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C# list.Orderby descending
I would like to receive a list sorted by 'Product.Name' in descending order .
6 Answers
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Create an enum with string values
...n use string literal types to provide a reliable and safe experience for named string values (which is partially what enums are used for).
type Options = "hello" | "world";
var foo: Options;
foo = "hello"; // Okay
foo = "asdf"; // Error!
More : https://www.typescriptlang.org/docs/handbook/advan...
Unloading classes in java?
...so have version problems if we don't load the classes dynamically at run time from the AppServer library.
7 Answers
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Determine what attributes were changed in Rails after_save callback?
...if the model's published attribute was changed from false to true. Since methods such as changed? are only useful before the model is saved, the way I'm currently (and unsuccessfully) trying to do so is as follows:
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Pandas convert dataframe to array of tuples
I have manipulated some data using pandas and now I want to carry out a batch save back to the database. This requires me to convert the dataframe into an array of tuples, with each tuple corresponding to a "row" of the dataframe.
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@property retain, assign, copy, nonatomic in Objective-C
As someone that's new to Objective-C can someone give me an overview of the retain, assign, copy and any others I'm missing, that follow the @property directive? What are they doing and why would I want to use one over another?
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Pad a string with leading zeros so it's 3 characters long in SQL Server 2008
...y the question this answer only works if the length <= 3, if you want something larger you need to change the string constant and the two integer constants to the width needed. eg '0000' and VARCHAR(4)),4
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Create space at the beginning of a UITextField
...ew on the textfield. If you want that to be handle correctly you can use something like (example in objc and I only needed the rightView:
- (CGRect)textRectForBounds:(CGRect)bounds {
CGRect paddedRect = UIEdgeInsetsInsetRect(bounds, self.insets);
if (self.rightViewMode == UITextFieldViewM...
The ViewData item that has the key 'MY KEY' is of type 'System.String' but must be of type 'IEnumera
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I had same problem, and finally I got the answer...
The problem is that in the POST action, after submitting the form, the ModelState is not valid, or it's catching an error in try/catch, so the View is returned. But this time the V...
When should TaskCompletionSource be used?
AFAIK, all it knows is that at some point, its SetResult or SetException method is being called to complete the Task<T> exposed through its Task property.
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