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When to use os.name, sys.platform, or platform.system?
... checks for the system’s identity
Often the "best" future-proof way to test whether some functionality is available is just to try to use it and use a fallback if it fails.
what about the difference between sys.platform and platform.system()?
platform.system() returns a normalized value th...
NSUserDefaults not cleared after app uninstall on simulator
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Tested it on iOS 8 GM and the bug is still existent. Very annoying.
– Manfred Scheiner
Sep 10 '14 at 19:28
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Is there a limit to the length of HTML attributes?
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I've just written a test which puts a string of length 10 million into an attribute and then retrieves it again, and it works fine (Firefox 3.5.2 & Internet Explorer 7)
50 million makes the browser hang with the "This script is taking a lon...
How do you find out the type of an object (in Swift)?
...spection would be with the Mirror struct,
let stringObject:String = "testing"
let stringArrayObject:[String] = ["one", "two"]
let viewObject = UIView()
let anyObject:Any = "testing"
let stringMirror = Mirror(reflecting: stringObject)
let stringArrayMirror = Mirror(reflecti...
Getting the name of a variable as a string
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Somehow the function does not work in a loop: test = {} print(varname.nameof(test)) for i in [0]: print(varname.nameof(test)) The first print gives test, the print in the loop raises VarnameRetrievingError: Callee's node cannot be detected.
– Tillus...
The difference between sys.stdout.write and print?
...tdout = open('log.txt', 'w') # redirect all prints to this log file
print("testing123") # nothing appears at interactive prompt
print("another line") # again nothing appears. it's written to log file instead
sys.stdout.close() # ordinary file object
sys.stdou...
Java: Class.this
...difference when I code it as "LocalScreen.this" as compared to "this" ? I tested both and the compiler only accepted "LocalScreen.this". The first parameter of aFuncCall expect aParent class which is a parent class of "Somethig".
– Johnny Jazz
Apr 3 '11 at 14...
Why do we usually use || over |? What is the difference?
... thing you're getting from a function is actually an error code and you're testing for non-0-ness, this can matter quite a lot.
This isn't as much of an issue in Java where you have to explicitly typecast to boolean or compare with 0 or the like, but in other languages with similar syntax (C/C++ et...
What is the difference between NaN and None?
...nswer the second question:
You should be using pd.isnull and pd.notnull to test for missing data (NaN).
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How to generate a random string of a fixed length in Go?
...haracters only (uppercase or lowercase), no numbers, in Go. What is the fastest and simplest way to do this?
11 Answers
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