From an API, I’m trying to get data using httpModule. Here is my code When I use async and await, it says that await has no effect. An undefined is getting assigned to the variable this.output. How can I make this work? Also, How can I get access to a variable from the below response array? here I need to
Tag: typescript
‘yield’ expression implicitly results in an ‘any’ type because its containing generator lacks a return-type annotation
The first snippet is the code im working with and below is the error it throws and it happens on every “yield select” portion that is in the code and im not sure what my next step is. Answer The literal type of select(getPathname) doesn’t relate to the value you get back from the yield. select(getPathname) is the value yielded
Angular doesn’t update view on array push
I have an issue with a function which loads posts with the ionic infinite scroll component. The function works great on other components but in this one, the view doesn’t update when I push new posts into the array. This is the function that doesn’t work: This is the one that works: Here is the html: I’m new to this
Typescript: get type of interface property based on interface key
I’m building a function that needs to update one field of an object at a time. this object is defined through an interface T. This should be the type signature of this function: This generates the error: ‘key’ refers to a value, but it is being used as a type here. Did you mean ‘typeof key’?. IMO I did not
angular http interceptor not calling request again after token refresh
I have a http interceptor in my project, it handles the refreshing of the access token. When a user’s access token expires the request will get a 401 error, in that case, this function should handle everything, refreshing the token and calling the request again, with the new access token. Here is the calling of the function: And the handle401:
convert js into typescript into angular 8
Below code is working fine in javascript. But when i tried the same in Angular 8 I am getting lot of error Errors signUpButton.addEventListener(‘click’, () => { ~ error TS1003: Identifier expected. please let me know how to convert this into Typescript Answer In Angular, It’s better to not use eventListeners rather use event binding in your HTML code. Your
Is there an algorithm for merging elements of an array of objects with the same key
I have the following data, and I’ve been looking for a reference to an algorithm for building a returned array that is grouped by a field (e.g. discipline) and pushes in all the unique fields. Initial Dataset: Desired Result: Answer There is no particular algorithm for this problem, what you can do is break this problem into subproblem and get
How to get current screen orientation in iOS Safari?
I am trying to get the current screen orientation of iOS however my function which work on chrome dev tool emulator and desktop but it doesn’t work on iOS. Here is my function: and here is how my program rougthly do to detect the screen orientation change and to use the function: I tried using window.screen.height and window.screen.width however it
Infer does not work in generics as second param
does anyone know why in the second case the infer does not display the desired type? playground Answer Cause Extending this answer, the type inference for generics in class is done based on properties of the class based on type inference from methods. The type of the first generic is inferred correctly inferred from the parameter of the method emit
Not return nested objects
I hav a problem with typeorm, I ahve na queryBuilder like below: why this query return me this data: instead of this: i need to return nested object instead of using alias, can someone tell me how to do this with using queryBuilder? thanks for any help! Answer You have to use getOne not getRawOne.