add(server.tests.test2): 添加实验2的内容，将pdf里面标重要的进行提取出来

Server/tests/test2/important/splice.js

@@ -0,0 +1,28 @@
+// splice(start)
+// splice(start, deleteCount)
+// splice(start, deleteCount, item1, ...)
+
+const datas = ["aa", "bb", "cc"];
+console.log(datas.splice(1))
+console.log(datas)
+
+console.log(datas.splice(1, 1))
+console.log(datas)
+
+console.log(datas.splice(1, 0, "xx", "yy"))
+console.log(datas)
+
+console.log(datas.splice(1, 1, "xx"))
+console.log(datas)
+
+/*
+# node splice.js 
+[ 'bb', 'cc' ]
+[ 'aa' ]
+[]
+[ 'aa' ]
+[]
+[ 'aa', 'xx', 'yy' ]
+[ 'xx' ]
+[ 'aa', 'xx', 'yy' ]
+*/