JavaScript Programming assignment

import LIMITS from './limits.mjs'; function cellRefToCellId(cellRef) { return cellRef.replace(/\$/g, ''); } function colSpecToIndex(colSpec) { console.assert(0 < colSpec.length && colSpec.length <= 1, 'col coord can have only a single letter'); const a = 'a'.codePointAt(); return colSpec[0].codePointAt() - a; } function indexToColSpec(index, baseIndex=0) { console.assert(0 < LIMITS.MAX_N_COLS, `bad col index ${index}; must be under ${LIMITS.MAX_N_COLS}`); const a = 'a'.codePointAt(); return String.fromCodePoint(a + baseIndex + index); } function rowSpecToIndex(rowSpec) { const index = Number(rowSpec) - 1; if (index >= LIMITS.MAX_N_ROWS) { const msg = `bad row spec ${rowSpec}; cannot be above ${LIMITS.MAX_N_COLS}`; throw new AppError('LIMITS', msg); } return index; } function indexToRowSpec(index, baseIndex=0) { console.assert(index < LIMITS.MAX_N_ROWS, `bad row index ${index}; must be under ${LIMITS.MAX_N_ROWS}`); return String(baseIndex + index + 1); } export { cellRefToCellId, colSpecToIndex, indexToColSpec, rowSpecToIndex, indexToRowSpec, };