json lens 带JSON指针的镜头

JSON镜头从创建镜头。从这个JSON开始： var market = { foods : { fruits : [ 'apples' , 'oranges' ] , veggies : [ 'peas' , 'carrots' ] } } ;我们可以使用JSON指针创建镜头。 var lens = require ( 'json-lens' ) ; var firstFruit = lens ( '/foods/fruits/0' ) ; var secondVeggie = lens ( '/foods/veggies/1' ) ;并使用它们从我们的JSON对象中获取值t . equal ( firstFruit ( market ) , 'apples' ) ; t . equal ( secondVeggie ( m