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Strangest language feature
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In JavaScript, the following construct
return
{
id : 1234,
title : 'Tony the Pony'
};
returns undefined is a syntax error due to the sneaky implicit semicolon insertion on the newline after return. The following works as you would expect though:
return {
id : 1234,
title :...
Why would a post-build step (xcopy) occasionally exit with code 2 in a TeamCity build?
...copy like this without echo D(which isn't reliable): XCOPY $(ProjectDir)..\scripts* $(TargetDir)scripts* /Y /R . Or do the copy like this without echo F: XCOPY D:\file.zip c:\renamedFile.zip /Y /R
– leetNightshade
Jul 25 '13 at 15:54
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Detect permission of camera in iOS
... - Alert
let cameraUnavailableAlertController = UIAlertController (title: "Camera Unavailable", message: "Please check to see if it is disconnected or in use by another application", preferredStyle: .Alert)
let settingsAction = UIAlertAction(title: "Settings", style: .Destructive) { (_) -&g...
What's the algorithm to calculate aspect ratio?
I plan to use it with JavaScript to crop an image to fit the entire window.
18 Answers
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Is there an easy way to return a string repeated X number of times?
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This is a very useful trick of C#, but the title of the question is asking about a string (not a char). The other answers below this one are actually answering the question, but are rated much lower. I'm not trying to disrespect Ahmad's answer, but I think either ...
How to check if a database exists in SQL Server?
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From a Microsoft's script:
DECLARE @dbname nvarchar(128)
SET @dbname = N'Senna'
IF (EXISTS (SELECT name
FROM master.dbo.sysdatabases
WHERE ('[' + name + ']' = @dbname
OR name = @dbname)))
-- code mine :)
PRINT 'db exists'
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How to line-break from css, without using ?
...nt: no extra markup.
In a blockquote, the example below displays both the title and the source link and separate the two with a carriage return ("\a"):
blockquote[title][cite]:after {
content:attr(title)"\a"attr(cite)
}
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How to set size for local image using knitr for markdown?
...h Pandoc . Per this post , this will insert the local image :
8 Answers
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How to convert a string to lower case in Bash?
... on a few other systems too. I've been doing a lot of cross-platform shell scripting lately, and with the requirement that nothing extra be installed it makes things very tricky! However I've yet to encounter a system without sed
– Haravikk
Jun 15 '14 at 10:51
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Teachable Machine 图像分类扩展 · App Inventor 2 中文网
... function HideORDispFeedback() { $("#feedback").toggle();}function makeTitleDraggable(element, titleElement) { let isDragging = false; let offsetX, offsetY; // 只在标题栏上按下时开始拖动 titleElement.onmousedown = function(e) { isDragging = true; offset...