set, when I turn off and on the internet connection..
– James Cazzetta
Nov 27 '15 at 12:45
...
What is a ViewModelLocator and what are its pros/cons compared to DataTemplates?
... how to resolve the types that we request from it. This allows for greater testability by instructing it to resolve the types (Views and ViewModels) we use when our application actually runs, but instructing it differently when running the unit tests for the application. In the latter case the appli...
How to concatenate strings of a string field in a PostgreSQL 'group by' query?
...parated_names FROM things;
--> ERROR: syntax error at or near "ORDER"
Tested on PostgreSQL 8.3.
CREATE FUNCTION string_agg_transfn(text, text, text)
RETURNS text AS
$$
BEGIN
IF $1 IS NULL THEN
RETURN $2;
ELSE
RETURN $1 ||...
Remove the string on the beginning of an URL
...u can do:
// this will replace the first occurrence of "www." and return "testwww.com"
"www.testwww.com".replace("www.", "");
// this will slice the first four characters and return "testwww.com"
"www.testwww.com".slice(4);
// this will replace the www. only if it is at the beginning
"www.testwww...
How to retrieve a file from a server via SFTP?
...worry about the ssh key checking.
import com.jcraft.jsch.*;
public class TestJSch {
public static void main(String args[]) {
JSch jsch = new JSch();
Session session = null;
try {
session = jsch.getSession("username", "127.0.0.1", 22);
session.set...
PostgreSQL Autoincrement
...t;=0)
);
ALTER SEQUENCE table1_seq OWNED BY table1.col_a;
If you wish to test how MySQL is different, run the following on a MySQL database:
CREATE TABLE table1 (
uid int unsigned NOT NULL AUTO_INCREMENT PRIMARY KEY,
col_b int unsigned NOT NULL
);
INSERT INTO table1 (col_b) VALUES(1);
INSERT...
What's the purpose of META-INF?
...nly directory where configuration files can be referenced both by the unit tests and the controllers. If another directory worked that would be great -- it doesn't (at least not straightforwardly). To me, building a Jar file just to test a war file is like building a car so you can walk to the kit...
How can I remove a style added with .css() function?
...accepted answer works but leaves an empty style attribute on the DOM in my tests. No big deal, but this removes it all:
removeAttr( 'style' );
This assumes you want to remove all dynamic styling and return back to the stylesheet styling.
...