大约有 40,000 项符合查询结果（耗时：0.0398秒） [XML]
Count with IF condition in MySQL query
I have two tables, one is for news and the other one is for comments and I want to get the count of the comments whose status has been set as approved.
...
How to get values from IGrouping
...umerables back into one IEnumerable all together:
List<smth> list = new List<smth>();
IEnumerable<IGrouping<int, smth>> groups = list.GroupBy(x => x.id);
IEnumerable<smth> smths = groups.SelectMany(group => group);
List<smth> newList = smths.ToList();
...
How do I convert Long to byte[] and back in java
...ly faster.
public static byte[] longToBytes(long l) {
byte[] result = new byte[8];
for (int i = 7; i >= 0; i--) {
result[i] = (byte)(l & 0xFF);
l >>= 8;
}
return result;
}
public static long bytesToLong(final byte[] bytes, final int offset) {
long r...
How do I join two SQLite tables in my Android application?
...able_b b ON a.id=b.other_id WHERE b.property_id=?";
db.rawQuery(MY_QUERY, new String[]{String.valueOf(propertyId)});
Use ? bindings instead of putting values into raw sql query.
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Redeploy alternatives to JRebel [closed]
JRebel allows for newly compiled code to be redeployed without restarting the application. I am wondering if there are any alternative (free?). The FAQ page answers this question, but I am sure it's biased towards JRebel. This question was asked a year ago on this site, but I am bringing it ba...
LINQ Select Distinct with Anonymous Types
...t; equals, Func<T,int> hashCode)
{
return items.Distinct(new DelegateComparer<T>(equals, hashCode));
}
public static IEnumerable<T> Distinct<T>(this IEnumerable<T> items,
Func<T, T, bool> equals)
{
return items.Distinct(...
Open directory dialog
...mind that it's in the System.Windows.Forms namespace.
using (var dialog = new System.Windows.Forms.FolderBrowserDialog())
{
System.Windows.Forms.DialogResult result = dialog.ShowDialog();
}
If you want the window to be modal over some WPF window, see the question How to use a FolderBrowserDia...
Difference between getContext() , getApplicationContext() , getBaseContext() and “this”
...hat is created around an existing Context using:
ContextWrapper wrapper = new ContextWrapper(context);
The benefit of using a ContextWrapper is that it lets you “modify behavior without changing the original Context”. For example, if you have an activity called myActivity then can create a Vi...
Check if a value is in an array (C#)
...rinter).Contains("Jupiter") which is more type-safe. The Linq approach was new in .NET 3.5.
– Jeppe Stig Nielsen
Nov 8 '16 at 13:01
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Get the last inserted row ID (with SQL statement) [duplicate]
I want to get the new created ID when you insert a new record in table.
3 Answers
3
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