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Add Foreign Key to existing table

... Do not just run "SET FOREIGN_KEY_CHECKS=0;" if you get the error "a foreign key constraint fails", you obviously have bad data that you must fix or else you will get bigger problems down the line. – MazeChaZer Jun 11 '18 at 12:05 ...
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Running Python on Windows for Node.js dependencies

... Your problem is that you didn't set the environment variable. The error clearly says this: gyp ERR! stack Error: Can't find Python executable "python", you can set the PYTHON env variable. And in your comment, you say you did this: set PYTHONPATH=%PYTHONPATH%;C:\My_python_lib That's n...
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Passing multiple error classes to ruby's rescue clause in a DRY fashion

...nt to access the exception instance, use this syntax: rescue InvalidRequestError, CardError => e (see mikeferrier.com/2012/05/19/…) – Peter Ehrlich Oct 11 '12 at 16:37 1 ...
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Number of occurrences of a character in a string [duplicate]

... the number of occurrences of a certain character such as & in the following string. 6 Answers ...
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A method to reverse effect of java String.split()? [duplicate]

I am looking for a method to combine an array of strings into a delimited String. An opposite to split(). 16 Answers ...
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How to specify a editor to open crontab file? “export EDITOR=vi” does not work

I'm using Red Hat Enterprise Linux 5, and I want to set the vim editor to edit the crontab file. 8 Answers ...
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how to get android screen size programmatically, once and for all?

How can I find out my screen size programmatically, in the units used by touch events and View measurement/layout? In other words, I want the coordinates of the bottom-right corner of the screen, in the coordinate system used by touch events' getRawX()/getRawY() and View.getLocationOnScreen() . ...
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What exceptions should be thrown for invalid or unexpected parameters in .NET?

...ed about what went wrong, why it is wrong, and how to fix it. I love when error messages point to help, documentation, or other resources. For example, Microsoft did a good first step with their KB articles, e.g. “Why do I receive an "Operation aborted" error message when I visit a Web page in In...
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How to make a DIV visible and invisible with JavaScript

Can you do something like 7 Answers 7 ...
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How do I add PHP code/file to HTML(.html) files?

I can't use PHP in my HTML pages. For example, index.html . I've tried using both: 12 Answers ...