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Objective-C Static Class Level variables

I have a class Film, each of which stores a unique ID. In C#, Java etc I can define a static int currentID and each time i set the ID i can increase the currentID and the change occurs at the class level not object level. Can this be done in Objective-C? I've found it very hard to find an answer for...
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How do you make a deep copy of an object?

It's a bit difficult to implement a deep object copy function. What steps you take to ensure the original object and the cloned one share no reference? ...
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Purpose of Activator.CreateInstance with example?

Can someone explain Activator.CreateInstance() purpose in detail? 9 Answers 9 ...
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How to delete and replace last line in the terminal using bash?

I want to implement a progress bar showing elapsed seconds in bash. For this, I need to erase the last line shown on the screen (command "clear" erases all the screen, but I need to erase only the line of the progress bar and replace it with the new information). ...
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Check if a temporary table exists and delete if it exists before creating a temporary table

I am using the following code to check if the temporary table exists and drop the table if it exists before creating again. It works fine as long as I don't change the columns. If I add a column later, it will give an error saying "invalid column". Please let me know what I am doing wrong. ...
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Using 'starts with' selector on individual class names

If I have the following: 7 Answers 7 ...
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How to check if a string is a valid date

I have a string: "31-02-2010" and want to check whether or not it is a valid date. What is the best way to do it? 14 Answ...
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Count the number of commits on a Git branch

I found this answer already: Number of commits on branch in git but that assumes that the branch was created from master. ...
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Can iterators be reset in Python?

Can I reset an iterator / generator in Python? I am using DictReader and would like to reset it to the beginning of the file. ...
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How can we run a test method with multiple parameters in MSTest?

NUnit has a feature called Values, like below: 9 Answers 9 ...