I've been looking for a while to sort a JSON object like this
{"results": [
{
"layerId": 5,
"layerName": "Pharmaceutical Entities",
"attributes": {
"OBJECTID": "35",
"FACILITYTYPE": "Pharmacy",
"FACILITYSUBTYPE": "24 Hr Pharmacy",
"COMMERCIALNAME_E": "SADD MAARAB PHARMACY",
},
"geometryType": "esriGeometryPoint",
},
{
"layerId": 5,
"layerName": "Pharmaceutical Entities",
"attributes": {
"OBJECTID": "1",
"FACILITYTYPE": "Pharmacy",
"FACILITYSUBTYPE": "24 Hr Pharmacy",
"COMMERCIALNAME_E": "GAYATHY HOSPITAL PHARMACY",
},
"geometryType": "esriGeometryPoint",
},
{
"layerId": 5,
"layerName": "Pharmaceutical Entities",
"attributes": {
"OBJECTID": "255",
"FACILITYTYPE": "Pharmacy",
"FACILITYSUBTYPE": "24 Hr Pharmacy",
"COMMERCIALNAME_E": "AL DEWAN PHARMACY",
},
"geometryType": "esriGeometryPoint",
}
]}
alphabetically by value of "COMMERCIALNAME_E" to get
{"results": [
{
"layerId": 5,
"layerName": "Pharmaceutical Entities",
"attributes": {
"OBJECTID": "255",
"FACILITYTYPE": "Pharmacy",
"FACILITYSUBTYPE": "24 Hr Pharmacy",
"COMMERCIALNAME_E": "AL DEWAN PHARMACY",
},
"geometryType": "esriGeometryPoint",
},
{
"layerId": 5,
"layerName": "Pharmaceutical Entities",
"attributes": {
"OBJECTID": "1",
"FACILITYTYPE": "Pharmacy",
"FACILITYSUBTYPE": "24 Hr Pharmacy",
"COMMERCIALNAME_E": "GAYATHY HOSPITAL PHARMACY",
},
"geometryType": "esriGeometryPoint",
},
{
"layerId": 5,
"layerName": "Pharmaceutical Entities",
"attributes": {
"OBJECTID": "35",
"FACILITYTYPE": "Pharmacy",
"FACILITYSUBTYPE": "24 Hr Pharmacy",
"COMMERCIALNAME_E": "SADD MAARAB PHARMACY",
},
"geometryType": "esriGeometryPoint",
}
]}
I can't find any code that will do this. Can anyone give me some help?
function sortJsonArrayByProperty(objArray, prop, direction){
if (arguments.length<2) throw new Error("sortJsonArrayByProp requires 2 arguments");
var direct = arguments.length>2 ? arguments[2] : 1; //Default to ascending
if (objArray && objArray.constructor===Array){
var propPath = (prop.constructor===Array) ? prop : prop.split(".");
objArray.sort(function(a,b){
for (var p in propPath){
if (a[propPath[p]] && b[propPath[p]]){
a = a[propPath[p]];
b = b[propPath[p]];
}
}
// convert numeric strings to integers
a = a.match(/^\d+$/) ? +a : a;
b = b.match(/^\d+$/) ? +b : b;
return ( (a < b) ? -1*direct : ((a > b) ? 1*direct : 0) );
});
}
}
sortJsonArrayByProperty(results, 'attributes.OBJECTID');
sortJsonArrayByProperty(results, 'attributes.OBJECTID', -1);
UPDATED: DON'T MUTATE
function sortByProperty(objArray, prop, direction){
if (arguments.length<2) throw new Error("ARRAY, AND OBJECT PROPERTY MINIMUM ARGUMENTS, OPTIONAL DIRECTION");
if (!Array.isArray(objArray)) throw new Error("FIRST ARGUMENT NOT AN ARRAY");
const clone = objArray.slice(0);
const direct = arguments.length>2 ? arguments[2] : 1; //Default to ascending
const propPath = (prop.constructor===Array) ? prop : prop.split(".");
clone.sort(function(a,b){
for (let p in propPath){
if (a[propPath[p]] && b[propPath[p]]){
a = a[propPath[p]];
b = b[propPath[p]];
}
}
// convert numeric strings to integers
a = a.match(/^\d+$/) ? +a : a;
b = b.match(/^\d+$/) ? +b : b;
return ( (a < b) ? -1*direct : ((a > b) ? 1*direct : 0) );
});
return clone;
}
const resultsByObjectId = sortByProperty(results, 'attributes.OBJECTID');
const resultsByObjectIdDescending = sortByProperty(results, 'attributes.OBJECTID', -1);
First extract the JSON encoded data:
var data = JSON.parse(yourJSONString);
var results = data['results'];
Then sort with a custom(user) function:
results.sort(function(a,b){
//return a.attributes.OBJECTID - b.attributes.OBJECTID;
if(a.attributes.OBJECTID == b.attributes.OBJECTID)
return 0;
if(a.attributes.OBJECTID < b.attributes.OBJECTID)
return -1;
if(a.attributes.OBJECTID > b.attributes.OBJECTID)
return 1;
});
I assumed you wanted to sort by OBJECTID
, but you can change it to sort by anything.
you can sort an ordered array of anything by providing a custom compare function as a parameter to Array.Sort()
.
var myObject = /* json object from string */ ;
myObject.results.sort(function (a, b) {
// a and b will be two instances of your object from your list
// possible return values
var a1st = -1; // negative value means left item should appear first
var b1st = 1; // positive value means right item should appear first
var equal = 0; // zero means objects are equal
// compare your object's property values and determine their order
if (b.attributes.COMMERCIALNAME_E < a.attributes.COMMERCIALNAME_E) {
return b1st;
}
else if (a.attributes.COMMERCIALNAME_E < b.attributes.COMMERCIALNAME_E) {
return a1st;
}
else {
return equal;
}
});
you can easily do it with array.sort()
[
{ name: "Robin Van Persie", age: 28 },
{ name: "Theo Walcott", age: 22 },
{ name: "Bacary Sagna", age: 26 }
].sort(function(obj1, obj2) {
// Ascending: first age less than the previous
return obj1.age - obj2.age;
});
// Returns:
// [
// { name: "Theo Walcott", age: 22 },
// { name: "Bacary Sagna", age: 26 },
// { name: "Robin Van Persie", age: 28 }
// ]
example is taken from here, learn more about it from here
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