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Entity framework linq query Include() multiple children entities
...e to preserve your sanity.
Obsolete Info (Don't do this):
The multiple grandchildren loading could be done in one step, but this requires a rather awkward reversal back up the graph before heading down the next node (NB: This does NOT work with AsNoTracking() - you'll get a runtime error):
var co...
What is the purpose of “return await” in C#?
...
There is one sneaky case when return in normal method and return await in async method behave differently: when combined with using (or, more generally, any return await in a try block).
Consider these two versions of a method:
Task<SomeResult> DoSomethingAsync()
{
u...
Null check in an enhanced for loop
...ecause an empty list won't fail.
If you get this list from somewhere else and don't know if it is ok or not you could create a utility method and use it like this:
for( Object o : safe( list ) ) {
// do whatever
}
And of course safe would be:
public static List safe( List other ) {
ret...
Update a column value, replacing part of a string
...images/%');
means all records that BEGIN with "...//domain1.com/images/" and have anything AFTER (that's the % for...)
Another example:
LIKE ('%http://domain1.com/images/%')
which means all records that contains "http://domain1.com/images/"
in any part of the string...
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How can I find an element by CSS class with XPath?
...er element name you actually wish to match, unless you wish to search each and every element in the document for the given condition.
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Android ListView not refreshing after notifyDataSetChanged
...Menu(true);
getActivity().setTitle(TITLE);
dbHelper = new DatabaseHandler(getActivity());
adapter = new ItemAdapter(getActivity(), dbHelper.getItems());
setListAdapter(adapter);
}
3) add method in ItemAdapter:
public void swapItems(List<Item> items) {
this.items = items;...
In MVC, how do I return a string result?
...Practice", could you please explain the difference between the your answer and @swilliam 's
– David Perlman
Nov 11 '12 at 9:59
9
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How to determine if object is in array [duplicate]
... }
}
return false;
}
In this case, containsObject(car4, carBrands) is true. Remove the carBrands.push(car4); call and it will return false instead. If you later expand to using objects to store these other car objects instead of using arrays, you could use something like this instead...
LISTAGG in Oracle to return distinct values
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19c and later:
select listagg(distinct the_column, ',') within group (order by the_column)
from the_table
18c and earlier:
select listagg(the_column, ',') within group (order by the_column)
from (
select distinct the_colum...
java get file size efficiently
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Well, I tried to measure it up with the code below:
For runs = 1 and iterations = 1 the URL method is fastest most times followed by channel. I run this with some pause fresh about 10 times. So for one time access, using the URL is the fastest way I can think of:
LENGTH sum: 10626, per It...