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Cleaner way to do a null check in C#? [duplicate]
... You can also have this behaviour with a two parameter's methods in order to chain as many property as you want without overload : public static TNext GetNullOrValue<T, TNext>(this T item1, Func<T, TNext> getNextItem) where T : class { if (item1==null) return default(TNex...
Booleans, conditional operators and autoboxing
...oolean.
So, the first example tries to call Boolean.booleanValue() in order to convert Boolean to boolean as per the first rule.
In the second case the first operand is of the null type, when the second is not of the reference type, so autoboxing conversion is applied:
Otherwise, the s...
Avoiding if statement inside a for loop?
...
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Android image caching
...Connection();
connection.setUseCaches(true);
Object response = connection.getContent();
if (response instanceof Bitmap) {
Bitmap bitmap = (Bitmap)response;
}
Provides both memory and flash-rom cache, shared with the browser.
grr. I wish somebody had told ME that before i wrote my own cache man...
Unmarshaling nested JSON objects
...even if the simple cases look alike. The content of a XML tag is kinda:(An ordered map of sub-tags OR Text) AND an unordered map of attributes. JSON is much more like a Go struct. So mapping JSON to structs is much simpler: Just model the struct after your JSON.
– Volker
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How to check which locks are held on a table
...r
AND TL.request_mode <> 'S' -- Exclude simple shared locks
ORDER BY TL.resource_type
,TL.request_mode
,TL.request_type
,TL.request_status
,ObjectName
,ES.login_name;
--TSQL commands
SELECT
db_name(rsc_dbid) AS 'DATABASE_NAME',
...
javascript scroll event for iPhone/iPad?
...olled"); });
// or
window.onscroll = function() { alert("Scrolled"); };
// etc
(See also https://developer.apple.com/library/content/documentation/AppleApplications/Reference/SafariWebContent/HandlingEvents/HandlingEvents.html)
...
Is it safe to remove selected keys from map within a range loop?
...delete(m, key)
}
}
And the language specification:
The iteration order over maps is not specified and is not guaranteed to be the same from one iteration to the next. If map entries that have not yet been reached are removed during iteration, the corresponding iteration values will not be ...
Open-Source Examples of well-designed Android Applications? [closed]
...All of the applications delivered with Android (Calendar, Contacts, Email, etc) are all open-source, but not part of the SDK. The source for those projects is here: https://android.googlesource.com/ (look at /platform/packages/apps). I've referred to those sources several times when I've used an a...
Select + copy text in a TextView?
...diately, regardless of whether or not they select "Copy" from the menu. In order to copy only when the appropriate item was selected, you'd need to override onContextItemSelected() as well, or add a click handler to the menu item.
– Faisal
Jul 14 '11 at 17:19
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