Comments (4)
type ConsistsOnlyOf<LongString extends string, Substring extends string> = LongString extends ''
? true
: LongString extends `${Substring}${infer B}`
? ConsistsOnlyOf<B, Substring>
: false;
思路: 字符串匹配,利用 extends 、利用ts下支持的模板字符串语法,利用 infer 从开头一步步的去匹配,减治的**。
随着递归的深入字符串愈来愈短,直至为空,注意空的话算匹配成功。
from awesome-typescript.
type ConsistsOnlyOf<
LongString extends string,
Substring extends string
> = LongString extends `${Substring}${infer R}`
? ConsistsOnlyOf<R, Substring>
: LongString extends ""
? true
: false;
from awesome-typescript.
type ConsistsOnlyOf<LongString extends string, Substring extends string> =
LongString extends ''
? true
: LongString extends `${Substring}${infer S}`
? ConsistsOnlyOf<S, Substring>
: false
from awesome-typescript.
type ConsistsOnlyOf<LongString extends string, Substring extends string>
= LongString extends `${Substring}${infer Others}`
? ConsistsOnlyOf<Others, Substring>
: LongString extends '' ? true : false
from awesome-typescript.
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