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Undo scaffolding in Rails

... First, if you have already run the migrations generated by the scaffold command, you have to perform a rollback first. rake db:rollback You can create scaffolding using: rails generate scaffold MyFoo (or similar), and you can destroy/undo it using rails...
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Delete with Join in MySQL

Here is the script to create my tables: 13 Answers 13 ...
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How do browsers pause/change Javascript when tab or window is not active?

Background: I'm doing some user interface tests that need to detect if people are paying attention or not. But, this question is not about the page visibility API . ...
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Get current AUTO_INCREMENT value for any table

How do I get the current AUTO_INCREMENT value for a table in MySQL? 8 Answers 8 ...
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Why use the yield keyword, when I could just use an ordinary IEnumerable?

Given this code: 8 Answers 8 ...
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npm not working after clearing cache

Before clearing cache 11 Answers 11 ...
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How to perform Single click checkbox selection in WPF DataGrid?

I have a DataGrid with first column as text column and second column as CheckBox column. What I want is, if I click the check box. It should get checked. But, it takes two click to get selected, for first click the cell is getting selected, for the second clicks the check box is getting checked. ...
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Is there a difference between copy initialization and direct initialization?

Suppose I have this function: 9 Answers 9 ...
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How to recursively find and list the latest modified files in a directory with subdirectories and ti

I have several directories with several subdirectories and files in them. I need to make a list of all these directories that is constructed in a way such that every first-level directory is listed next to the date and time of the latest created/modified file within it. ...
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How to check if a value exists in a dictionary (python)

I have the following dictionary in python: 6 Answers 6 ...