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a number between 0 and 1 as a type in typescript


By : GracePrzy
Date : September 17 2020, 01:00 AM
I hope this helps . I don't think it's possible. However, if you only need certain numbers you can do this:
code :
type Opacity = 0|0.1|0.2|0.3|0.4|0.5|0.6|0.7|0.8|0.9|1;

let myVar:Opacity = 0.5;


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Angular 2 typescript d3 type issue: Property 'x' does not exist on type '[number, number]'


By : Hugh Fairbairn
Date : March 29 2020, 07:55 AM
Hope this helps Here is the solution. I need to use generics:

Typescript Error: Argument of type 'number' is not assignable to parameter of type 'Expected<Promise<number>>


By : S. Wilhelm
Date : March 29 2020, 07:55 AM
I wish this help you I have the following function which fails on execution: , Try:
code :
it('should show three items', () => {
    const EXPECTED_NUMBER_OF_ITEMS: number = 3;
    page.listOfTabs.count().then(value => {
        expect(value).toBe(EXPECTED_NUMBER_OF_ITEMS);
    });
});

Typescript: Type 'number | null' is not assignable to type 'number'


By : Arun Kumar
Date : March 29 2020, 07:55 AM
I hope this helps . There's no way for TypeScript to know that getLikeCount() returns the same value every time it's called. There are lots of other ways to write this code in a way that doesn't invoke the function twice, e.g.:
code :
statistics.getLikeCount() || 1
const c = statistics.getLikeCount();
let c2 = c == null ? c : 1;

TypeScript - Type 'number | undefined' is not assignable to type 'number'


By : user2886828
Date : March 29 2020, 07:55 AM
Hope that helps Array.prototype.pop() returns type number or undefined. That's where number undefined comes from.
When you perform pop() on an object, a number is returned when array.length > 0, and undefined is returned if array.length = 0.

Angular, typescript, google charts - Type (Date|number)[][] is not assignable to type Array<Array<string|number>


By : Bobi0204
Date : March 29 2020, 07:55 AM
wish of those help I've not used Google Charts before...
From the error it sounds like all you need to do is convert your dates to strings..
code :
...
calendarChartData = [
    [new Date(2019, 3, 13).toISOString(), 333],
    [new Date(2019, 3, 13).toDateString(), 333], // not sure exactly which format the module requires.
    ...
  ];
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