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Ruby on Rails: How do I add a not null constraint to an existing column using a migration?
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edited Jun 16 '19 at 18:52
answered Feb 15 '12 at 0:25
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SVN encrypted password store
...the passwords.
See: http://blogs.collab.net/subversion/2009/07/subversion-16-security-improvements/
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Git stash twice
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171
You can get a list of all stashes with
git stash list
which will show you something like
s...
How to insert element into arrays at specific position?
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214
array_slice() can be used to extract parts of the array, and the union array operator (+) can r...
Html code as IFRAME source rather than a URL
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152
You can do this with a data URL. This includes the entire document in a single string of HTML...
How do I add files without dots in them (all extension-less files) to the gitignore file?
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121
You can try a combination similar to:
*
!/**/
!*.*
That gitignore exclusion rule (a negated...
Prevent tabstop on A element (anchor link) in HTML
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Some browsers support the tabindex="-1" attribute, but not all of them, since this is not a standard behaviour.
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Browsers' default CSS for HTML elements
...of all W3C HTML spec and vendor default CSS stylesheets can be found here
1. Default Styles for Firefox
2. Default Styles for Internet Explorer
3. Default Styles for Chrome / Webkit
4. Default Styles for Opera
5. Default Styles for HTML4 (W3C spec)
6. Default Styles for HTML5 (W3C spec)
Sampl...
PostgreSQL delete with inner join
i am getting the following error PostgreSQL 8.2.11
5 Answers
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MySQL Multiple Joins in one query?
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216
You can simply add another join like this:
SELECT dashboard_data.headline, dashboard_data.mess...