Issue
I am pretty new to TypeScript. I started with a book called Typescript Revealed (Pub Feb.2013). In Chapter 2 there is a section called "Casts" that has the following example:
var a : int = <int>SomeNumberAsAString;
I tried to apply the example, as follows:
var SomeNumberAsAString = "1000";
var a: int = <int>SomeNumberAsAString;
But compiler gave me an error:
hello.ts(2,8): error TS2304: Cannot find name 'int'.
hello.ts(2,15): error TS2304: Cannot find name 'int'.
I'm wondering how to do this cast, or has the specification of Typescript changed?
Solution
(Pub Feb.2013)
That book is old. Its called number
now.
var SomeNumberAsAString = "1000";
var a: number = <number><any>SomeNumberAsAString;
Also this assertion is very unsafe and I would not do this in production code. But it gets the point across :)
More
A more up to date book chapter on assertions : https://basarat.gitbooks.io/typescript/content/docs/types/type-assertion.html
https://basarat.gitbook.io/typescript/type-system/type-assertion
Answered By - basarat
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