Comments (19)
type Push<T extends any[], V> = [...T, V];
// 测试用例
type Arr0 = Push<[], 1> // [1]
type Arr1 = Push<[1, 2, 3], 4> // [1, 2, 3, 4]
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//使用11题的isEqual type Includes<T extends Array<any>, E> = T extends [infer A, ...infer B] ? IsEqual<A, E> extends true ? true : Includes<B, E> : false; type I0 = Includes<[], 1>; // false type I1 = Includes<[2, 2, 3, 1], 2>; // true type I2 = Includes<[2, 3, 3, 1], 1>; // true
你的答案串题了 @sunboyZgz
from awesome-typescript.
type Push<T extends any[], V> = T extends [...infer U] ? [...U, V] : never;
// 测试用例
type Arr0 = Push<[], 1> // [1]
type Arr1 = Push<[1, 2, 3], 4> // [1, 2, 3, 4
from awesome-typescript.
type Push<T extends any[], V> = T extends [...infer Args] ? [ ...Args, V] : never// 你的实现代码
// 测试用例
type Arr0 = Push<[], 1> // [1]
type Arr1 = Push<[1, 2, 3], 4> // [1, 2, 3, 4]
from awesome-typescript.
type Push<T extends any[], V> = [...T, V] // 你的实现代码
// 测试用例
type Arr0 = Push<[], 1> // [1]
type Arr1 = Push<[1, 2, 3], 4> // [1, 2, 3, 4]
from awesome-typescript.
type Push<T extends any[], V> = [...T, V]
type ArrP0 = Push<[], 1> // [1]
type ArrP1 = Push<[1, 2, 3], 4> // [1, 2, 3, 4]
from awesome-typescript.
type Push<T extends any[], V> = [...T, V]
// 测试用例
type Arr0 = Push<[], 1> // [1]
type Arr1 = Push<[1, 2, 3], 4> // [1, 2, 3, 4]
from awesome-typescript.
ype Push<T extends any[], V> = // 你的实现代码 // 测试用例 type Arr0 = Push<[], 1> // [1] type Arr1 = Push<[1, 2, 3], 4> // [1, 2, 3, 4]
type Push<T extends any[], V> = [...T, V]
from awesome-typescript.
// 实现一个 Push 工具类型,用于把指定类型 E 作为第最后一个元素添加到 T 数组类型中。具体的使用示例如下所示:
type Push<T extends any[], V> = [...T, V];
// 测试用例
type Arr0 = Push<[], 1> // [1]
type Arr1 = Push<[1, 2, 3], 4> // [1, 2, 3, 4]
着眼点在数组的形状上,直接构造。省去乱七八糟的东西
from awesome-typescript.
type Push<T extends any[], V> = [...T, V]
// 测试用例
type Arr0 = Push<[], 1> // [1]
type Arr1 = Push<[1, 2, 3], 4> // [1, 2, 3, 4]
from awesome-typescript.
export default {}
// 实现一个 Push 工具类型,用于把指定类型 E 作为第最后一个元素添加到 T 数组类型中。具体的使用示例如下所示:
type Push<T extends any[], V> = [V, ...T]
// 测试用例
type Arr0 = Push<[], 1> // [1]
type Arr1 = Push<[1, 2, 3], 4> // [1, 2, 3, 4]
from awesome-typescript.
type Push<T extends any[], V> = [...T, V];
// 测试用例
type Arr0 = Push<[], 1> // [1]
type Arr1 = Push<[1, 2, 3], 4> // [1, 2, 3, 4]
from awesome-typescript.
type Push<T extends any[], V> = [...T, V]
from awesome-typescript.
type Push<T extends any[], V> = T extends [...infer R] ? [...R, V] : T
// 测试用例
type Arr0 = Push<[], 1> // [1]
type Arr1 = Push<[1, 2, 3], 4> // [1, 2, 3, 4]
from awesome-typescript.
type Push<T extends any[], V> =
T extends [...infer Arr]
? [...Arr, V]
: []
// 测试用例
type Arr0 = Push<[], 1> // [1]
type Arr1 = Push<[1, 2, 3], 4> // [1, 2, 3, 4]
from awesome-typescript.
// 解法1: 直接扩展运算符
type Push<T extends any[], V> = [...T, V]
// 解法2: 使用infer指代源数组来扩展
type Push1<T extends any[], V> = T extends [...infer K] ? [...K, V] : []
from awesome-typescript.
type Push<T extends any[], V> = [...T, V] // 你的实现代码
// 测试用例
type Arr0 = Push<[], 1> // [1]
type Arr1 = Push<[1, 2, 3], 4> // [1, 2, 3, 4]
from awesome-typescript.
type Push<T extends any[], V> = [...T, V]; // 你的实现代码
// 测试用例
type Arr0 = Push<[], 1>; // [1]
type Arr1 = Push<[1, 2, 3], 4>; // [1, 2, 3, 4]
from awesome-typescript.
type Push<T extends any[], V> = [...T, V];
// 测试用例
type TestArr0 = Push<[], 1>; // [1]
type TestArr1 = Push<[1, 2, 3], 4>; // [1, 2, 3, 4]
from awesome-typescript.
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