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 9 10 11 12 13 14 15 16 17 18 19 20 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x | const checkForError = require('./src/checkForError'); /** * Get first index of array, with number key * @param {Array} array - input array * @param {Boolean} fatalError - should error be thrown in case no keys are found? * @returns {Number} first index if input is indeed array */ const getFirstKeyFromArray = (array, fatalError) => { if (Array.isArray(array)) { if (array[0] !== undefined) { return 0; } } checkForError(fatalError); return undefined; }; module.exports = getFirstKeyFromArray; |