javascript中的lambda表达式
<!DOCTYPE html> <html> <head> </head> <body> <script> var nubList = [ { expressId: "00001", //快递单号ID expressNum: "数据1" }, { expressId: "00002", //快递单号ID expressNum: "数据2" }, { expressId: "00003", //快递单号ID expressNum: "数据3" }, { expressId: "00004", //快递单号ID expressNum: "数据4" } ]; var nub = nubList.find(nub => nub.expressId == "00002"); console.log(nub.expressId); var nub1 = nubList.filter(nub => nub.expressId == "00002"); console.log(nub1[0].expressId); </script> </body> </html>
数据来自网上。
find和filter这两个的区别是:
find返回的是一条数据;
filter返回的是一个数组;