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How to implement a unique index on two columns in rails

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How can I change the copyright template in Xcode 4?

...r-project basis. If you select the project in the Project Navigator (Cmd-1) and open the File Inspector (Cmd-Opt-1), you'll see a field for "Organization" under "Project Document". share | improve...
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What is the difference between origin and upstream on GitHub?

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Is there a python equivalent of Ruby's 'rvm'?

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Java 8 Stream and operation on arrays

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What is the usefulness of `enable_shared_from_this`?

...hen the object is deleted. enable_shared_from_this has become part of C++ 11 standard. You can also get it from there as well as from boost. share | improve this answer | fo...
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Is there an equivalent to CTRL+C in IPython Notebook in Firefox to break cells that are running?

... answered Jul 10 '13 at 5:40 seaotternerdseaotternerd 5,65222 gold badges3939 silver badges5757 bronze badges ...
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Using current time in UTC as default value in PostgreSQL

... answered May 17 '13 at 13:30 Daniel VéritéDaniel Vérité 46.6k1313 gold badges102102 silver badges123123 bronze badges ...
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Iterate over model instance field names and values in template

... 173 model._meta.get_all_field_names() will give you all the model's field names, then you can use ...
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Subversion stuck due to “previous operation has not finished”?

... 102 I've been in similar situations. Have you tried running cleanup from the root of your workspac...