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When should I use nil and NULL in Objective-C?
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You can use nil about anywhere you can use null. The main difference is that you can send messages to nil, so you can use it in some places where null cant work.
In general, just use nil.
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Undoing a 'git push'
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You need to make sure that no other users of this repository are fetching the incorrect changes or trying to build on top of the commits that you want removed because you are about to rewind history.
Then you need to 'force' push the old reference.
git push -f origin last_known_good_commit:br...
New line in text area
I tried both but new line is not reflecting while rendering the html file.
How can I do that?
12 Answers
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Replace input type=file by an image
Like a lot of people, I'd like to customize the ugly input type=file , and I know that it can't be done without some hacks and/or javascript . But, the thing is that in my case the upload file buttons are just for uploading images ( jpeg|jpg|png|gif ), so I was wondering if I could use a " clickab...
putting datepicker() on dynamically created elements - JQuery/JQueryUI
...nt each of them to be able to display a calendar on click. The code I am using is:
12 Answers
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PHP + MySQL transactions examples
...ly haven't found normal example of PHP file where MySQL transactions are being used. Can you show me simple example of that?
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jQuery get the location of an element relative to window
Given an HTML DOM ID, how to get an element's position relative to the window in JavaScript/JQuery? This is not the same as relative to the document nor offset parent since the element may be inside an iframe or some other elements. I need to get the screen location of the element's rectangle (as ...
Confused about __str__ on list in Python [duplicate]
Coming from a Java background, I understand that __str__ is something like a Python version of toString (while I do realize that Python is the older language).
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Get the current first responder without using a private API
...tion email today. It tells me that my app cannot be accepted because I'm using a non-public API; specifically, it says,
28 ...
How to crop circular area from bitmap in Android
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After long brainstorming I have found the solution
public Bitmap getCroppedBitmap(Bitmap bitmap) {
Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
bitmap.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canva...