大约有 16,000 项符合查询结果（耗时：0.0299秒） [XML]
ObservableCollection Doesn't support AddRange method, so I get notified for each item added, besides
... index.
''' </summary>
Public Sub InsertRange(ByVal index As Integer, ByVal Collection As IEnumerable(Of T))
Dim ce As New NotifyCollectionChangingEventArgs(Of T)(NotifyCollectionChangedAction.Add, Collection)
OnCollectionChanging(ce)
If ce.Cancel Then Exit Sub
...
Last iteration of enhanced for loop in java
...lly want concatenation here, and StringBuilder has a perfectly good append(int) overload.)
int[] array = {1, 2, 3...};
StringBuilder builder = new StringBuilder();
for (int i : array) {
if (builder.length() != 0) {
builder.append(",");
}
builder.append(i);
}
The nice thing ab...
Try-finally block prevents StackOverflowError
...y calls
foo() which fails to call foo()
To work each level into the finally block take twice as long an the stack depth could be
10,000 or more. If you can make 10,000,000 calls per second, this will take 10^3003 seconds or longer than the age of the universe.
...
Unique Key constraints for multiple columns in Entity Framework
... can now do this:
[Index("IX_FirstAndSecond", 1, IsUnique = true)]
public int FirstColumn { get; set; }
[Index("IX_FirstAndSecond", 2, IsUnique = true)]
public int SecondColumn { get; set; }
The second parameter in the attribute is where you can specify the order of the columns in the index.
Mor...
Is there a built-in method to compare collections?
...lowing expression checks if two dictionaries are equal regardless of their internal order:
dictionary1.OrderBy(kvp => kvp.Key).SequenceEqual(dictionary2.OrderBy(kvp => kvp.Key))
EDIT: As pointed out by Jeppe Stig Nielsen, some object have an IComparer<T> that is incompatible with th...
What does the “map” method do in Ruby?
...example:
names = ['danil', 'edmund']
# here we map one array to another, convert each element by some rule
names.map! {|name| name.capitalize } # now names contains ['Danil', 'Edmund']
names.each { |name| puts name + ' is a programmer' } # here we just do something with each element
The output:...
Getting Http Status code number (200, 301, 404, etc.) from HttpWebRequest and HttpWebResponse
...
Console.Write((int)response.StatusCode);
HttpStatusCode (the type of response.StatusCode) is an enumeration where the values of the members match the HTTP status codes, e.g.
public enum HttpStatusCode
{
...
Moved = 301,
OK = ...
How to add leading zeros?
...
Note that sprintf converts numeric to string (character).
– aL3xa
Apr 28 '11 at 8:54
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Items in JSON object are out of order using “json.dumps”?
I'm using json.dumps to convert into json like
6 Answers
6
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Easy way to concatenate two byte arrays
...a billion times a second - sure, optimize it. Otherwise, readability and maintainability might be the winning considerations.
– vikingsteve
Dec 6 '13 at 15:35
5
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