What could be causing this error?
I have attempted different approaches, but the error persists without resolution
Here is my code:
function $sum(xor:string[]):string
function $sum(xor:number[]):number
{
let xor_;
if(xor instanceof String){
for(let i of xor){
xor_+=i;
}
}else{
for(let i of xor){
xor_+=i;
}
}
return xor_;
}
This is the error message I am encountering:
According to the error message, a valid implementation signature is required: Reference from the typescript documentation
For a practical example, visit this Stackblitz illustration:
function $sum(xor:string[]):string;
function $sum(xor:number[]):number;
function $sum(xor:Array<string | number>):number | string
{
/**
* as outlined in your overloads, the function should return
* - a string when receiving a string array input
* - a number when receiving a number array input
*
* To determine whether the input is a string array or a number array,
* you may check the type of the first item in the array
* e.g. typeof xor[0] === 'string'
*
* As mentioned by T.J.Crowder in a comment,
* handling an empty array poses a challenge: hence
* ensure that your function does not accept empty arrays and potentially throws an error
*/
}
The initial two lines represent the overloads while the third line represents the implementation signature.
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