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Installing R with Homebrew
I'm trying to install R using Homebrew. I ran these commands which are recommended elsewhere on SO:
12 Answers
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How do I filter ForeignKey choices in a Django ModelForm?
... can populate the validation data by making using the super(...).__init__ call in your overridden method. If you are making several of these queryset changes its a lot more elegant to package them by overriding the init method.
– michael
Aug 7 '09 at 4:53
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Why 0 is true but false is 1 in the shell?
The above will output 1 , which is contradictory with all other programming languages I know.
10 Answers
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Create a submodule repository from a folder and keep its git commit history
...ommit it
git filter-branch --subdirectory-filter <directory 1> -- --all
You should now have a git repository with the files from directory 1 in your repo's root with all related commit history.
Step 4
Create your online repository and push your new repository!
git remote add origin <...
Do you get charged for a 'stopped' instance on EC2? [closed]
...nce
– steampowered
Oct 29 '15 at 15:32
16
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Shards and replicas in Elasticsearch
...e need to create an index.
When you create an index (an index is automatically created when you index the first document as well) you can define how many shards it will be composed of. If you don't specify a number it will have the default number of shards: 5 primaries. What does it mean?
It mean...
Why `null >= 0 && null
... number and assigns 0 to the variable if not, where the variable is initially null or undefined .
5 Answers
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The maximum recursion 100 has been exhausted before statement completion
...he end of the query:
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from EmployeeTree
option (maxrecursion 0)
That allows you to specify how often the CTE can recurse before generating an error. Maxrecursion 0 allows infinite recursion.
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How to delete all the rows in a table using Eloquent?
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The reason MyModel::all()->delete() doesn't work is because all() actually fires off the query and returns a collection of Eloquent objects.
You can make use of the truncate method, this works for Laravel 4 and 5:
MyModel::truncate();
Th...
How to darken a background using CSS?
....png);
}
Reference: linear-gradient() - CSS | MDN
UPDATE: Not all browsers support RGBa, so you should have a 'fallback color'. This color will be most likely be solid (fully opaque) ex:background:rgb(96, 96, 96). Refer to this blog for RGBa browser support.
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