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Reasons that the passed Intent would be NULL in onStartCommand
Is there any other reason that the Intent that is passed to onStartCommand(Intent, int, int) would be NULL besides the system restarting the service via a flag such as START_STICKY ?
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Which is better, number(x) or parseFloat(x)?
... they had typed '1'. The only time I really make an exception is when I am converting a style to a number, in which case parseFloat is helpful because styles come in a form like '3px', in which case I want to drop the 'px' part and just get the 3, so I find parseFloat helpful here. But really which ...
@Html.HiddenFor does not work on Lists in ASP.NET MVC
... come across this issue and solved it simply by doing the following:
@for(int i = 0; i < Model.ToGroups.Length; i++)
{
@Html.HiddenFor(model => Model.ToGroups[i])
}
By using a for instead of a foreach the model binding will work correctly and pick up all of your hidden values in the lis...
What is the best way to clone/deep copy a .NET generic Dictionary?
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Dictionary<string, int> dictionary = new Dictionary<string, int>();
Dictionary<string, int> copy = new Dictionary<string, int>(dictionary);
share...
Possible Loss of Fraction
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When you divide two int's into a floating point value the fraction portion is lost. If you cast one of the items to a float, you won't get this error.
So for example turn 10 into a 10.0
double returnValue = (myObject.Value / 10.0);
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Multi-gradient shapes
...new ShapeDrawable.ShaderFactory() {
@Override
public Shader resize(int width, int height) {
LinearGradient lg = new LinearGradient(0, 0, width, height,
new int[]{Color.GREEN, Color.GREEN, Color.WHITE, Color.WHITE},
new float[]{0,0.5f,.55f,1}, Shader.TileMode.R...
Benefits of using the conditional ?: (ternary) operator
...er the if/else equivalent without sacrificing readability.
Good example:
int result = Check() ? 1 : 0;
Bad example:
int result = FirstCheck() ? 1 : SecondCheck() ? 1 : ThirdCheck() ? 1 : 0;
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Obtaining a powerset of a set in Java
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return sets;
}
And a test, given your example input:
Set<Integer> mySet = new HashSet<Integer>();
mySet.add(1);
mySet.add(2);
mySet.add(3);
for (Set<Integer> s : SetUtils.powerSet(mySet)) {
System.out.println(s);
}
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Reason to Pass a Pointer by Reference in C++?
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You would want to pass a pointer by reference if you have a need to modify the pointer rather than the object that the pointer is pointing to.
This is similar to why double pointers are used; using a reference to a pointer is slightly safer than using...
Get filename and path from URI from mediastore
...ntext.getContentResolver().query(contentUri, proj, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
} finally {
if (cursor != null) {
cursor.close();
}
}
}
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