Rule proposal: require-reduce-initial-value

[zanminkian]

Description

If an array is empty, calling reduce/reduceRight method will cause runtime error. We need a rule to force passing initial value to reduce/reduceRight method

const nums: number[] = [];
const sum = nums.reduce((result, num) => result + num); // This will cause runtime error

Fail

[].reduce((a, b)=>a+b);
[].reduceRight((a, b)=>a+b);
someArray.reduce((a, b)=>a+b);
someArray.reduceRight((a, b)=>a+b);

Pass

[].reduce((a, b)=>a+b,0);
[].reduceRight((a, b)=>a+b,foo);
someArray.reduce((a, b)=>a+b, 0);
someArray.reduceRight((a, b)=>a+b, foo);
Array.prototype.reduce.call(nums, (x,y)=>x+y);
Array.prototype.reduce.appy(nums, [(x,y)=>x+y]);

Proposed rule name

require-reduce-initial-value

Additional Info

No response

[sindresorhus]

This could be part of #1356