JavaScript: sort object properties by value (numeric or string)

sort-object-properties-by-value.md

Sort object properties by value (values are text)

I have following object:

var cities={10:'Tashkent', 14:'Karakalpakiya', 16:'Andijan'};

I want sort it by city names, so after sort it should be:

var cities={16:'Andijan', 14:'Karakalpakiya', 10:'Tashkent'};

But I can't sort object properties, instead can convert object into array, then sort items.

function sortProperties(obj)
{
  // convert object into array
	var sortable=[];
	for(var key in obj)
		if(obj.hasOwnProperty(key))
			sortable.push([key, obj[key]]); // each item is an array in format [key, value]
	
	// sort items by value
	sortable.sort(function(a, b)
	{
		var x=a[1].toLowerCase(),
			y=b[1].toLowerCase();
		return x<y ? -1 : x>y ? 1 : 0;
	});
	return sortable; // array in format [ [ key1, val1 ], [ key2, val2 ], ... ]
}

Example:

var sortedCities=sortProperties(cities);
console.log(sortedCities); // [[16, 'Andijan'], [14, 'Karakalpakiya'], [10, 'Tashkent']]

Sort object properties by value (values are numbers)

I have following object:

var cities={Tashkent:447, Karakalpakiya:900, Andijan:120};

I want sort it by city rating, so after sort it should be:

var cities={Andijan:120, Tashkent:447, Karakalpakiya:900};

But again I can't sort object properties, instead can convert object into array, then sort items.

function sortProperties(obj)
{
  // convert object into array
	var sortable=[];
	for(var key in obj)
		if(obj.hasOwnProperty(key))
			sortable.push([key, obj[key]]); // each item is an array in format [key, value]
	
	// sort items by value
	sortable.sort(function(a, b)
	{
	  return a[1]-b[1]; // compare numbers
	});
	return sortable; // array in format [ [ key1, val1 ], [ key2, val2 ], ... ]
}

Example:

var sortedCities=sortProperties(cities);
console.log(sortedCities); // [[Andijan, 120], [Tashkent, 447], [Karakalpakiya, 900]]

###Improved version with additional parameter to set sort type (numeric or text)

/**
 * Sort object properties (only own properties will be sorted).
 * @param {object} obj object to sort properties
 * @param {bool} isNumericSort true - sort object properties as numeric value, false - sort as string value.
 * @returns {Array} array of items in [[key,value],[key,value],...] format.
 */
function sortProperties(obj, isNumericSort)
{
	isNumericSort=isNumericSort || false; // by default text sort
	var sortable=[];
	for(var key in obj)
		if(obj.hasOwnProperty(key))
			sortable.push([key, obj[key]]);
	if(isNumericSort)
		sortable.sort(function(a, b)
		{
			return a[1]-b[1];
		});
	else
		sortable.sort(function(a, b)
		{
			var x=a[1].toLowerCase(),
				y=b[1].toLowerCase();
			return x<y ? -1 : x>y ? 1 : 0;
		});
	return sortable; // array in format [ [ key1, val1 ], [ key2, val2 ], ... ]
}