TypeScript：数组中的拼接值抛出错误

Question

I want to remove a Value from an array.

My Code is runnign fine, but Visual Studio Code indicates that there is a Problem:

My Code:

 removeFromFav(){ var favoritesArray: Array<any> = this.getFavorites() for(let key in favoritesArray){ if(favoritesArray[key].hidx === this.hidx && favoritesArray[key].kontenrahmen === this.kontenrahmen ) { favoritesArray.splice(key, 1); } } localStorage.setItem( this.storageName, JSON.stringify(favoritesArray) ); }

Error Message:

No overload matches this call. Overload 1 of 2, '(start: number, deleteCount?: number | undefined): any[]', gave the following error. Das Argument vom Typ "string" kann dem Parameter vom Typ "number" nicht zugewiesen werden. Overload 2 of 2, '(start: number, deleteCount: number, ...items: any[]): any[]', gave the following error. Das Argument vom Typ "string" kann dem Parameter vom Typ "number" nicht zugewiesen werden.

The Problems seems to be the "key" in line 5 But how can I solve that?

Thanks in advance:)

Answer 1

You are getting error because the syntax is not correct. The following is syntax:

let arrDeletedItems = array.splice(start[, deleteCount[, item1[, item2[, ...]]]])

You can mention the start index, delete count: number of items to deleted and item1..itemN: To be added in the array.

You should specify the something like below:

favoritesArray.splice(parseInt(itemIndex), 1);

Since for..in returns key in string type and not number, you should parse to number and then use.

For more details, please refer documentation here arraysplice