update

jQuery/jQueryFreq.js

@@ -19,6 +19,9 @@ var dataArr = ["a", "b", "c"]
 dataArr.unshift("d");   // 插入js数组最前面
 dataArr.push("d");      // 插入js数组最后面
 
+// unshift/push - add an element to the beginning/end of an array
+// shift/pop - remove and return the first/last element of and array
+
 dataArr.map(function(item, index)   // js array的map，返回array
 // jQuery的遍历每个array的item
 $('.pluginFormDiv').each(function(index, eachItem) {