Operation of JSON objects, JSON tool

JSON is often used in projects, and now writes a few JS functions to get the length of a JSON object or JSON string, and to get its key value, value, and return.

This can be directly used in the future, you can save a lot of trouble, but also easy to view later.

1 /**2 * Verify that the incoming object is a JSON object or a JSON string, and that the JSON object is returned if the condition is met, otherwise false3 * not be able to pass the string "Weiyl", "ABCD" non-JSON string, otherwise it will error. 4 * @param json5 * @returns6  */7 functionToJson (JSON) {8     varType =typeofJSON;9     /**Ten * prevents incoming strings from being null,undefined or ' empty strings, so when judging One * Use type== "string" with the upper JSON itself A      */ -     if(Type = = "string" &&JSON) { -         returnJson.parse (JSON); the}Else if(Type = = "Object") { -         returnJSON; -}Else { -Alert (' You passed in arguments ' + json + ', not a JSON object or a JSON-formatted string '); +         return false; -     } + } A /** at * Using the typeof operator to use the typeof operator on a value may return one of the following strings: -  *  - * 1): undefined--If this value is undefined -  *  - * 2): boolean--If this value is a Boolean value -  *  in * 3): string--If this value is a string -  *  to * 4): number--If this value is numeric +  *  - * 5): object--If this value is an object or null the  *  * * 6): function--If this value is a function passed in a JSON object, or the JSON format $ * String that returns the length of this JSON object, otherwise, returns-1Panax Notoginseng  *  - * @param jsonobj the * @returns {number} +  */ A functionGetjsonlen (jsonobj) { theJsonobj =ToJson (jsonobj); +     varType =typeofjsonobj; -     if(Type = = "Boolean" | | type = = Undefined | | type = = "Number" $|| Type = = "function") { $         return-1; -     } -     varLen = 0; the      for(varIteminchjsonobj) { -len++;Wuyi     } the     returnLen; - } Wu  - /** About */** Pass in a JSON string or JSON object, get all key values, and $ * returned as an array, returns 1 if it is not a JSON string or JSON object passed in. -  *  - * @param jsonobj - * @returns {Array} A  */ + functionGetjsonkey (jsonobj) { the     varLen =Getjsonlen (jsonobj); -     if(len = =-1) { $         return-1; the     } the     varArray = []; the     /* the * Because the incoming object is judged in the Getjsonlen () method, here - * You don't have to judge whether it's JSON or a JSON string. in      */ the      for(varIteminchjsonobj) { the Array.push (item); About     } the     returnArray; the } the /** + * Pass in a JSON string or JSON object, get all value values, and - * returned as an array, if it is not a JSON string or JSON object, return 1 the  * Bayi * @param jsonobj the * @returns {Array} the  */ - functionGetjsonvalue (jsonobj) { -     varLen =Getjsonlen (jsonobj); the     if(len = =-1) { the         return-1; the     } the     varArray = []; -     /* the * Because the incoming object is judged in the Getjsonlen () method, the * There's no need to judge whether it's a JSON or a JSON string. the      */94      for(varIteminchjsonobj) { the Array.push (Jsonobj[item]); the     } the     returnArray;98}

The above methods can be used to do some common operations on JSON objects or JSON strings, this is the download link :myjsonutil.js,

Operation of JSON objects, JSON tool