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How to resume Fragment from BackStack if exists
...a Fragment, use the popBackStackImmediate() method. If it returns true, it means there is an instance of the Fragment in the back stack. If not, actually execute the Fragment replacement logic.
private void replaceFragment (Fragment fragment){
String backStateName = fragment.getClass().getName();...
What do the plus and minus signs mean in Objective-C next to a method?
... would like to know what the + and - signs next to a method definition mean.
4 Answers
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What does “for” attribute do in HTML tag?
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This is especially useful for use with checkboxes and buttons, since it means you can check the box by clicking on the associated text instead of having to hit the box itself.
Read more about this element in MDN.
share
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Ways to save Backbone.js model data?
...requests. GET and POST. In a RESTful environment, these verbs have special meaning for specific uses that Backbone assumes. When you want to get a certain resource from the server, (e.g. donut model I saved last time, a blog entry, an computer specification) and that resource exists, you do a GET re...
Difference between const & const volatile
... through that particular name/pointer.
The volatile part of the qualifier means that the compiler cannot optimize or reorder access to the object.
In an embedded system, this is typically used to access hardware registers that can be read and are updated by the hardware, but make no sense to write...
How do you remove a specific revision in the git history?
... Worked for me too. Btw, what does the ^ operator do? Does it mean the next commit after the specified one?
– hopia
Nov 11 '12 at 20:38
3
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Django optional url parameters
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Even simpler is to use:
(?P<project_id>\w+|)
The "(a|b)" means a or b, so in your case it would be one or more word characters (\w+) or nothing.
So it would look like:
url(
r'^project_config/(?P<product>\w+)/(?P<project_id>\w+|)/$',
'tool.views.ProjectConfig',...
What is the difference between Left, Right, Outer and Inner Joins?
...You can get a lot of results from this kind of join that might not even be meaningful, so use with caution.
OUTER join compares two tables and returns data when a match is available or NULL values otherwise. Like with INNER join, this will duplicate rows in the one table when it matches multiple re...
What is the meaning of “$” sign in JavaScript
...n the following JavaScript code there is a dollar ( $ ) sign. What does it mean?
7 Answers
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What is the “owning side” in an ORM mapping?
What exactly does the owning side mean? What is an explanation with some mapping examples ( one to many, one to one, many to one )?
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