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add column to mysql table if it does not exist
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OK this is really crude but someone's got to say it. if you are simply running a SQL script from the command line, you can give mysql the --force switch, which means keep going even if there's an error. then, just go for it. you just want...
Finding the source code for built-in Python functions?
...out what file a particular module or function is implemented in you can usually print the __file__ attribute. Alternatively, you may use the inspect module, see the section Retrieving Source Code in the documentation of inspect.
For built-in classes and methods this is not so straightforward since ...
Can I get a patch-compatible output from git-diff?
... -p option):
git diff --no-prefix [<other git-diff arguments>]
Usually though, it is easier to use straight git diff and then use the output to feed to git apply.
Most of the time I try to avoid using textual patches. Usually one or more of temporary commits combined with rebase, git stash...
Location of parenthesis for auto-executing anonymous JavaScript functions?
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They're virtually the same.
The first wraps parentheses around a function to make it a valid expression and invokes it. The result of the expression is undefined.
The second executes the function and the parentheses around the automati...
How to do stateless (session-less) & cookie-less authentication?
...ry request to authenticate the user. This, in my opinion, is unsafe, especially if the application isn't single page. It is also not scalable, especially if you want to add authorization to your app in addition to authentication in the future (although I guess you could build something based on logi...
Open URL in same window and in same tab
...ute target= of tag a. In fact, you can name your window whatever you like. All what you need is set it different value, so that it won't open in the same window or tab.
– ijse
Dec 10 '11 at 14:57
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What's the difference between belongs_to and has_one?
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They essentially do the same thing, the only difference is what side of the relationship you are on. If a User has a Profile, then in the User class you'd have has_one :profile and in the Profile class you'd have belongs_to :user. To det...
Chrome Extension Message passing: response not sent
...will keep the message channel open to the other end until sendResponse is called).
So you just need to add return true; after the call to getUrls to indicate that you'll call the response function asynchronously.
share
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how to specify local modules as npm package dependencies
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npm install now supports this
npm install --save ../path/to/mymodule
For this to work mymodule must be configured as a module with its own package.json. See Creating NodeJS modules.
As of npm 2.0, local dependencies are supported...
How to bind multiple values to a single WPF TextBlock?
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@Preet - I'm actually not certain if the '{}' is necessary in this case, I included it since it was used on the MSDN sample. In general however, it is needed as an escape sequence for the XAML parser to avoid confusion with the Binding marku...
