I need to store an array in sessionStorage and found this answer helpful: Storing Objects in HTML5 localStorage
Storing the array with sessionStorage.setItem('flavors', JSON.stringify(flavors)) and retrieving the string with JSON.parse(sessionStorage.getItem('flavors')) works the first time. Then, testing this plain-JavaScript PWA with the back- and forward- buttons, I get an error:
SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data
Depending on the elements of the array, the column number can vary.
I can avoid the error by using:
flavors = sessionStorage.getItem('flavors').split(",");
instead of JSON.parse(). Along with the error, I can console log the string which looks okay:
chocolate,vanilla,strawberry
What could be causing the error?
In order to parse JSON, the string must represent a valid JSON, in you case this JSON.parse('["chocolate","vanilla","strawberry"]') will work
Related
I'ved got this string generated from sql query (basically using ARRAY_AGG and some cases to format the output) that looks like this
{id:2,name_of_division:'super department1',attendance_radius:1000}
However, in javascript, I cant get any of the key values and its also causing JSON parse error.
I'ved tried validating this JSON and it looks perfectly fine.
Here are some of the troubleshooting, I have no idea what is causing it
console.log(clean_div_array_var[i].toString());
output ==> {id:2,name_of_division:'super department1',attendance_radius:1000}
console.log("id:" + clean_div_array_var[i].id);
output ==> id:undefined
console.log("name_of_division:" + clean_div_array_var[i].name_of_division);
output ==> name_of_division:undefined
JSON.parse(clean_div_array_var[i]);
output ==>
VM2561:1 Uncaught SyntaxError: Unexpected token i in JSON at position 1
at JSON.parse (<anonymous>)
at get_all_key_of_div_array ((index):817)
at render ((index):2321)
at jquery.dataTables.min.js:18
at Object.b.fnGetData (jquery.dataTables.min.js:12)
at B (jquery.dataTables.min.js:17)
at Ha (jquery.dataTables.min.js:25)
at O (jquery.dataTables.min.js:16)
at jquery.dataTables.min.js:49
at i (jquery.dataTables.min.js:35)
I even try to stringify, then somehow remove quotes (I dont understand why this even appears) and then JSON parse. Same problem.
stringifyvar = JSON.stringify(clean_div_array_var[i])
output ==> "{id:2,name_of_division:'super department1',attendance_radius:1000}"
stringifyvar = stringifyvar.split('\"').join('');
console.log("stringify remove quote:" + stringifyvar);
output ==> stringify remove quote:{id:2,name_of_division:'super department1',attendance_radius:1000}
parsed_json_data = JSON.parse(stringifyvar);
output ==>
VM2503:1 Uncaught SyntaxError: Unexpected token i in JSON at position 1
at JSON.parse (<anonymous>)
at get_all_key_of_div_array ((index):816)
at render ((index):2320)
at jquery.dataTables.min.js:18
at Object.b.fnGetData (jquery.dataTables.min.js:12)
at B (jquery.dataTables.min.js:17)
at Ha (jquery.dataTables.min.js:25)
at O (jquery.dataTables.min.js:16)
at jquery.dataTables.min.js:49
at i (jquery.dataTables.min.js:35)
How can I read any of the keys properly from this json
Your result is not valid JSON. Valid format would be:
{"id":2, "name_of_division":"super department1", "attendance_radius":1000}
The keys have to be quoted, and the quotes around the string super department1 have to be double quotes, not singlequotes.
You need to generate proper JSON if you want to be able to use JSON.parse() to process it.
I tried to convert a string to a javascript object using JSON.parse but it's not working.
I tried everything but did not get anything on the console.log and there is no error message.
JSON.parse(`{'exp': '1', 'input': '1d6404f66ed3d72e', 'iterate': 'no'}`);
Update
In the real code, I'm passing the value from an object
console.log(JSON.parse(future.onIOPub.data['text/plain']))
When you run this, you should see
Uncaught SyntaxError: Unexpected token ' in JSON at position 1
This error is because you are using single quotes. JSON only accepts double quotes, as described in the spec
https://www.json.org/json-en.html
I was invoking the SageMaker endpoint from my angular front-end when I came across this error on AWS CloudWatch regarding my model making inferences from the data (In the form of a comma-separated string with target values at the first index) I was sending : Unable to parse numeric values. The string I'm using to invoke the endpoint was : "1533071820,0.05619,0.05619,0.05611,0.05611,0.006076\n"
String request = "1533071820,0.05619,0.05619,0.05611,0.05611,0.006076\n"
ByteBufferbuf = ByteBuffer.wrap(request.getBytes());
invokeEndpointRequest.setBody(buf);
Use the SageMaker API
AmazonSageMakerRuntime amazonSageMaker = AmazonSageMakerRuntimeClientBuilder.defaultClient();
Invoke the model endpoint on SageMaker
InvokeEndpointResult invokeEndpointResult = amazonSageMaker.invokeEndpoint(invokeEndpointRequest);
The result I was expecting from the endpoint is a JSON object with the 'score' attribute in the format : {"predictions": [{"score": xxxxxxx}]}
I am getting a 'ModelError: Unable to evaluate payload' from the IDE logs and 'Unable to parse numeric values on CloudWatch'
So, upon debugging this issue, I found that because of the newline character at the end, the model was assuming there are 2 strings in my input but there's only one. Hence, the error. So I just changed the string to : "1533071820,0.05619,0.05619,0.05611,0.05611,0.006076". And if I'm parsing more than one payload(batch), it's: "1533071820,0.05619,0.05619,0.05611,0.05611,0.006076\n1533071820,0.05619,0.05619,0.05611,0.05611,0.006076" where my 2 inputs are separated by that newline character and more importantly, there's no newline character at the end
I have a JSON Object which contains the following structure:
{"msg":"text","id":integer}
The user enters the text and the object is generated in the server-side (Java) and then passed as a String to JSON.parse() on the client-side.
The problem is, when a user enters a JSON Object format as the text, the function fails with:
SyntaxError: Unexpected token E in JSON at position 1
The string that resulted this error is:
{"msg":"{ENABLE:0,MOVING:0,ERRMESSAGE:}","id":999}
Any ideas for a workaround? I don't understand why it's failing.
I am trying to parse this JSON:
var json = '{"material":"Gummislang 3\/4\" 30 m (utanp\u00e5liggande sk\u00e5p)"}'
I run JSON.parse(json) but i get the error SyntaxError: Unexpected number when doing so. I have tried this in Google Chrome. I don't know what the problem is since I can take the JSON string and put it in any JSON validator and it claims that the JSON is valid. Shouldn't the browser be able to parse it?
You are inserting a JSON object representation into a JavaScript string without properly escaping the representation.
To avoid having to do this, remove the quotes you are adding around the representation, and skip the JSON.parse(json) – the default output from PHP's json_encode() is valid JavaScript when used in this context.
For security, you should specify the JSON_HEX_TAG option if possible. This will prevent cross-site scripting in cases where the JSON might end up inside a document parsed as XML. (And for XML documents, the JSON should be inside a CDATA section as well.)
You're validating the string literal, which is a valid JSON string containing invalid JSON. You need to validate the value of the string, which is not valid JSON.
If you paste the string value into a JSON validator, you'll see that the error comes from this part:
"material": "Gummislang 3/4"30m
The " needs to be escaped.