大约有 47,000 项符合查询结果（耗时：0.0625秒） [XML]
What is SuppressWarnings (“unchecked”) in Java?
... onto the class itself or onto a long method). An example:
public List<String> getALegacyListReversed() {
@SuppressWarnings("unchecked") List<String> list =
(List<String>)legacyLibrary.getStringList();
Collections.reverse(list);
return list;
}
...
What is [Serializable] and when should I use it?
...from one domain to another, passing an object through a firewall as an XML string, or maintaining security or user-specific information across applications.
Apply SerializableAttribute to a type to indicate that instances of this type can be serialized. Apply the SerializableAttribute even if the cl...
Is there any difference between DECIMAL and NUMERIC in SQL Server?
...
They are the same. Numeric is functionally equivalent to decimal.
MSDN: decimal and numeric
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Easiest way to convert a List to a Set in Java
...mport java.util.Set;
public class ListToSet
{
public static void main(String[] args)
{
List<String> alphaList = new ArrayList<String>();
alphaList.add("A");
alphaList.add("B");
alphaList.add("C");
alphaList.add("A");
alphaList.add(...
How can I present a file for download from an MVC controller?
...r the file exists or you create it on the fly.
public ActionResult GetPdf(string filename)
{
return File(filename, "application/pdf", Server.UrlEncode(filename));
}
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Read-only list or unmodifiable list in .NET 4.0
...oking for ReadOnlyCollection, which has been around since .NET2.
IList<string> foo = ...;
// ...
ReadOnlyCollection<string> bar = new ReadOnlyCollection<string>(foo);
or
List<string> foo = ...;
// ...
ReadOnlyCollection<string> bar = foo.AsReadOnly();
This creates...
How to query nested objects?
...iness logic, then run a single query at the end: find(conditions, fields, callback);
– Ryan Wheale
May 21 '14 at 2:17
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Git: Show all of the various changes to a single line in a specified file over the entire git histor
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@AndySong - If the string you are searching for is unique enough, perhaps you can just leave off the file name and still get what you're looking for.
– rob
Jul 21 '13 at 16:25
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Rails: How do I create a default value for attributes in Rails activerecord's model? [duplicate]
... default option for the column in the migration
....
add_column :status, :string, :default => "P"
....
OR
You can use a callback, before_save
class Task < ActiveRecord::Base
before_save :default_values
def default_values
self.status ||= 'P' # note self.status = 'P' if self.status....
Mapping enum to string in hibernate
...
Yes, is possible. It should be:
@Enumerated(EnumType.STRING)
@Column(name = "category_type")
private CategoryType categoryType;
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