I'm looking to take the result of a survey that I created using JSON, add up the values associated with the objects from that survey in order to produce a sum. However, I am unsure of how to call upon the items within the Survey Result
I would apprecaite any help.
Survey Result: {
"Number of Polarization Images":1,
"Possibility of Primes":2,
"Available Layers":2,
"Image Quality":3,
"Lead Rank":3,
"Repairs Report":2,
"Topography":2,
"AOI Size":1,
"Field Verification":2,
"Season":1
}
Use .reduce combined with Object.values for browsers that support it
var sum = Object.values( survey_results_variable ).reduce((p,v)=>p+v,0);
For browsers that do not support Object.values use Object.keys
var sum = Object.keys( survey_results ).reduce((p,v)=>p+survey_results[v],0);
Simple solution is
var sum = 0;
for (k in survey_result) sum += survey_result[k];
The bit you might have been missing was the for...in way of iterating over properties in an object.
Related
I'm trying to filter a set of objects based on values in one of their elements based on another array. I've got it working with filter just fine if the search is "OR" - it returns give me all objects for which at least one of the strings in the search array is found.
But I can't figure out how to make it work as an AND search - returning only the objects that match ALL of the strings in the search array.
Example:
struct Schedule {
let title: String
let classTypes: [String]
}
let schedule1 = Schedule(title: "One", classTypes: ["math","english","chemistry","drama"])
let schedule2 = Schedule(title: "Two", classTypes: ["pe","math","biology"])
let schedule3 = Schedule(title: "Three", classTypes: ["english","history","math","art"])
let schedules = [schedule1, schedule2, schedule3]
let searchArray = ["math", "english"]
//works for OR - "math" or "english"
var filteredSchedules = schedules.filter { $0.classTypes.contains(where: { searchArray.contains($0) }) }
I'd like to find a way for it to use the same search array
let searchArray = ["math", "english"]
But only return items 1 & 3 - as they both have BOTH math and english in the list.
There are good examples of AND conditions when the AND is across different search criteria: car type and colour - but I've been unable to find an example where the criteria are dynamically based on items in an array. For context, I could have dozens of schedules with 20+ class types.
You can work with a Set, isSubset will return true if the schedules element contains all elements of the searchSet
let searchSet = Set(searchArray)
var filteredSchedules = schedules.filter { searchSet.isSubset(of: $0.classTypes) }
As suggested by #LeoDabus it might be worth changing the type of classTypes to Set instead of arrays (if order doesn't matter) since they seems to be unique and then the filtering can be done in the opposite way without the need to convert searchArray each time
var filteredSchedules = schedules.filter { $0.classTypes.isSuperset(of: searchArray) }
I got two arrays from API call,
One is nameArray - which contains recipe names ( menuNameArray = ["pohe","bread","cheese chilli toast"]
And another array - which contains prices of those recipes (menuPriceArray = ["10", "40", "120"].
I have got theses two arrays from API call.
I am displaying both the arrays on the table view & I am searching through the menuNamesArray because I want to search by recipe names.
I am getting recipe names by searching those from menuNameArray. Now I want menuPriceArray to get updated also according to searched menuName Array.
means if I search for "bread" then I must get price value as "40" and accordingly for other names also.
How should I perform such filtering on the second array?
My code Snippet -
//MARK: UISearch result update delegate
func updateSearchResults(for searchController: UISearchController) {
// here arrFilter is the resulting array to sotre searched items from menuNamesArray
arrFilter.removeAll(keepingCapacity: false)
let searchPredicate = NSPredicate(format: "SELF CONTAINS[c] %#", searchController.searchBar.text!)
let array = (menuNamesArray as NSArray).filtered(using: searchPredicate)
let result = menuPriceArray.firstIndex(of: array.startIndex)
arrFilter = array as! [String]
self.tblSearch.reloadData()
//here now I got the searched menu names, Now I want prices for searched menu names from menuPrice Array..
}
Never use multiple arrays as data source.
Swift is an object oriented language. Take advantage of it.
Create a struct
struct Menu {
let name : String
let price : Double
}
and a data source array
var menues = [Menu]()
Filter the array by name and get the price, pretty easy and straightforward
if let foundMenu = menues.filter(where: {$0.name == "bread"}) {
print(foundMenu.price)
}
You can merge the two arrays into one array of dictionary elements.
I'm trying to automate the collection of phone numbers from an API into a Google Sheet with app script. I can get the data and place it in an array with the following code:
const options = {
method: 'GET',
headers: {
Authorization: 'Bearer XXXXXXXXXXXXXXX',
Accept: 'Application/JSON',
}
};
var serviceUrl = "dummyurl.com/?params";
var data=UrlFetchApp.fetch(serviceUrl, options);
if(data.getResponseCode() == 200) {
var response = JSON.parse(data.getContentText());
if (response !== null){
var keys = Object.keys(response.call).length;
var phoneArray = [];
for(i = 0; i < keys; i++) {
phoneArray.push(response.call[i].caller.caller_id);
}
This works as expected - it grabs yesterday's caller ID values from a particular marketing campaign from my API. Next, I want to import this data into a column in my spreadsheet. To do this, I use the setValues method like so:
Logger.log(phoneArray);
var arrayWrapper = [];
arrayWrapper.push(phoneArray);
Logger.log(arrayWrapper);
for(i = 0; i < keys; i++) {
var sheet = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet();
var cell = sheet.getRange("A8");
cell.setValues(arrayWrapper);
}
}
}
}
I am aware that I need my array length to equal the length of the selected range of cells in my sheet. However, I get conflicting errors depending on the length I set for my getRange method. If I set it to a single cell, as you see above, the error I get is:
The number of columns in the data does not match the number of columns in the range. The data has 8 but the range has 1.
However, if I set the length of my range to 8 (or any value except 1), I get the error:
The number of columns in the data does not match the number of columns in the range. The data has 1 but the range has 8.
As you see, the error swaps values. Now I have the appropriate number of columns in the range, but my script only finds 1 cell of data. When I check the log, I see that my 2D array looks normal in both cases - 8 phone numbers in an array wrapped in another array.
What is causing this error? I cannot find reference to similar errors on SO or elsewhere.
Also, please note that I'm aware this code is a little wonky (weird variables and two for loops where one would do). I've been troubleshooting this for a couple hours and was originally using setValue instead of setValues. While trying to debug it, things got split up and moved around a lot.
The dimension of your range is one row and several columns
If you push an array into another array, the dimension will be [[...],[...],[...]] - i.e. you have one column and multiple rows
What you want instead is one row and multiple columns: [[...,...,...]]
To achieve this you need to create a two-dimensional array and push all entries into the first row of your array: phoneArray[0]=[]; phoneArray[0].push(...);
Sample:
var phoneArray = [];
phoneArray[0]=[];
for(i = 0; i < keys; i++) {
var phoneNumber = response.call[i].caller.caller_id;
phoneNumber = phoneNumber.replace(/-/g,'');
phoneArray[0].push(phoneNumber);
}
var range = sheet.getRange(1,8,1, keys);
range.setValues(phoneArray);
So I figured out how to make this work, though I can't speak to why the error is occurring, or rather why one receives reversed error messages depending on the setRange value.
Rather than pushing the whole list of values from the API to phoneArray, I structured my first for loop to reset the value of phoneArray each loop and push a single value array to my arrayWrapper, like so:
for(i = 0; i < keys; i++) {
var phoneArray = [];
var phoneNumber = response.call[i].caller.caller_id;
phoneNumber = phoneNumber.replace(/-/g,'');
phoneArray.push(phoneNumber);
arrayWrapper.push(phoneArray);
}
Note that I also edited the formatting of the phone numbers to suit my needs, so I pulled each value into a variable to make replacing a character simple. What this new for loop results in is a 2D array like so:
[[1235556789],[0987776543],[0009872345]]
Rather than what I had before, which was like this:
[[1235556789,0987776543,0009872345]]
It would appear that this is how the setValues method wants its data structured, although the documentation suggests otherwise.
Regardless, if anyone were to run into similar issues, this is the gist of what must be done to fix it, or at least the method I found worked. I'm sure there are far more performant and elegant solutions than mine, but I will be dealing with dozens of rows of data, not thousands or millions. Performance isn't a big concern for me.
var correct = [[data],[data]] -
is the data structure that is required for setValues()
therefore
?.setValues(correct)
Good day
I was wondering if someone can assist me in calculating the sum value of a array of data.
var products = [{'size':'400' },{'size':'500' }] ;
angular.forEach(products, function(item){
var total = 0;
total += item.size++;
return total;
});
How do I use $q.all() statement to store up this information as the file download section am using ignores my angular.forEach statment and just checks individual items instead.
Use reduce instead of angular.forEach
const productSum = products.reduce((sum, product) => sum + parseInt (product.size, 10), 0)
$q.all is for computing multiple promises. I think you are looking in the wrong direction.
if you want to get sum of all sizes then use javascript reduce method. It will return the sum of all sizes efficiently.
var products = [{'size':'400' },{'size':'500' }] ;
var sum = products.reduce((a,b) => parseInt(a.size) + parseInt(b.size))
console.log(sum)
About $q.all. $q.all typically use to send multiple http request one shot. If you want send the sum to your service then bind the sum as data property to one of or all your http requests (depend on your requirement).
I'm attempting to get the number of errors in $scope.someForm.$error and can't figure out a way to get the count.
Example $error:
$scope.someForm.$error
Object{date-disabled: Array[1], required: Array[1]}
Expected Result is 2.
Is there a way to get the count of objects that resulted in an error?
I'm trying to do this because I ran into an issue with bootstraps date-picker invalidating my angular form.
https://github.com/angular-ui/bootstrap/issues/3439
Now I want to code around the issue with a check. I want to say $scope.someForm.$error count is 1 and is date-disabled continue with form submission.
Iterate the object keys and total the array lengths:
var totalErrors = 0;
for (var error in $scope.someForm.$error) {
if ($scope.someForm.$error.hasOwnProperty(error)) {
totalErrors += $scope.someForm.$error[error].length;
}
}