wangluyao959

> @jinghh > ```ts > interface SearchFunc { > (source: string, subString: string): boolean; > } > > let mySearch: SearchFunc; > mySearch = function(source: string, subString: string) { >...

> > @huang-guanhua > > 好像最后reverse函数的例子，应该还要加上undefined,不然会ts报错吧 > > 我也觉得奇怪我觉得可以直接简化成这样： > interface SearchFunc { > (source: string, subString: string): boolean; > } > > let mySearch: SearchFunc; > mySearch = function(source,...