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// This is an input class. Do not edit. class Node { constructor(value) { this.value = value; this.prev = null; this.next = null; } } // Feel free to 阅读全文
posted @ 2022-08-04 01:17
Zhentiw
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The definite assignment !: operator is used to suppress TypeScript’s objections about a class field being used, when it can’t be proven1 that it was i 阅读全文
posted @ 2022-08-03 20:11
Zhentiw
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Requirements: function strBuilder(str) { return strBuilder; // TODO } var hello = strBuilder("Hello, "); var kyle = hello("Kyle"); var susan = hello(" 阅读全文
posted @ 2022-08-03 19:56
Zhentiw
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value is Foo The first kind of user-defined type guard we will review is an is type guard. It is perfectly suited for our example above because it’s m 阅读全文
posted @ 2022-08-03 13:23
Zhentiw
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class UnreachableError extends Error { constructor(_nvr: never, message: string) { super(message) } } class Car { drive() { console.log("vroom") } } c 阅读全文
posted @ 2022-08-03 01:59
Zhentiw
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For the following class: class Car { make: string model: string year: number constructor(make: string, model: string, year: number) { this.make = make 阅读全文
posted @ 2022-08-01 17:17
Zhentiw
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function f(...args) { return args; } function flip(fn) { return function flipped (arg1, arg2, ...args) { return fn(arg2, arg1, ...args) } } let z = fl 阅读全文
posted @ 2022-07-31 16:45
Zhentiw
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Construct signatures are similar to call signatures, except they describe what should happen with the new keyword. interface DateConstructor { new (va 阅读全文
posted @ 2022-07-28 15:46
Zhentiw
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Recursive types, are self-referential, and are often used to describe infinitely nestable types. For example, consider infinitely nestable arrays of n 阅读全文
posted @ 2022-07-27 19:15
Zhentiw
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An interface is a way of defining an object type. An “object type” can be thought of as, “an instance of a class could conceivably look like this”. Fo 阅读全文
posted @ 2022-07-27 19:14
Zhentiw
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