This morning, there are some problems of our company email. I am a bit worrying about that. Our company website and email service are in the same web hosting company. Then I phoned to their support hotline. The problem is small, Our email has been just down about 10 minutes. I think no customers know about that. That is very important for phone support as a business. If I do some personal blogging, I can choose a budget web hosting which only provide support services via emails. Anything is not wrong, I just need to submit a ticket and wait. If I am running a business. I cannot afford much downtime. I need the things fixed as soon as possible. Thus, when I look at the webhost, support is my main factor to consider.
To check the object in the code above, that should check whether the object is nil.
Please note that, that is a pointer. If it has not initialized yet, it will be nil, not NSNull null.
null is a value for nothings, all pointer won't be null, unless you assign that is null object to there.
I found a good website for Bootstrap, BootstrapZero.. There are some starter kit to build a bootstrap website, such as a basic image slider website, admin console and silde bar website. Moreover, there are a number good free bootstap templates, such as a google plus like and facebook like templates. All of them are free of charge under a MIT License. I found there are enough resources to build a website. I do not need to buy other stuff online.
Stackpanel is a useful layout control in WPF. If you have a set of elements need to sit side by side each other, this is your best option. For example, in my advgen contact manager, in the right hand side, there is a set of buttons. Thus, I placed a stack panel. However, by the default, the controls inside the panel will flow in vertical direct, you need to set Orientation="Horizontal"
<StackPanel FlowDirection="LeftToRight" Orientation="Horizontal">
I have some styling in my WPF opensource project, AdvGen Contact Manager. That is similar with css, just state the class name like :