Mar 30, 2017

Seamonkey: Enabling full-screen for Youtube video

Seamonkey default settings

For some reasons the internet browser Seamonkey decided to prevent people to open full screen YouTube video - maybe they were tired of complaints of user who couldn't not exit the video (by simply pressing Escape?!)

Anyway now by default the full-screen button on the lower-right is disabled.

Overriding the setting

in the url path type: about:config then confirm that you know what you are doing
then look for full-screen-api.enabled and set this to true

That is it

Mar 15, 2017

Sqlite: Using auto_increment and current date and time

The idea

As a good tip to get the most of the table entries - you want the user to focus on their important data - but you don't want to overwhelm them with extra typing that can be done automatically by database system.

Here is way to have an auto increment index and a default date and time of the entry done by the operator

Embedded during the table creation: 

sqlite> create table testauto (autoid integer primary key autoincrement, autodate default (datetime('now')), notes text ) ;

Operator just have to enter the notes column: 

sqlite> insert into testauto (notes) values ('this is a test of the auto increment and default date' ) ;
sqlite> insert into testauto (notes) values ('this is a second test of the auto increment and default date' ) ;
sqlite> insert into testauto (notes) values ('this is a third test of the auto increment and default date' ) ;

and as you see the index and the date are automatically filled

sqlite> select * from testauto ;
1|2017-03-15 15:34:05|this is a test of the auto increment and default date
2|2017-03-15 15:34:14|this is a second test of the auto increment and default date
3|2017-03-15 15:34:24|this is a third test of the auto increment and default date
sqlite>

Feb 10, 2017

Sqlite: how to generate a random number within range 0..99

Random()

The Sqlite random() function will returns a pseudo-random integer between -9223372036854775808 and +9223372036854775807.

abs() will returns the absolute value of the numeric argument

floor() or round() will return a floating-point value X rounded to Y digits to the right of the decimal point. If the Y argument is omitted, it is assumed to be 0.

NB:floor() will only work within SQLExplorer, Dbeaver, ...

Result

select floor(abs(random()/92233720368547758.07));
will generate within 0..99

and
select round(abs(random()/92233720368547758.07),0);
will generate within 1..100

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