纯数字 使用PureScripts内置Number类型的实用程序功能。 安装 spago install numbers 例子 解析: > fromString " 12.34 " ( Just 12.34 ) > fromString " 1e-3 " ( Just 0.001 ) 格式( Data.Number.Format ): > let x = 1234.56789 > toStringWith (precision 6 ) x " 1234.57 " > toStringWith (fixed 3 ) x " 1234.568 " > toStringWith (expon