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QUESTION
I am building an appointment scheduling page using the table-calendar widget. I can write appointments to a firebase collection/document. Now, I need to pull the appointments from the collection and display them as a list below the calendar.
I have used this code on another page and I actually copied if from there and am using it here. The code works on the other page but I am getting the error here. There are small differences in the 2 pages but not too many. What is causing this error?
Here is the code for the calendar page.
...ANSWER
Answered 2021-Jun-12 at 21:47The itemCount
property of ListView.builder
is causing the error.
itemCount: snapshot.data.docs.length
it should be itemCount: snapshot.data.length
.
This is because the the type of data emitted by the Stream is List
. The standard List
class does not have a method called docs
so when the ListView.builder
tried to access the length property it throws the NoSuchMethodError
The same error will happen when the onTap
handler is invoked for any of the items in the list, as it too is making a reference to snapshot.data.docs
QUESTION
I am working on assigning random priorities (i.e. high, medium, low) to a list for a ServiceDesk assignment.
Before that, I was wondering how to go about storing (and printing) an array in said priority queue. This is currently what I have.
*UPDATED CODE
...ANSWER
Answered 2021-Apr-18 at 02:33Sounds like you are asking for help on how to get started. You are asking for help on learning to learn. Here is how I would approach your problem:
Apparently you are supposed to use a priority queue.
- Write a tiny program that makes a priority queue and stores strings into it, then prints them out.
- Define a class and store instances of that class into the priority queue instead of strings.
- Modify the sort criteria on the priority queue and notice that the printed sequence changes according to the sort criteria.
- Write a function that creates one class instance with random values.
- Write a function that creates all 100 class instances.
- Declare victory.
QUESTION
I'm currently working on this simple application to create a quiz of ten questions and make it random. This is my progress so far, the questions are random which is what I need, but the problem is the questions are repeating and I only need them to show once. Please help me to fix this bug.
activity_quiz.xml:
...ANSWER
Answered 2021-Feb-27 at 19:15- Create a shuffled list of questions
- Iteratively use the questions based on the shuffled order
QUESTION
I have tried web scraping on IMDB website. I am looking for Top 50 Horror Movies
. I want to scrape the movie name
, rating
, director name
, genre
, and runtime
.
I inspected element for movie name
Inspect elements for rating and director names
Inspect element for runtime, genre
I wrote a code after inspecting those elements for title, directors name, rating, runtime, genre.
...ANSWER
Answered 2021-Feb-24 at 18:17You're not handling your lists correctly. Had to be more specific on the tags and ways to search for data. And changed the findall
to find
.
QUESTION
i have table A and table B as follows:
Table A
...ANSWER
Answered 2021-Feb-23 at 00:56Let us do
QUESTION
I am trying to initialize a set with a bunch of data. But when I check some items that are already inserted with the contains function, it returns false.
What is wrong with this code?
...ANSWER
Answered 2021-Feb-21 at 04:52you initialize with name "set" but doing addAll for "proSet"? I don't see anything wrong beside it. but, for better reading options, it could be:
QUESTION
I am very new to JSON and was wondering if this is considered proper.
My intent is to pre-create some colors and attach them to one (or more) theme(s). Perhaps some themes may have other colors that, for whatever reason, have not been pre-defined. Ultimately, I will take themes and apply them to other objects in similar fashion as the colors (by name)...
...ANSWER
Answered 2021-Feb-02 at 02:18Is this considered proper format?
What you show is a well formed JSON document. Whether it contains sensible values is difficult to say without knowing whatever the requirements are, but just from a perspective of being valid JSON, I think that is.
QUESTION
I am trying to create a list from JSON file which are response>0>startXI>(0,1,2,3,4...)>player>name
and response>1>startXI>(0,1,2,3,4...)>player>name
. I tried the code below but am getting an error.
Code:
...ANSWER
Answered 2021-Jan-30 at 13:42You are looking at the incorrect key in the dictionary. The names are present as a list in data['response']['startXI']
Try this code:
QUESTION
I am looking for a faster way to load data from my json object into a multiindex dataframe.
My JSON is like:
...ANSWER
Answered 2021-Jan-05 at 05:13You can adapt the answer to a very similar question as follow:
QUESTION
I'm trying to create an accordion where a first part of the content is already visible before you collapse it.
The problem is that I just have no idea where to start this. A basic accordion is easy, but how can I display the beginning of the content (e.g the first 30 characters of the content greyed out) before the accordion is collapsed ?
I started with the structure suggested with a "teaser" from this post. I'd like that "teaser" to be the first couple characters shown from the content and when you click to collapse, the main content is displayed and the teaser disappears.
Any idea how to do that ?
...ANSWER
Answered 2020-Dec-07 at 19:54Parting from your code a made a simple example using javascript to toogle between show and hide the content. I created a function that uses the elements IDs to select em and toogle a hide
class. Then I passed this function to your a
element.
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