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What's the difference between using CGFloat and float?
...it will jump to the CGBase.h header where the typedef is defined. The same approach is used for NSInteger and NSUInteger as well.
These types were introduced to make it easier to write code that works on both 32-bit and 64-bit without modification. However, if all you need is float precision within...
How can I use different certificates on specific connections?
A module I'm adding to our large Java application has to converse with another company's SSL-secured website. The problem is that the site uses a self-signed certificate. I have a copy of the certificate to verify that I'm not encountering a man-in-the-middle attack, and I need to incorporate this...
What exactly does the post method do?
...use a new thread instead of UI thread (main thread)?
UI Thread :
When application is started, Ui Thread is created automatically
it is in charge of dispatching the events to the appropriate widgets
and this includes the drawing events.
It is also the thread you interact with Android widgets wit...
Difference between objectForKey and valueForKey?
...orKey can be intensely slow - it's currently a major bottleneck in my iPad app, so slow that replacing it with a "standard" dictionary made the app noticeably faster. Something very wrong with KVC on iOS, and I'll never use it again - not worth the drop in performance, and having to re-write it the ...
How to detect when cancel is clicked on file input?
...dden inputs (a definite perk if you're using a visual workaround for the crappy default input type='file'). After that, you just need to figure out if the input value changed.
An example:
var godzilla = document.getElementById('godzilla')
godzilla.onclick = charge
function charge()
{
documen...
Payment Processors - What do I need to know if I want to accept credit cards on my website? [closed]
..., no getting around this. There are other special cases also. This is an application process, be prepared.
Next you will want to purchase an SSL certificate that you can use for securing your communications for when the credit card info is transmitted over public networks. There are plenty of ve...
What's “requestCode” used for on PendingIntent?
... screen, I dont know whether is this the correct way and for me error was happening only when multiple FCMs were there in tray
– JSONParser
Dec 15 '18 at 9:06
...
To Workflow or Not to Workflow?
... you unproven, piece of technology. Do a small, non critical, piece of the application using WF4. That way if it works you can expand on it but if it fails you can rip it out and replace it with more traditional .NET code. That way you get real experience with WF4 instead of having to base a decisio...
How to get existing fragments when using FragmentPagerAdapter
...mentPagerAdapter and its source code. But the general solution should also apply to FragmentStatePagerAdapter.
If you're reading this you probably already know that FragmentPagerAdapter/FragmentStatePagerAdapter is meant to create Fragments for your ViewPager, but upon Activity recreation (whether ...
转型产品经理必看 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...走上了移动开发的道路，也就是在那时候，我开始做移动App项目，那时候，我把项目当做了产品。那时候对产品的理解是浅层的，跟多的是看得到的界面、用的到的功能，相信很多初入产品的同学都会有这个阶段，设计出漂亮的...