Please tell me how to parse this string which is coming from a webservice as a map.
when i using alert in my javascript i am getting the response as
{1=xxx,2=eee,3=ddd,4=rrr,D=3,R=ttt}
I want to get the values before the D key..
as {"1":"xxx","2":"eee","3":"ddd","4":"rrr"}
enter code here
and also an alert for D value as 3
and also an alert for R value as ttt
Thanks in advance
What you've got there is almost valid JSON (JavaScript Object Notation), but not quite.
JSON requires that the property names be double-quoted, for example. To JSON-stringify a TreeMap, you could try starting here: How to serialize a Map of a Map with GSON?
Or you could roll your own JSON stringification, if you can't get GSON working: Double quote the property names, double quote string values, make sure special characters in string values are properly escaped (backslash becomes \\, newline \n, double quote becomes \", etc.). I'd try GSON first.
That's all in the webservice. Now, on the client, you'll have to turn this string into a JavaScript object.
Probably the simplest way is to explicitly parse it on the client with JSON.parse(). For that, the answer is here: How to Parse JSON in JavaScript.
Some will advise you to set the webservice's ContentType to application/json and let the thingy parse it. Fair enough, but this'll work fine.
You are doing double work. Not sure why you would want this rather than to format it as json on the server, and just ajax this to the client formatted as json. But anyway, just to answer your question DEMO:
// your stirng '{1=xxx,2=eee,3=ddd,4=rrr,D=3,R=ttt}';
var MyObjects = [];
//And here is how you use it:
MyObjects = ArrayOfObjects.get('{1=xxx,2=eee,3=ddd,4=rrr,D=3,R=ttt}', 'D=3');
//{"1":"xxx","2":"eee","3":"ddd","4":"rrr"}
console.log(MyObjects[0]);
//Your alerts you needed
console.log(MyObjects[1].D, MyObjects[1].R);
//Function you need
var ArrayOfObjects = (function(){
var splitOn = function(str, char){
var arr = [], pos = str.indexOf(char);
arr.push(str.slice(1, (pos-1)));
arr.push(str.slice(pos, (str.length - 1)));
return arr;
},
getObj = function (str){
var strNew = str.replace(new RegExp('=', 'g'), ':');
var jsonSTR = strNew.replace(/(\w+)|(\d+)/g, '"$1"');
return JSON.parse("{"+jsonSTR+"}");
};
return {
get: function(string, spl){
var strings=splitOn(string, spl), retArr = [];
strings.forEach(function(str){
retArr.push(getObj(str));
});
return( retArr );
}
};
})();
Again This is just an answer to your question, not the solution. The solution would be to form a correct JSON on server side.
You can do something like this:
(function(r,x,s,a,k){
r = {};
s = "{1=xxx,2=eee,3=ddd,4=rrr,D=3,R=ttt}";
a = s.replace(/[{|}]/g, "").split(",");
for(k = 0; k < a.length; k++){
x = a[k].split("=");
if(x[0] == "D" || x[0] == "R") alert(x[1]);
else r[x[0]] = x[1];
}
})();
res are an object:
{
1 : xxx,
2 : eee,
3 : ddd,
4 : rrr
}
Maybe you can do the same with regexp.
