大约有 46,000 项符合查询结果（耗时：0.0472秒） [XML]
How can I detect if this dictionary key exists in C#?
...if (entry.Street != null)
{
row["HomeStreet"] = entry.Street.ToString();
}
}
...with the inner conditional repeated as necessary for each key required. The TryGetValue is only done once per PhysicalAddressKey (Home, Work, etc).
...
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...
Prompt for user input in PowerShell
...
Read-Host is a simple option for getting string input from a user.
$name = Read-Host 'What is your username?'
To hide passwords you can use:
$pass = Read-Host 'What is your password?' -AsSecureString
To convert the password to plain text:
[Runtime.InteropServ...
Visual Studio debugger - Displaying integer values in Hex
...e', and nq for displaying with 'no quotes.' They can be used together:
my_string_func(),ac,nq
nq is useful inside DebuggerDisplay attributes, which can appear on a class:
[DebuggerDisplay("{my_string_func(),nq}")]
class MyClass
{
/* ...example continues below... */
...or on one or more fie...
How to bind a List to a ComboBox?
...ng (if so, look at using a BindingList)
public class Country
{
public string Name { get; set; }
public IList<City> Cities { get; set; }
public Country(string _name)
{
Cities = new List<City>();
Name = _name;
}
}
List<Country> countries = new...
Ruby arrays: %w vs %W
...es and escapes characters like #. '#{foo}' and "\#{foo}" give you the same string, which you can verify with '#{foo}' == "\#{foo}" in irb.
– Brian Campbell
Dec 4 '16 at 5:37
...
How to get the name of a class without the package?
...name of the underlying class as given in the source code. Returns an empty string if the underlying class is anonymous.
The simple name of an array is the simple name of the component type with "[]" appended. In particular the simple name of an array whose component type is anonymous is "[]".
It is...
Why do most fields (class members) in Android tutorial start with `m`?
... Use m prefix for non-public and non-static fields.
When to Use?
private String mCityName;
private float mTemperature;
When not to Use?
public static int mFirstNumber;
public static final String mDATABASE_NAME;
What I do?
Personally, I don't use it. It makes the code more complicated and cha...
Pass parameter to fabric task
...
The quotes aren't necessary; all arguments are strings: "since this process involves string parsing, all values will end up as Python strings, so plan accordingly. (We hope to improve upon this in future versions of Fabric, provided an intuitive syntax can be found.)"
...
json_encode/json_decode - returns stdClass instead of Array in PHP
...lue "things" and has a property "things" with it's value being an array of strings ([] = array).
JSON (as JavaScript) doesn't know associative arrays only indexed arrays. So when JSON encoding a PHP associative array, this will result in a JSON string containing this array as an "object".
Now we're ...