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how to permit an array with strong parameters
...key to an empty array:
params.permit(:id => [])
In my app, the category_ids are passed to the create action in an array
"category_ids"=>["", "2"],
Therefore, when declaring strong parameters, I explicitly set category_ids to be an array
params.require(:question).permit(:question_detail...
Understanding events and event handlers in C#
...in the context of creating user interfaces. I think this is the prototype for creating an event:
12 Answers
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git ignore exception
I have a gitignore file that makes git ignore *.dll files, and that is actually the behavior I want. However, if I want an exception ( i.e. to be able to commit foo.dll ), how can I achieve this?
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Large, persistent DataFrame in pandas
I am exploring switching to python and pandas as a long-time SAS user.
6 Answers
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How to merge remote master to local branch
I have a local branch of a project ("configUpdate") that I've forked from somebody else's project and I've done a load of changes on it and would like to merge the changes they've made in to my local branch.
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Type safety: Unchecked cast
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Well, first of all, you're wasting memory with the new HashMap creation call. Your second line completely disregards the reference to this created hashmap, making it then available to the garbage collector. So, don't do that, use:
private Map<String, String&g...
How do you specify command line arguments in Xcode 4?
...since it just went gold master. I need to specify a command line argument for testing my application.
2 Answers
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Any way to declare a size/partial border to a box?
Any way to declare a size/partial border to a box in CSS? For example a box with 350px that only shows a border-bottom in its firsts 60px . I think that might be very useful.
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Npm install failed with “cannot run in wd”
...stall .
So when I try npm install , it says that I need to run it as root or adminisrator:
5 Answers
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How do I remove blank elements from an array?
...It will either return cities as its return value if it rejected something, or nil if no rejections are made. That can be a gotcha if you're not careful (thanks to ninja08 for pointing this out in the comments).
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