Here is the code snippet I am referring to:
public static postData(language: string, money: number): Promise<testModel.Item[]> {
return ........
});
}
I would like to understand what this code does and the significance of Promise< testModel.Item[] > in this context.
In this code snippet, the return type of the function is declared as Promise<testModel.item[]>. Essentially, it indicates that the function postData will return a promise that resolves with an array of testModel.item.
The usage of <> in this context is to provide parameters for a generic type. For more information on generics in typescript, you can refer to the documentation here.
It's known as Generics
When working with TypeScript, there are times when you may need a function or class that can handle different types in a flexible way.
For instance:
class Stack<TItem> {
push(item: TItem) {/...}
pop() -> TItem {... }
}
You can then use Stack<string>, Stack<number>, and so on...In your code, Generics can also be useful when dealing with a Promise<TResult>, where TResult represents the expected type of the promise result.
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