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export default function isNumber(s: string): boolean {    s = s.trim();    return /^(\+|\-)?(\d+(\.\d*)?|\.\d+)((e|E)(\+|\-)?\d+)?$/.test(s);}// export default function isNumber(s: string): boolean {//     s = s.trim();//     if (s.length === 0) return false;//     if (["+Infinity", "Infinity", "-Infinity"].includes(s)) return false;//     const num = Number(s);//     return !Number.isNaN(num);// }