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List of Rails Model Types
... i wish to add for those reading in future that when creating a migration etc car:references comes in very handy for creating a car_id foreign key.
– BKSpurgeon
Jul 25 '16 at 22:46
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void in C# generics?
...void> instead of Action, Func<T, void> instead of Action<T> etc.
It would also make async simpler - there'd be no need for the non-generic Task type at all - we'd just have Task<void>.
Unfortunately, that's not the way the C# or .NET type systems work...
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What are the complexity guarantees of the standard containers?
...e
Note : This does not consider all the containers such as, unordered_map etc. but is still great to look at. It is just a cleaner version of this
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“java.lang.OutOfMemoryError : unable to create new native Thread”
...k if there is a maxTasks limit. If there is, you can remove it by editing /etc/systemd/system.conf, adding a config: DefaultTasksMax=infinity
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Node.js create folder or use existing
...an achieve this very gracefully without encountering a race condition.
In order to prevent dead time between checking for existence and creating the directory, we simply try to create it straight up, and disregard the error if it is EEXIST (directory already exists).
If the error is not EEXIST, ho...
Why do objects of the same class have access to each other's private data?
...a class that you (the coder of the class) might change in future versions, etc., and you don't want other coders using your class to rely on their existence or functionality.
If you want true access control, you should implement genuine data security techniques.
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UIView with rounded corners and drop shadow?
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The following code snippet adds a border, border radius, and drop shadow to v, a UIView:
// border radius
[v.layer setCornerRadius:30.0f];
// border
[v.layer setBorderColor:[UIColor lightGrayColor].CGColor];
[v.layer setBorderWidth:1.5f];
// drop shadow
[v....
What is the difference between HTTP status code 200 (cache) vs status code 304?
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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angularjs directive call function specified in attribute and pass an argument to it
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Here's what worked for me.
Html using the directive
<tr orderitemdirective remove="vm.removeOrderItem(orderItem)" order-item="orderitem"></tr>
Html of the directive: orderitem.directive.html
<md-button type="submit" ng-click="remove({orderItem:orderItem})">
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Xcode changes unmodified storyboard and XIB files
...LDataWithOptions: to fill the file again. Because sets do not preserve the order of their elements, even the slightest modification could change the whole storyboard XML file.
Why does the class tag disappear or reappear randomly?
The <class> section is nothing more than an internal Xcode cach...