CityKey | Adding uPort support to Chicago CityKey | Blockchain library
kandi X-RAY | CityKey Summary
kandi X-RAY | CityKey Summary
CityKey is a valid, government-issued ID card offered to all municipal residents to prove identity and residency for city programs and services. Our project's goal is to increase the adoption of decentralized ID's by bridging on-chain and off-chain identities. By using uPort, a self-sovereign identity system built on the Ethereum blockchain, users will have a secure, cost effective and interoperable blockchain identity.
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Trending Discussions on CityKey
QUESTION
I have a table with the total sales of each city for each year, but my table doesn't have sales for cities in some years and we don't see that information as well.
Now I want to prepare a result set saying the sales of all city's in year and display the cities which don't have sales in a year with value 0
City table
CityKey City 1 NYC 2 Dallas 3 San FranciscoTransaction table
City Total sales Year NYC 100 2019 Dallas 50 2019 San Francisco 100 2019 NYC 222 2020Output - transactions per city:
City Total sales Year NYC 100 2019 Dallas 50 2019 San Francisco 100 2019 NYC 222 2020 Dallas 0 2020 San Francisco 0 2020 ...ANSWER
Answered 2021-Apr-20 at 16:20Use a cross join
to generate all the rows, then left join
to bring in the existing data:
QUESTION
I am using google maps to display markers on google maps. When I enter the data that is hardcoded it shows the markers but when I pass the JSON data to the markers it does not show. I compare the two there is no difference both are a list of markers. Can Anyone guide me on what am I doing wrong? Here is my code
...ANSWER
Answered 2020-Oct-26 at 06:37This occurred due to the provider package I am using to get the value I stored the value in the var which the provided is changing as it entered in the build context. All I do is stored in the final then pass the arguments to the map it resolve my issue.
QUESTION
I want to send form data in flutter using the HTTP package. Getting the error:FormatException: Unexpected character (at character 1) I/flutter (30465): I am sending the form data in the HTTP post request.
...ANSWER
Answered 2020-Oct-14 at 06:25I have to use a multipart request for request. Thanks for your help.
QUESTION
I have small issue that search result showing up even though without searching keys. here's snippet. this is view:
...ANSWER
Answered 2020-Jun-18 at 16:27the solution is easy just don't pass the $doctors variable to view(or better say that pass and empty var) and in view detect its empty and say no results for searching. here's the code:
QUESTION
I'm trying to get all cities(Tỉnh/ Thành), districts(Quận/ Huyện), wards(Phường/Xã) and streets(Đường/Phố ) informations(include name and value aka of it in option attribute) from these dropdown selects in this site https://alonhadat.com.vn/dang-tin-nha-dat.html
The district select box data only show based on the cities, the wards and streets select box data only show on based on the districts so in order to get all the data i need to simulate click on select options to get the next data
i had wrote those these 2 function to run in the console in order to crawl data:
...ANSWER
Answered 2019-Aug-21 at 05:01Do a $('#tinh').trigger('change')
after you change the select
value.
QUESTION
I want to get a toast notification every time I catch an error in the fetch function.I am using a loop inside a component before the return to fetch data about different cities with accuweather api.
This is my handle errors function:
ANSWER
Answered 2019-Dec-22 at 10:21Where do you run your "fetch code"? I believe it should be somewhere inside useEffect
(componentDidMount
) otherwise it's being run all the time when the component re-renders.
QUESTION
I've got an xml file with this structure
...ANSWER
Answered 2019-Oct-30 at 15:49If you are grouping student
by city
, then:
QUESTION
UPDATE 1 STARTS
Issue is that I am not able to get all the cities and locations in sequence once I draw the FormArray again and this is becuase of the loop only. Anyways, I am new to TS, you might understand much better. Thanks again.
...ANSWER
Answered 2019-Sep-02 at 20:42Once you add async
to a method, it will always return a Promise
. Where T
is whatever you return, string
, void
, w/e.
That's the whole idea of async
, and the only way to get the right value is to use then
. Your async
here is actually not necessary, because you are returning another Promise
, but that's beside the point :)
Best would be to use type hints, otherwise there is no real reason to use TypeScript
. This way the compiler gives you the hints and errors, and you would have been notified of your error:
QUESTION
A GeoJson with point features contains two attributes: City and Rating. City as identifier is never changing, but Rating will be updated on a regular basis. The new Rating is stored in a dictionary as vales ("dnew"). My for loop is not working well. Please see the code below, where "#here is the problem" marks the problem which I cannot solve.
...ANSWER
Answered 2018-Nov-03 at 17:05It misses a number index after "features" as it's a list not a dictionary.
data["features"][0]["properties"]["Rating"]
QUESTION
The situation is: I have an array of cities
, function getCityForecast
that fetches forecast for each of them and returns the received converted data into a needed format. I need to save them into the array and save this array in state
of the component
.
ANSWER
Answered 2018-May-17 at 18:21You should make renderCities
an async function and await
the promise:
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