Tutorials

CSS Lesson: Horizontally center a div in a div

Learn how to center a div within a div using flex, css2 and css3. We preset multiple solutions to solved this problem and with cross browser compatibility.

How to delete a Git branch and tags locally and remotely?

Learn how to use git to delete local and remote branchs. We also include how to delete tags.

jQuery: get a checkbox value using jQuery

We explain how to get the value of the checked property in an HTML checkbox and then trigger an action based on the value. We recommend to use $('#conditions').prop('checked') when using jQuery 1.6+. If you want to set the checkbox value use: $("#conditions").attr("checked",true);. For Using the jquery toggle to a checkbox use $("#conditions").toggle(this.checked);`

How to redirect to another page using jQuery

Learn how to redirect to another page using javascript the correct way. You don't need to use jQuery to do the redirect. Check here the proper way to do a jquery redirect using just the window.location.replace("http://tutorials.technology"), white will avoid the back button infinite redirect. Check this tutorial for more details.

How to directly initialize a HashMap (in a literal way)?

How to initialize a Java HashMap with curly brackets notation. Learn here some alternatives.

Oracle SQL: How to write a que for filterting Date columns

Oracle SQL date format can be tricky to understand and could make you loose time to figure out why a query is not working. We use TRUNCATE and TO_DATE function to create a query to filter by a date on a timestamp column.

LEDE Linux: How to Upgrade with opkg

How to convert virtual box disk to KVM qcow

With a few linux commands convert any virtual box disk or virtual machine for use with KVM virtualization.