fUnit的示例输入是"CS_25x2u“实际输出是“未定义的”。function buildUnit(fUnit){// wahts ginna be passed here is the gibirish unit and the output of this functionis the clear unit const regex = /[a-zA-Z]*$/
对于任何Applicative实例,一旦编写了<*>,就会唯一地确定pure。假设你有pure1和pure2,它们都遵守法律。然后pure2 id <*> pure1 y = pure1 ($ y) <*> pure2 id -- specialize f to id
pure1 y = pure1 ($ y) <*> pure2 id -- identity for pure