在TypeScript中使用forEach返回boolean

Question

I want check my Array, if I get 3 , I want break my forEach and return true o false if it isn't true.

but I get undefined when I push 3 in my html-

 let errorSave: boolean = this.checkParams();

 console.log("errorSave" , errorSave); // UNDEFINED

 checkParams() {
        let errorSave = this.params.forEach(element => {
            if (element.origin === 3) {
               return true;
            }
        });
        return errorSave;
    }

Answer 1

Did you try using find ?

checkParams() {
    return !!this.params.find(element => element.origin === 3);
}

Answer 2

Use indexOf instead of foreach clause.

array=[1,2,3];

return this.array.indexOf(3)>-1;