/** * JSON stringify的實現 * @author norkts<norkts@Gmail.com> * @version 1.0 2015-11-24 15:11 實現了基本功能 * @version 1.1 2015-11-24 15:19 norkts 增加了JSON.stringify的兼用代碼實現 * @version 1.2 2015-11-24 15:49 norkts 修改數組indexOf在IE下不兼容的寫法,修改了undefined值的特殊處理 */ (function(NS){ //簡單類型 var simpleTypes = ["number", "boolean", "undefined", "string", "function"]; //JSON.stringify的主函數 function stringify(object){ var type = typeof object; //如果是簡單類型，則直接返回簡單類型的結果 if(indexOf(simpleTypes, type) > -1){ return parseSimpleObject(object); } //數組對象的 if(object instanceof Array){ var len = object.length; var resArr = []; for(var i = 0; i < len; i++){ var itemType = typeof object[i]; if(indexOf(simpleTypes, itemType) > -1){ //undefined特殊處理，數組中變成null if(itemType != "undefined"){ resArr.push(parseSimpleObject(object[i])); }else{ resArr.push("null"); } }else{ //遞歸處理JS數組中的復雜元素 resArr.push(stringify(object[i])); } } return "[" + resArr.join(",") + "]"; } //普通object對象 if(object instanceof Object){ if(object == null){ return "null"; } var resArr = []; for(var name in object){ var itemType = typeof object[name]; if(indexOf(simpleTypes, itemType) > -1){ //undefined特殊處理，object中不編碼 if(itemType != "undefined"){ resArr.push("/"" + name + "/":" + parseSimpleObject(object[name])); } }else{ resArr.push("/"" + name + "/":" + stringify(object[name])); } } return "{" + resArr.join(",") + "}"; } } function parseSimpleObject(object){ var type = typeof object; if(type == "string" || type == "function"){ return "/"" + object.toString().replace("/"", "///"") + "/""; } if(type == "number" || type == "boolean"){ return object.toString(); } if(type == "undefined"){ return "undefined"; } return "/"" + object.toString().replace("/"", "///"") + "/""; } function indexOf(arr, val){ for(var i = 0; i < arr.length; i++){ if(arr[i] === val){ return i; } } return -1; } /** * 將stringify做二次封裝 * @param object 要處理的對象 * */ NS.stringify = function(object, isEncodeZh){ var res = stringify(object); if(isEncodeZh){ var encodeRes = ""; for(var i = 0; i < res.length; i++){ if(res.charCodeAt(i) < 0xff){ encodeRes += res[i]; }else{ encodeRes += "//u" + res.charCodeAt(i).toString(16); } } res = encodeRes; } return res; }; })(window); 新聞熱點
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