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Visual Studio popup: “the operation could not be completed”
...tructor of your custom controls even at design time, and weird things can happen (at design time some properties dont works, your connection string probably isn't populated...)
As a last resort...
Try to install any VS update
Try to disable VS extensions (if you installed any...)
Try to update...
What is the reason not to use select *?
... join
The corollary is that using select * ...
The columns used by the application is opaque
DBA's and their query profilers are unable to help your application's poor performance
The code is more brittle when changes occur
Your database and network are suffering because they are bringing back t...
Two-way encryption: I need to store passwords that can be retrieved
I am creating an application that will store passwords, which the user can retrieve and see. The passwords are for a hardware device, so checking against hashes are out of the question.
...
How can I make a weak protocol reference in 'pure' Swift (without @objc)
...ss a protocol is declared as @objc , which I don't want in a pure Swift app.
6 Answers
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What's “tools:context” in Android layout files?
... more than one, but at least one. In the tool, we need to know about this mapping (which at runtime happens in the other direction; an activity can call setContentView(layout) to display a layout) in order to drive certain features.
Right now, we're using it for one thing only: Picking the right th...
GSON throwing “Expected BEGIN_OBJECT but was BEGIN_ARRAY”?
...tle);
}
}
}
and finally MainActivity.java
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import java.util.ArrayList;
import java.util.Array...
What is the difference between #import and #include in Objective-C?
...s a binary representation of the module and makes its API available to the application directly. Preprocessor definitions that precede the import declaration have no impact on the API provided... because the module itself was compiled as a separate, standalone module. Additionally, any linker flags ...
Difference between require, include, require_once and include_once?
...
Use
require
when the file is required by your application, e.g. an important message template or a file containing configuration variables without which the app would break.
require_once
when the file contains content that would produce an error on subsequent inclusion, ...
Strip HTML from strings in Python
...ut it, it will match the entire string <..Hello..>.
If non-tag < appears in html (eg. 2 < 3), it should be written as an escape sequence &... anyway so the ^< may be unnecessary.
share
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Plain Old CLR Object vs Data Transfer Object
...mple of the use of this pattern.
Here's the difference: POCO describes an approach to programming (good old fashioned object oriented programming), where DTO is a pattern that is used to "transfer data" using objects.
While you can treat POCOs like DTOs, you run the risk of creating an anemic doma...