Develop Reference

How to loop through the response text of JSON file?

I have a JSON file that contains object like that:
{
"status": "ok",
"feed": {
},
"items": [
{
"title": "",
"author": ""
},
{
"title": "",
"author": ""
},
{
"title": "",
"author": ""
}
]
}
I want to loop through the items and get each item data like title and author.
The code I tried:
var json = $.getJSON({'url':"filejson" , 'async': false});
json = JSON.parse(json.responseText);
$.each(json, function(index , item) {
console.log(json[index]);
});

It would appear the sync version of it acts in a weird way,
var json = JSON.parse($.getJSON({'url':"filejson" , 'async': false}).responseText);
let items = json.items;
items.forEach(item=>{
console.log(item.title, item.author);
})
As a sidenote, you should really not be using async: false.

Object.keys(json).forEach(function(key) {
console.log(json[key])
})
// or if supported/polyfilled
Object.values(json).forEach(function(value) {
console.log(value)
})

Use map():
data.map(d => ({title: d.title, author: d.author}));

Please use the following code
var json = $.getJSON({'url':"filejson" , 'async': false});
json = JSON.parse(json.responseText);
$.each(json.items, function(key , value) {
console.log(value['title'] + " : "+ value['author']);
});

Deleting a key in JSON while making ajax call from javascript

I am new to java script and ajax. I have a JSON and I want to remove outputs cell in this JSON:
{
"cells": [{
"metadata": {
"trusted": true,
"collapsed": false
},
"cell_type": "code",
"source": "print(\"hi\")",
"execution_count": 1,
"outputs": [{
"output_type": "stream",
"text": "hi\n",
"name": "stdout"
}]
},
{
"metadata": {
"trusted": true,
"collapsed": true
},
"cell_type": "code",
"source": "",
"execution_count": null,
"outputs": []
}
],
"metadata": {
"kernelspec": {
"name": "Python [Root]",
"display_name": "Python [Root]",
"language": "python"
},
"anaconda-cloud": {},
"language_info": {
"pygments_lexer": "ipython3",
"version": "3.5.0",
"codemirror_mode": {
"version": 3,
"name": "ipython"
},
"mimetype": "text/x-python",
"file_extension": ".py",
"name": "python",
"nbconvert_exporter": "python"
},
"gist": {
"id": "",
"data": {
"description": "Untitled5.ipynb",
"public": true
}
}
},
"nbformat": 4,
"nbformat_minor": 0
}
and this is my attempt on removing the outputs cell. This piece of code posts the data to above mentioned JSON:
"use strict";
function _objectWithoutProperties(obj, keys) {
var target = {};
for (var i in obj) {
if (keys.indexOf(i) >= 0) continue;
if (!Object.prototype.hasOwnProperty.call(obj, i)) continue;
target[i] = obj[i];
}
return target;
}
var outputs = data.cells;
var data_dup = _objectWithoutProperties(data, ["outputs"]);
var id_input = $('#gist_id');
var id = params.gist_it_personal_access_token !== '' ? id_input.val() : '';
var method = id ? 'PATCH' : 'POST';
// Create/edit the Gist
$.ajax({
url: 'https://api.github.com/gists' + (id ? '/' + id : ''),
type: method,
dataType: 'json',
data: JSON.stringify(data_dup),
beforeSend: add_auth_token,
success: gist_success,
error: gist_error,
complete: complete_callback
});
};
But this code doesnt work. Can some one please guide how can we directly strip a key(outputs in this case) from ajax call and post it to JSON.
This is a gist extension of jupyter notebook and I am trying to strip output while posting it to gist on github

function _objectWithoutProperties(obj, key="outputs") { obj.cells.forEach(cell=>delete(cell[key])); }

If you use ES6, you can use this syntax to remove outputs:
{
...data,
cells: data.cells.map(({ outputs, ...otherProps }) => otherProps),
}
Note: data is your complete object.

Convert JSON object to JSON array with additional elements

I have the following JSON object
{
"https://www.google.com": "200",
"https://www.facebook.com": "200",
"https://www.yahoo.com": "401",
"https://www.friendster.com": "404"
}
Is it possible to convert it to a JSON array with additional elements (url & status) in Javascript?
[
{
"url": "https://www.google.com",
"status": "200"
},
{
"url": "https://www.facebook.com",
"status": "200"
},
{
"url": "https://www.yahoo.com",
"status": "401"
},
{
"url": "https://www.friendster.com",
"status": "404"
}
]
Thank you for the tips.

Parse the string using JSON.parse, get all keys as an array and construct an array of objects with url and status properties
var json = '{\
"https://www.google.com": "200",\
"https://www.facebook.com": "200",\
"https://www.yahoo.com": "401",\
"https://www.friendster.com": "404"\
}';
var obj = JSON.parse(json);
var objWithUrlAndStatus = Object.keys(obj).map(function (key) {
return {
url: key,
status: obj[key]
}
});
console.log(objWithUrlAndStatus);

You can use jquery $.each
like this
var data = {
"https://www.google.com": "200",
"https://www.facebook.com": "200",
"https://www.yahoo.com": "401",
"https://www.friendster.com": "404"
};
var finalData=[];
$.each(data,function(index,val){
finalData.push({url:index,status:val});
});
console.log(finalData);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

C# ListItemCollection to JSON, while keeping values and text items

I have created a web service (asmx file) that returns a serialized ListItemCollection with the following code.
public string getStates(string Country)
{
ListItemCollection lic = DBInterface.GetStates(Country);
var serialized = JsonConvert.SerializeObject(lic);
return serialized;
}
I call the web service via javascript when a user selects a country from a dropdown list using the following code.
//ajax function that uses web services to get states
function GetStates(val)
{
$.ajax({
type: "POST",
url: "/WebServices/getServerData.asmx/getStates",
data: JSON.stringify({Country: val}),
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (data) {
$("#ddlState").empty();
var parsed = JSON.parse(data.d);
for (var i = 0; i < parsed.length; i++) {
$("#ddlState").append("<option value='" + parsed[i] + "'>" + parsed[i] + "</option>");
}
},
error: function (data) {
alert(data.status + " " + data.statusText);
}
});
}
The issue is that I want to also keep not only the ListItemCollection text, but also it's value. However the "JsonConvert.SerializeObject only returns the text items. Can someone help to return the value and text so that I can populate the dropdown via javascript?
Thanks!

One thing you can use the JavaScriptSerializer() in System.Web.Script.Serialization:
ListItemCollection lic = new ListItemCollection() {
new ListItem("Display Text", "val1"),
new ListItem("Display Text 2", "val2"),
};
var ser = new JavaScriptSerializer();
var serialized = ser.Serialize(lic);
Results in (I took the liberty to format) :
[
{
"Attributes": {
"Keys": [],
"Count": 0,
"CssStyle": {
"Keys": [],
"Count": 0,
"Value": null
}
},
"Enabled": true,
"Selected": false,
"Text": "Display Text",
"Value": "val1"
},
{
"Attributes": {
"Keys": [],
"Count": 0,
"CssStyle": {
"Keys": [],
"Count": 0,
"Value": null
}
},
"Enabled": true,
"Selected": false,
"Text": "Display Text 2",
"Value": "val2"
}
]

$.ajax and JSONP.Uncaught SyntaxError: Unexpected token <

I keep getting an Uncaught SyntaxError: Unexpected token <, and I can not for the life of me , figure out why.
function democracyMap(resp) {
representative.fullName = resp.jurisdictions[5].elected_office[0].name_full;
representative.face = resp.jurisdictions[5].elected_office[0].url_photo;
representative.district = resp.jurisdictions[5].name;
senator1.fullName = resp.jurisdictions[6].elected_office[0].name_full;
senator1.face = resp.jurisdictions[6].elected_office[0].url_photo;
senator2.fullName = resp.jurisdictions[6].elected_office[1].name_full;
senator2.face = resp.jurisdictions[6].elected_office[1].url_photo;
representativeInfo();
senator1Info();
senator2Info();
apiSuccess();
}
function ajaxFail(req, status, err) {
console.log('something went wrong', status, err);
}
function getDemocracyMap(){
$.ajax({
type: "GET",
url: "http://api.democracymap.org/",
data:"location=",
crossDomain: true,
dataType: "jsonp",
success: function(resp) {
democracyMap(resp);
},
error: ajaxFail
});
}
Each representative, as well as sentator 1 and senator are set as global variables as such:
var representative = {
"fullName": "",
"firstName": "",
"lastName": "",
"district": "",
"face": "",
"party": "",
"termStart": "",
"termEnd": "",
"facebookID": "",
"twitter": "",
"youTube": ""
}