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Cannot add or update a child row: a foreign key constraint fails
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It means that you're trying to insert into table2 a UserID value that doesn't exist in table1....
Purpose of #!/usr/bin/python3
...t the shebang line.
You can use #!/usr/bin/env python3 for portability across different systems in case they have the language interpreter installed in different locations.
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Way to get all alphabetic chars in an array in PHP?
...118] => DO [119] => DP [120] => DQ [121] => DR [122] => DS [123] => DT [124] => DU )
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Remote debugging with Android emulator
Is it possible to write the code/compile Android application on one machine and debug it remotely on the emulator launched on another? I'm sick and tired of the emulator constantly eating half of my laptop's CPU.
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Is It Possible to NSLog C Structs (Like CGRect or CGPoint)?
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With AppKit on OS X you would need to convert to an NSPoint and then call NSStringFromPoint. For example: NSStringFromPoint(NSPointFromCGPoint(point))
– Alex
Aug 22 '12 at 17:56
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How to connect to my http://localhost web server from Android Emulator
What can I do in the Android emulator to connect it to my localhost web server page at http://localhost or http://127.0.0.1 ?
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Bash script to cd to directory with spaces in pathname
I'm using Bash on macOS X and I'd like to create a simple executable script file that would change to another directory when it's run. However, the path to that directory has spaces in it. How the heck do you do this? This is what I have...
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Adding Python Path on Windows 7
...out and back in after setting the Path variable.
– dk123
Nov 5 '13 at 2:34
Suffering a similar problem, had done every...
How to remove all subviews of a view in Swift?
...T: (thanks Jeremiah / Rollo)
By far the best way to do this in Swift for iOS is:
view.subviews.forEach({ $0.removeFromSuperview() }) // this gets things done
view.subviews.map({ $0.removeFromSuperview() }) // this returns modified array
^^ These features are fun!
let funTimes = ["Awesome","Craz...
'npm' is not recognized as internal or external command, operable program or batch file
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Don't forget to reboot your computer after installing node! That one got me.
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