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When NOT to use yield (return) [duplicate]
...ined structures. For example, I often see this:
public static IEnumerable<T> PreorderTraversal<T>(Tree<T> root)
{
if (root == null) yield break;
yield return root.Value;
foreach(T item in PreorderTraversal(root.Left))
yield return item;
foreach(T item in Pr...
LINQ to Entities only supports casting EDM primitive or enumeration types with IEntity interface
...ension method. I'm not sure why it works, though.
public static T GetById<T>(this IQueryable<T> collection, Guid id)
where T : class, IEntity
{
//...
}
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How to change line color in EditText
...ted"
UPDATE 2
For API 21 or higher, you can use android:backgroundTint
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Underline color change"
android:backgroundTint="@android:color/holo_red_light" />
Update ...
Convert from List into IEnumerable format
...
You don't need to convert it. List<T> implements the IEnumerable<T> interface so it is already an enumerable.
This means that it is perfectly fine to have the following:
public IEnumerable<Book> GetBooks()
{
List<Book> books = Fet...
Can you get the column names from a SqlDataReader?
...
var reader = cmd.ExecuteReader();
var columns = new List<string>();
for(int i=0;i<reader.FieldCount;i++)
{
columns.Add(reader.GetName(i));
}
or
var columns = Enumerable.Range(0, reader.FieldCount).Select(reader.GetName).ToList();
...
How can I iterate over an enum?
... ( int fooInt = One; fooInt != Last; fooInt++ )
{
Foo foo = static_cast<Foo>(fooInt);
// ...
}
Please note, the enum Last is meant to be skipped by the iteration. Utilizing this "fake" Last enum, you don't have to update your terminating condition in the for loop to the last "real" enu...
Width equal to content [duplicate]
...
By default p tags are block elements, which means they take 100% of the parent width.
You can change their display property with:
#container p {
display:inline-block;
}
But it puts the elements side by side.
To keep each ele...
Jade: Links inside a paragraph
I'm trying to author a few paragraphs with Jade, but finding it difficult when there are links inside a paragraph.
13 Answ...
How to make a Java Generic method static?
... appendToArray a static method. Adding static to the method signature results in compile errors.
4 Answers
...
How to detect when WIFI Connection has been established in Android?
... (or if the connection changed).
Register the BroadcastReceiver:
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(WifiManager.SUPPLICANT_CONNECTION_CHANGE_ACTION);
registerReceiver(broadcastReceiver, intentFilter);
And then in your BroadcastReceiver do something like this:
...