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Ways to save enums in database
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164
We never store enumerations as numerical ordinal values anymore; it makes debugging and support ...
Pythonic way to combine FOR loop and IF statement
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340
You can use generator expressions like this:
gen = (x for x in xyz if x not in a)
for x in ge...
How to check if a specified key exists in a given S3 bucket using Java
...he details of the object (not the contents) of the object. It will throw a 404 if the object is missing. So you can catch that exception and deal with it in your app.
But in order for this to work, you will need to have ListBucket access for the user on that bucket. Just GetObject access will not ...
Why use a prime number in hashCode?
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104
Because you want the number you are multiplying by and the number of buckets you are inserting i...
Can I start the iPhone simulator without “Build and Run”?
...ons/Xcode.app/Contents/Developer/Applications/iOS Simulator.app.
Xcode 4.x, 5.x
In Xcode 4.x (through 4.5 on Mountain Lion) and Xcode 5.0.x on Mavericks, it lives here: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Applications/
In my version of Xcode...
What is the use of the ArraySegment class?
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ArraySegment<T> has become a lot more useful in .NET 4.5+ and .NET Core as it now implements:
IList<T>
ICollection<T>
IEnumerable<T>
IEnumerable
IReadOnlyList<T>
IReadOnlyCollection<T>
as opposed to the .NET 4 version which implemented no inter...
Is there a performance difference between a for loop and a for-each loop?
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From Item 46 in Effective Java by Joshua Bloch :
The for-each loop, introduced in
release 1.5, gets rid of the clutter
and the opportunity for error by
hiding the iterator or index variable
completely. The resulting idiom
...
How does java do modulus calculations with negative numbers?
Am I doing modulus wrong? Because in Java -13 % 64 is supposed to evaluate to -13 but I get 51 .
14 Answers
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Cordova 3.5.0 Install Error- Please Install Android Target 19
...I level for android Kitkat.So in you SDK manager check if you have Android 4.4.2(API 19) installed. If you want your target API version to be different then change it in ANdroidManifest.xml
<uses-sdk
android:minSdkVersion="16"
android:targetSdkVersion="18" />
Edit these lines. Here...
How to properly assert that an exception gets raised in pytest?
...==================================
platform linux2 -- Python 2.7.6 -- py-1.4.26 -- pytest-2.6.4
collected 7 items
test.py ..FF..F
=================================================================================================== FAILURES ==========================================================...