大约有 46,000 项符合查询结果（耗时：0.0604秒） [XML]
Does Parallel.ForEach limit the number of active threads?
...ntBag<int> monitorOut = new ConcurrentBag<int>();
var arrayStrings = new string[1000];
Parallel.ForEach<string>(arrayStrings, someString =>
{
monitor.Add(monitor.Count);
monitor.TryTake(out int result);
monitorOut.Add(result);
});
Con...
What is the difference between named and positional parameters in Dart?
... [ ] is a positional optional parameter. Here is an example:
getHttpUrl(String server, String path, [int port=80]) {
// ...
}
In the above code, port is optional and has a default value of 80.
You can call getHttpUrl with or without the third parameter.
getHttpUrl('example.com', '/index.htm...
Concatenate a vector of strings/character
...f I have a vector of type character, how can I concatenate the values into string? Here's how I would do it with paste() :
...
What's the difference between ngModel.$modelValue and ngModel.$viewValue
...fference. It is this:
As you already noted above:
$viewValue: Actual string (or Object) value in the view.
$modelValue: The value in the model, that the control is bound to.
I'm going to assume that your ngModel is referring to an <input /> element...? So your <input> has a st...
Write bytes to file
I have a hexadecimal string (e.g 0CFE9E69271557822FE715A8B3E564BE ) and I want to write it to a file as bytes. For example,
...
ASP.NET MVC 4 Custom Authorize Attribute with Permission Codes (without roles)
...rizeUserAttribute : AuthorizeAttribute
{
// Custom property
public string AccessLevel { get; set; }
protected override bool AuthorizeCore(HttpContextBase httpContext)
{
var isAuthorized = base.AuthorizeCore(httpContext);
if (!isAuthorized)
{
...
C++ where to initialize static const
... unit (usually a .cpp file) would do:
foo.h
class foo {
static const string s; // Can never be initialized here.
static const char* cs; // Same with C strings.
static const int i = 3; // Integral types can be initialized here (*)...
static const int j; // ... OR in cpp.
};
f...
Best way to generate random file names in Python
...
You could use the UUID module for generating a random string:
import uuid
filename = str(uuid.uuid4())
This is a valid choice, given that an UUID generator is extremely unlikely to produce a duplicate identifier (a file name, in this case):
Only after generating 1 billion...
Use “ENTER” key on softkeyboard instead of clicking button
...="fill_parent"
android:layout_height="wrap_content"
android:hint="@string/search_hint"
android:inputType="text"
android:imeOptions="actionSend" />
You can then listen for presses on the action button by defining a TextView.OnEditorActionListener for the EditText element. In your...
Javascript object Vs JSON
...nderstand the basic differences clearly between Javascript object and JSON string.
5 Answers
...