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What's the @ in front of a string in C#?
...string verbatim = @"foo\bar";
string regular = "foo\\bar";
Here verbatim and regular have the same contents.
It also allows multi-line contents - which can be very handy for SQL:
string select = @"
SELECT Foo
FROM Bar
WHERE Name='Baz'";
The one bit of escaping which is necessary for verbatim s...
When should I use a composite index?
..._C )
will benefit a query that uses those fields for joining, filtering, and sometimes selecting. It will also benefit queries that use left-most subsets of columns in that composite. So the above index will also satisfy queries that need
index( column_A, column_B, column_C )
index( column_A, col...
How to run a PowerShell script without displaying a window?
...he window called PsRun.exe that does exactly that. You can download source and exe file Run scheduled tasks with WinForm GUI in PowerShell. I use it for scheduled tasks.
Edited: as Marco noted this -windowstyle parameter is available only for V2.
...
Android get color as string value
...g(R.color.color_name);
This will return the color in a string format.
To convert that to a color in integer format (sometimes only integers are accepted) then:
Color.parseColor(getString(R.color.color_name));
The above expression returns the integer equivalent of the color defined in color.xml ...
Releasing memory in Python
...llocator. The int type maintains a freelist with its own allocated memory, and clearing it requires calling PyInt_ClearFreeList(). This can be called indirectly by doing a full gc.collect.
Try it like this, and tell me what you get. Here's the link for psutil.Process.memory_info.
import os
import...
Javascript: negative lookbehind equivalent?
...le Chrome 62.0
✔️ Microsoft Edge 79.0
✔️ Node.js 6.0 behind a flag and 9.0 without a flag
✔️ Deno (all versions)
✔️ SpiderMonkey
✔️ Mozilla Firefox 78.0
????️ JavaScriptCore: Apple is working on it
????️ Apple Safari
????️ iOS WebView (all browsers on iOS + iPadOS)
...
Checking if an object is a given type in Swift
I have an array that is made up of AnyObject . I want to iterate over it, and find all elements that are array instances.
...
UIPanGestureRecognizer - Only vertical or horizontal
...tyInView:someView];
return fabs(velocity.y) > fabs(velocity.x);
}
And for Swift:
func gestureRecognizerShouldBegin(_ gestureRecognizer: UIPanGestureRecognizer) -> Bool {
let velocity = gestureRecognizer.velocity(in: someView)
return abs(velocity.x) > abs(velocity.y)
}
...
How do I make XAML DataGridColumns fill the entire DataGrid?
...
Gives an Error Sting cannot be converted to '*'
– co2f2e
Feb 5 '16 at 9:07
|
show 3 more comment...
Getting only 1 decimal place [duplicate]
How do I convert 45.34531 to 45.3 ?
3 Answers
3
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