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Checking for empty queryset in Django
... working on with a huge database, not orgs is 400+ ms and orgs.count() is 250ms. In my most common use cases (those where there are results), this technique often gets that down to under 20ms. (One case I found, it was 6.)
Could be much longer, of course, depending on how far the database has to lo...
How to automatically add user account AND password with a Bash script?
...ds.
– ThorSummoner
Aug 31 '15 at 18:50
2
You can also salt the password: useradd -m -p $(openssl ...
Hide grid row in WPF
...nd -->
– Kay Zed
Mar 25 '16 at 4:50
2
I don't think this is the clearest and most readable sol...
Programmatically change input type of the EditText from PASSWORD to NORMAL & vice versa
...answer
– nAkhmedov
Mar 17 '15 at 14:50
2
If the user is editing the middle of the password field,...
Convert between UIImage and Base64 string
...-> String {
let imageData:NSData = UIImageJPEGRepresentation(img, 0.50)! as NSData //UIImagePNGRepresentation(img)
let imgString = imageData.base64EncodedString(options: .init(rawValue: 0))
return imgString
}
Decoding
func convertBase64StringToImage (imageBase64String:String) -> U...
Output data from all columns in a dataframe in pandas [duplicate]
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answered Jul 6 '12 at 16:50
K RaphaelK Raphael
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What is the best comment in source code you have ever encountered? [closed]
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answered Nov 25 '08 at 2:50
community wiki
joh...
IEnumerable and Recursion using yield return
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+50
As Jon Skeet and Colonel Panic note in their answers, using yield return in recursive methods may cause performance problems if the t...
UIScrollView not scrolling
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answered Nov 2 '12 at 5:50
user1539652user1539652
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How to Set Opacity (Alpha) for View in Android
...the opacity in your code, use
myButton.getBackground().setAlpha(128); // 50% transparent
Where the INT ranges from 0 (fully transparent) to 255 (fully opaque).
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