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Merge two types into a new type. Keys of the second type overrides keys of the first type. For example type foo = { name: string; age: string; } type 阅读全文
posted @ 2022-09-25 03:12
Zhentiw
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Implement the String to Union type. Type take string argument. The output should be a union of input letters For example type Test = '123'; type Resul 阅读全文
posted @ 2022-09-16 16:25
Zhentiw
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Implement the Absolute type. A type that take string, number or bigint. The output should be a positive number string For example type Test = -100; ty 阅读全文
posted @ 2022-09-16 16:18
Zhentiw
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Subject as resource can be shared amount multi observers. Normal Observable pattern is Cold observable, each subscription will get its own resource: i 阅读全文
posted @ 2022-09-15 21:06
Zhentiw
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In this challenge, you would need to write a type that takes an array and emitted the flatten array type. For example: type flatten = Flatten<[1, 2, [ 阅读全文
posted @ 2022-09-15 14:32
Zhentiw
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Implement permutation type that transforms union types into the array that includes permutations of unions. type perm = Permutation<'A' | 'B' | 'C'>; 阅读全文
posted @ 2022-09-15 01:36
Zhentiw
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Write a function that takes in an array of unique integers and returns an array of all permutations of those integers in no particular order. If the i 阅读全文
posted @ 2022-09-15 01:11
Zhentiw
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Compute the length of a string literal, which behaves like String#length. /* _____________ Your Code Here _____________ */ type LengthOfString<S exten 阅读全文
posted @ 2022-09-14 15:20
Zhentiw
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If the server starts on a different port, such as 3001 or 3002, this is because another process is currently running on port 3000. This is ok, but you 阅读全文
posted @ 2022-09-14 14:09
Zhentiw
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For given function type Fn, and any type A (any in this context means we don't restrict the type, and I don't have in mind any type 😉) create a gener 阅读全文
posted @ 2022-09-13 21:06
Zhentiw
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