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How do I create an immutable Class?
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I think you're on the right track -
all information injected into the class should be supplied in the constructor
all properties should be getters only
if a collection (or Array) is passed into the constructor, it should be copied to keep the caller from modifying it later
if you're goin...
How to get image height and width using java?
Is there any other way besides using ImageIO.read to get image height and width?
13 Answers
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What's the difference between %s and %d in Python string formatting?
...number. Their associated values are passed in via a tuple using the % operator.
name = 'marcog'
number = 42
print '%s %d' % (name, number)
will print marcog 42. Note that name is a string (%s) and number is an integer (%d for decimal).
See https://docs.python.org/3/library/stdtypes.html#printf-...
NSUserDefaults not cleared after app uninstall on simulator
this may sound real NOOB! I want to check if it's the second time the user enters my application, so to keep the run count I'm using NSUserDefaults . I have implemented the following code in my rootViewController 's viewDidLoad method:
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MongoDB not equal to
I'm trying to display a query in MongoDB where a text field is not '' (blank)
6 Answers
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How to see if an object is an array without using reflection?
....isArray();
}
This works for both object and primitive type arrays.
For toString take a look at Arrays.toString. You'll have to check the array type and call the appropriate toString method.
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Reset the database (purge all), then seed a database
Is there a rake command to wipe out the data in the database tables?
6 Answers
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How do you version your database schema? [closed]
...you prepare your SQL deltas? do you manually save each schema-changing SQL to a delta folder, or do you have some kind of an automated diffing process?
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What is the Windows equivalent of the diff command?
I know that there is a post similar to this : here .
I tried using the comp command like it mentioned, but if I have two files, one with data like "abcd" and the other with data "abcde", it just says the files are of different sizes. I wanted to know where exactly they differ. In Unix, the simp...
python list by value not by reference [duplicate]
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Doesn't work for me. Any changes I make to b are also seen in a.
– Mannix
May 28 '17 at 19:50
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