jade mixin錯(cuò)誤
mixin study(name, courses)
?? ??? ??? ?p #{name} study
?? ??? ??? ?ul.courses
?? ??? ??? ??? ?each course in courses
?? ??? ??? ??? ??? ?li= course
?+study("jade",["jade","node"])
這段為什么會(huì)報(bào)Cannot read property 'length' of undefined的錯(cuò)誤
