I am pulling data from Firebase and in every loop I will get one piece of data in NSDictionary format (e.g. 1st loop I get {Kelvin: 10} , 2nd loop I get {John, 40}, 3rd loop I get {Mary, 27} ,etc)
I created a variable called "namedic" to store the data
var namedic = [NSDictionary]()
I then use an if statement in the loop to catch the data
if let myname = thename["name:"] as? NSDictionary {
//(thename["name:"] prints {Kelvin: 10}
self.namedic.append(myname)
}
I will then get an array of NSDictionaries
[{
"Kelvin" = 10;
}, {
"John" = 40;
}, {
"Mary" = 27;
}]
My question is, how do I sort this array of NSDictionaries in alphabetical order?
What I want is this:
[{
"John" = 40;
}, {
"Kelvin" = 10;
}, {
"Mary" = 27;
}]
Related
I have data
{
"id": 1000,
"price": "99,01USA",
},
{
"id": 1001,
"price": "100USA",
},
{
"id": 1002,
"price": "780USA",
},
{
"id": 1003,
"price": "20USA",
},
How I sort order by price (ASC , DESC)
You can alter it a little to parse price to integer and then sort it
You can create a dynamic sort function that sorts objects by their value that you pass:
function dynamicSort(property) {
var sortOrder = 1;
if(property[0] === "-") {
sortOrder = -1;
property = property.substr(1);
}
return function (a,b) {
/* next line works with strings and numbers,
* and you may want to customize it to your needs
*/
var result = (a[property] < b[property]) ? -1 : (a[property] > b[property]) ? 1 : 0;
return result * sortOrder;
}
}
So you can have an array of objects like this:
var People = [
{Name: "Name", Surname: "Surname"},
{Name:"AAA", Surname:"ZZZ"},
{Name: "Name", Surname: "AAA"}
];
...and it will work when you do:
People.sort(dynamicSort("Name"));
People.sort(dynamicSort("Surname"));
People.sort(dynamicSort("-Surname"));
Actually this already answers the question. Below part is written because many people contacted me, complaining that it doesn't work with multiple parameters.
Multiple Parameters
You can use the function below to generate sort functions with multiple sort parameters.
function dynamicSortMultiple() {
/*
* save the arguments object as it will be overwritten
* note that arguments object is an array-like object
* consisting of the names of the properties to sort by
*/
var props = arguments;
return function (obj1, obj2) {
var i = 0, result = 0, numberOfProperties = props.length;
/* try getting a different result from 0 (equal)
* as long as we have extra properties to compare
*/
while(result === 0 && i < numberOfProperties) {
result = dynamicSort(props[i])(obj1, obj2);
i++;
}
return result;
}
}
Which would enable you to do something like this:
People.sort(dynamicSortMultiple("Name", "-Surname"));
Subclassing Array
For the lucky among us who can use ES6, which allows extending the native objects:
class MyArray extends Array {
sortBy(...args) {
return this.sort(dynamicSortMultiple(...args));
}
}
That would enable this:
MyArray.from(People).sortBy("Name", "-Surname");
I have a JSON that have a JSONArray as a value in one of the json inside it. here is the example of it.
[
{
"id": 1,
"symptoms" : [{\"key\":\"sample1\",\"value\":5},{\"key\":\"sample2\",\"value\":5}]
},
{
"id": 2,
"symptoms" : [{\"key\":\"sample3\",\"value\":1}]
},
{ "id": 3,
"symptoms" : []
},
{
"id": 4,
"symptoms": [{\"key\":\"sample4\",\"value\":1}]
}
]
So what I am doing is that I am parsing the inner JSON and place it in a String Array. But whenever I look up to symptoms it skips the empty JSONArray. So whenever i print the String Array it goes like this (with the given sample on top) ["sample1", "sample2", "sample3", "sample4"]. But i want to do is to append an "" to the String Array whenever the JSONArray is empty so it should be like this ["sample1", "sample2", "sample3", "", "sample4"]. Anyone can help me with this? Here is my code
var arrayHolder: [String] = []
var idHolder: [Int] = []
for item in swiftyJSON.arrayValue {
idHolder.append(item["id"].intValue)
//for the inner JSON
let innerJSON = JSON(data: item["symptoms"].dataUsingEncoding(NSUTF8StringEncoding)!)
for symptoms in innerJSON.arrayValue {
arrayHolder.append(symptoms["key"].stringValue)
}
}
print(idHolder) // [1,2,3,4]
print(arrayHolder) // ["sample1","sample2","sample3","sample4"]
Just check if innerJSON is empty:
for item in swiftyJSON.arrayValue {
idHolder.append(item["id"].intValue)
//for the inner JSON
let innerJSON = item["symptoms"].arrayValue // non need to create a new JSON object
if innerJSON.isEmpty {
arrayHolder.append("")
} else {
for symptoms in innerJSON {
arrayHolder.append(symptoms["key"].stringValue)
}
}
}
I get the above exception at this line of code of jqGrid.src.js
fmt = $.jgrid.formatter.integer || {};
I can't for the life of me tell you what that means or why I can't get the damn thing to work. I suspect it has to do with how I am building my json object.
for(int j = rowstart; (j <= rowend && variable.Template.Count > j); j++){
PatientACOModel patMod = variable.Template[j];
var rowData = new{
id = patMod.EncounterId,
cell = new {
MRN = patMod.MRN,
Hospital_Fin = patMod.HospitalFinNumber,
First_Name = patMod.FirstName,
Last_Name = patMod.LastName,
Date_of_birth = patMod.DateOfBirth
}
};
al.Add(rowData);
}
var griddata = new {
total = variable.Template.Count % rows > 0 ? (variable.Template.Count / rows) + 1 : (variable.Template.Count / rows),
page = page,
records = al.Count,
rows = al.ToArray()
};
I have no clue what I am doing wrong? It looks like everything is set up correctly?
UPDATE
This would be the json data that is being sent back to my jqGRid... These are just a small selection of rows, and columns. Am I missing something here?
{"total": 2,
"page": 1,
"records": 15,
"rows": [{
"id": 2148,
"cell": {
"MRN": "840134833",
"Hospital_Fin": "987141516",
"First_Name": "YELLOW",
"Last_Name": "CRAYON",
"Date_of_birth": "\/Date(1253160000000)\/"
}
},
{
"id": 1898,
"cell": {
"MRN": "785528039",
"Hospital_Fin": "6669511596226",
"First_Name": "RAYFIELD",
"Last_Name": "BOYD",
"Date_of_birth": "\/Date(-720298800000)\/"
}
}]}
To eliminate this error, you need to make sure that you are including the localization file
<script src="~/Scripts/i18n/grid.locale-en.js"></script>
before the jqGrid file. That eliminated the problem for me.
I have documents with field xyz containing
{ term: "puppies", page: { skip: 1, per_page: 20 } } // not useful as a composite key...
{ page: { skip: 1, per_page: 20 }, term: "puppies" } // different order, same contents
For the sake of determining the "top" values in xyz, I want to map them all to something like
emit('term="puppies",page={ skip: 1, per_page: 20 }', 1); // composite key
but I can't get the embedded objects into a meaningful strings:
emit('term="puppies",page=[object bson_object]', 1); // not useful
Any suggestions for a function to use instead of toString()?
# return the top <num> values of <field> based on a query <selector>
#
# example: top(10, :xyz, {}, {})
def top(num, field, selector, opts = {})
m = ::BSON::Code.new <<-EOS
function() {
var keys = [];
for (var key in this.#{field}) {
keys.push(key);
}
keys.sort ();
var sortedKeyValuePairs = [];
for (i in keys) {
var key = keys[i];
var value = this.#{field}[key];
if (value.constructor.name == 'String') {
var stringifiedValue = value;
} else if (value.constructor.name == 'bson_object') {
// this just says "[object bson_object]" which is not useful
var stringifiedValue = value.toString();
} else {
var stringifiedValue = value.toString();
}
sortedKeyValuePairs.push([key, stringifiedValue].join('='));
}
// hopefully we'll end up with something like
// emit("term=puppies,page={skip:1, per_page:20}")
// instead of
// emit("term=puppies,page=[object bson_object]")
emit(sortedKeyValuePairs.join(','), 1);
}
EOS
r = ::BSON::Code.new <<-EOS
function(k, vals) {
var sum=0;
for (var i in vals) sum += vals[i];
return sum;
}
EOS
docs = []
collection.map_reduce(m, r, opts.merge(:query => selector)).find({}, :limit => num, :sort => [['value', ::Mongo::DESCENDING]]).each do |doc|
docs.push doc
end
docs
end
Given that MongoDB uses SpiderMonkey as its internal JS engine, can't you use JSON.stringify (will work even if/when MongoDB switches to V8) or SpiderMonkey's non-standard toSource method?
(sorry, can't try it ATM to confirm it'd work)
toSource method will do the work, but it adds also brackets.
for a clean document use:
value.toSource().substring(1, value.toSource().length - 1)
I have a problem with sorting collection. User saves few values and he sorts it.
At next launch program must order a new collection.
Values which have been saved by user can be in new collection, but It can be situation , when those values aren't in new collection.
I wrote some code, and I want your feedback If it has sense
var oldValues = new List<string>(new[] { "id5", "id3", "id1" });
var valuesToOrder = new List<string>(new[] { "id1", "id2", "id3", "id4" });
int numberOfReorderedValues = 0;
for (int i = 0; i < oldValues.Count; i++)
{
if (valuesToOrder.Contains(oldValues[i]))
{
int indexOfValueWhichShouldBeBefore = valuesToOrder.IndexOf(oldValues[i]);
string valueWhichShouldBeBefore = valuesToOrder[indexOfValueWhichShouldBeBefore];
string valueWhichShouldBeAfter = valuesToOrder[numberOfReorderedValues];
valuesToOrder[numberOfReorderedValues] = valueWhichShouldBeBefore;
valuesToOrder[indexOfValueWhichShouldBeBefore] = valueWhichShouldBeAfter;
numberOfReorderedValues++;
This code works, but I must tomorrow show it to my boss, and I don't go to fool
It's not clear what you're after.
It sounds like you've got 2 lists. One of them contains a list of 'required', and the other contains a list of 'pick from'.
How about use LINQ to sort?
var oldValues = new List<string>(new[] { "id5", "id3", "id1" });
var valuesToOrder = new List<string>(new[] { "id1", "id2", "id3", "id4" });
var sorted = valuesToOrder.Intersect(oldValues).OrderBy(x=>x);
// sorted now has id1 and id3, sorted alphabetically.