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What does the [Flags] Enum Attribute mean in C#?
...n: 00000010
Red: 00000100
Blue: 00001000
Similarly, after you've set your property AllowedColors to Red, Green and Blue using the binary bitwise OR | operator, AllowedColors looks like this:
myProperties.AllowedColors: 00001110
So when you retrieve the value you are actually performing ...
how to fire event on file select
...<input type="file" id="file" name="file" />
//the JavaScript
/*resets the value to address navigating away from the page
and choosing to upload the same file */
$('#file').on('click touchstart' , function(){
$(this).val('');
});
//Trigger now when you have selected any file
$("#f...
How to disable/enable the sleep mode programmatically in iOS?
...ft 3.0 & Swift 4.0:
UIApplication.shared.isIdleTimerDisabled = true
Set it back to NO or false to re-enable sleep mode.
For example, if you need it until you leave the view you can set it back by overriding the viewWillDisappear:
override func viewWillDisappear(_ animated: Bool) {
UIApp...
Batch: Remove file extension
...e correct syntax). Anyway this will work in the context of the OP example: SET fl=%%f and then echo %fl:~0,-4%
– Ohad Schneider
Nov 23 '15 at 14:46
...
How to empty/destroy a session in rails?
I can't seem to find it anywhere... How do I delete/destroy/reset/empty/clear a user's session in Rails? Not just one value but the whole thing..
...
Measuring text width to be drawn on Canvas ( Android )
...e center of the screen. Anyway I just realized I could also have just used setTextAlign(Align.CENTER) on the Paint used to draw the text, it shifts the specified origin to the center of the drawn text. Thanks.
– NioX5199
Jul 15 '10 at 16:17
...
How do I drop table variables in SQL-Server? Should I even do this?
... is a solution
Declare @tablename varchar(20)
DECLARE @SQL NVARCHAR(MAX)
SET @tablename = '_RJ_TEMPOV4'
SET @SQL = 'DROP TABLE dbo.' + QUOTENAME(@tablename) + '';
IF EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(@tablename) AND type in (N'U'))
EXEC sp_executesql @SQL;
Works...
What is the difference between 0.0.0.0, 127.0.0.1 and localhost?
... via http://localhost:port . But for Jekyll , it seems that the default setting (e.g. 0.0.0.0:4000) requires Internet access. I cannot run Jekyll server without Internet. Is it a small bug?
...
Remove NA values from a vector
...
Trying ?max, you'll see that it actually has a na.rm = argument, set by default to FALSE. (That's the common default for many other R functions, including sum(), mean(), etc.)
Setting na.rm=TRUE does just what you're asking for:
d <- c(1, 100, NA, 10)
max(d, na.rm=TRUE)
If you do ...
Checking if output of a command contains a certain string in a shell script
...
@VitalyZdanevich, for one, testing $? doesn't set the preceding commands as "checked" for purposes of set -e or the ERR trap, so your program can exit in cases where you want it to simply return down the intentionally-false path later. For another, $? is volatile global ...