How to select json item from the array
From the below JSON, how can I retrieve title from the note and notes using a for loop and ajax开发者_开发技巧 to retrieve?
{
"infos": {
"info": [
{
"startYear": "1900",
"endYear": "1930",
"timeZoneDesc": "daweerrewereopreproewropewredfkfdufssfsfsfsfrerewrBlahhhhh..",
"timeZoneID": "1",
"note": {
"notes": [
{
"id": "1",
"title": "Mmm"
},
{
"id": "2",
"title": "Wmm"
},
{
"id": "3",
"title": "Smm"
}
]
},
"links": [
{ "id": "1", "title": "Red House", "url": "http://infopedia.nl.sg/articles/SIP_611_2004-12-24.html" },
{ "id": "2", "title": "Joo Chiat", "url": "http://www.the-inncrowd.com/joochiat.htm" },
{ "id": "3", "title": "Bake", "url": "https://thelongnwindingroad.wordpress.com/tag/red-house-bakery" }
]
}
I tried out the code below but it doesn't work - it either says:
is null
not an object
length is null
r not an object
var detail = eval(xmlhttprequest.responseText)
var rss = detail.infos.info
for(var i = 0; i<rss.length; i++)
startyear += rss[i].startyear
Use
for (i = 0; i < 3; i++) {
alert(JSON.infos.info[0].note.notes[i].title);
}
TRY IT HERE: JSFIDDLE WORKING EXAMPLE
BTW your JSON is not valid. Use this JSON:
var JSON = {
"infos": {
"info": [
{
"startYear": "1900",
"endYear": "1930",
"timeZoneDesc": "daweerrewereopreproewropewredfkfdufssfsfsfsfrerewrBlahhhhh..",
"timeZoneID": "1",
"note": {
"notes": [
{
"id": "1",
"title": "Mmm"
},
{
"id": "2",
"title": "Wmm"
},
{
"id": "3",
"title": "Smm"
}
]
},
"links": [
{
"id": "1",
"title": "Red House",
"url": "http://infopedia.nl.sg/articles/SIP_611_2004-12-24.html"
},
{
"id": "2",
"title": "Joo Chiat",
"url": "http://www.the-inncrowd.com/joochiat.htm"
},
{
"id": "3",
"title": "Bake",
"url": "https://thelongnwindingroad.wordpress.com/tag/red-house-bakery"
}
]
}
]
}
}
EDIT:
Here is what you want:
var infoLength= JSON.infos.info.length;
for (infoIndex = 0; infoIndex < infoLength; infoIndex++) {
var notesLength= JSON.infos.info[infoIndex].note.notes.length;
for (noteIndex = 0; noteIndex < notesLength; noteIndex++) {
alert(JSON.infos.info[infoIndex].note.notes[noteIndex].title);
}
}
Putting your json into an var called obj
, use the following:
obj.infos.info[0].note.notes[0].title
http://jsfiddle.net/Znq34/
Well the "path" to the JSON notes
array-like object is:
json.infos.info[0].note.notes;
So you could do something like:
var notes = json.infos.info[0].note.notes;
var titles = [];
for (var i = 0, len = notes.length; i < len; i++)
{
titles.push(notes[i].title);
}
alert('titles is: ' + titles.join(', '));
Fiddle: http://jsfiddle.net/garreh/uDxqD/
Are you using jQuery? ;-)
// Assuming your using "success" in ajax response
success: function(json)
{
var titles = $(json.infos.info[0].note.notes).map(function() {
return this.title;
}).get();
alert(titles.join(', '));
}
First count the length of notes
var len = jsonobject.infos.info.note.notes.length;
Then loops through and get
var title = jsonobject.infos.info.note.notes[i].title;
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