operator head.ts

100% Statements 6/6

100% Branches 2/2

100% Functions 1/1

100% Lines 5/5

Press n or j to go to the next uncovered block, b, p or k for the previous block.


1
2
3
4
5
6
7
8 1x
7x
3x
1x
 
2x
 
  export const head = <T>(array: T[]): T => {
  const [aHead] = array;
  if (!array.length) {
    throw Error();
  }
  return aHead;
};