Some days ago I switched my php application to another hosting.
MySql, as many other RDBMS’s, provides a lot of interesting functionalities.
The following example will show to you how to create a unique index from two columns in a table. This way, when you’ll insert new records into the table MySql will check for you if the record inserted is already into the table, and in this case MySql will not insert the record.
While I’m developing a new website in php I put all the source code into a directory and then to deploy the site I move the source code into the webhosting .
This way I can host different releases of the same site at the same time.
What is emqttd?
emqttd is a massively scalable and clusterable MQTT V3.1/V3.1.1 broker written in Erlang/OTP.
emqttd supports both MQTT V3.1/V3.1.1 protocol specification with extended features.
emqttd is aimed to provide a solid, enterprise grade, extensible open-source MQTT broker for IoT(M2M) applications that need to support ten millions of concurrent MQTT clients.
If you haven’t a GUI to run your preferred email client or a browser, and you need to check if you have received new mails in your gmail account, you can use your favourite shell in conjuction with the CURL application.
CURL is a swiss knife for the internet protocols.
In another post, I explained how to use the FOR command to loop through a range of numbers. This time I want to show some other interesting functionalities of the FOR command:
If you have to repeat the same piece of code inside a windows batch file you have several options to work on.
First you can think to repeat the code for each time you have to call it!!!!
Then you can think of using flow control…