copii | Copy button for GitHub Readme files Ready to use
kandi X-RAY | copii Summary
kandi X-RAY | copii Summary
Copy button for GitHub Readme files Ready to use. Every example below is fully functional, you can test it by clicking the buttons.
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QUESTION
I want my program to print the text "Data has been inserted!" if I get a positive response from the database. It works perfectly except the fact that it doesn't show the text only if I press Ctrl+s.
Does anyone know how can I fix that?
Or maybe how can I tell the program to Ctrl+S automaticly?
(please ignore the other Widgets and variables, I didn't put all of them)
Please let me know if you have any suggestions.
Thanks! :)
...ANSWER
Answered 2021-Jan-25 at 18:45I'm guessing it's because _buildInsertedData
returns a widget, which you have also added to your tree - which is correct. But calling that function on onPressed doesn't update the widget in the tree. When you press the button it updates the value but you're not rebuilding the widget tree until you press Ctrl-S.
To rebuild the tree you can call
QUESTION
I constantly get this error: " RenderBox was not laid out: RenderViewport#a3518 NEEDS-LAYOUT NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE 'package:flutter/src/rendering/box.dart': Failed assertion: line 1785 pos 12: 'hasSize' " when I run this code:
(What I need is to have the 'Container' before the 'FutureBuilder', and the 'RaisedButton' after it because the 'FutureBuilder' can run multiple times, and I need just ONE container and ONE RaisedButton).
Please help me out!
...ANSWER
Answered 2021-Jan-11 at 20:54You're trying to use ListView.builder
in a FutureBuilder
which has no sizes in a Column
, so you need to constrain it somehow – either with SizedBox(height: 300, child: ListView.builder())
or with Expanded
widget
Check out this article https://flutter.dev/docs/development/ui/layout/constraints
QUESTION
So I want to make a quiz on html document. All good till I verify every question if the answer was correct or wrong.
If the answer of the question is correct I want to change the answer(button text) on green or else in red. The thing is that I show only 1 question at the time but the color update is only made after the next question appears. Is it because the document changes will happen only after the function ends? The html code is simple:
...ANSWER
Answered 2020-May-15 at 17:01Your code has no issue related with javascript's particularity, rather it's you code where you call function to display the next question in the same function in which you reveal the answer
You need to add some way user to navigate to next question when you reveal him the answer to current question
I have added Next
for that
QUESTION
I'm trying to get some data from a GraphQL query, but i'm having some trouble.
When i try to map over some JSon data, i can't get data from the arrays inside the data.
I'm not sure what i'm missing.
What i've tried:
- This works fine:
ANSWER
Answered 2019-Oct-24 at 10:04Do a conditional render.
For readability, add another function to extract name
s for each camere
.
QUESTION
I am trying to create a tree from a vector of parents. However I get a "corrupted heap error" when I create the nodes with malloc. It works for the first two children , however crashes on the third(or terminates but does not connect the root with the child.)
Unhandled exception at 0x77E8A879 (ntdll.dll) in lab7.exe: 0xC0000374: A heap has been corrupted (parameters: 0x77EC5910).
I have implemented this by, first extracting the root and creating the node and after that extracting the children of the root and creating them.
search root-> searches for the root and returns the value of it. the function that searches for the children(search key )
void create->The function that creates the children. I send a vector that contains only the children of that specific parent and not other children.
...ANSWER
Answered 2018-May-04 at 12:49I think the problem is in your main()
method, where you malloc()
with sizeof(TreeNodeParent*)
instead of sizeof(TreeNodeParent)
and assign it to rootParent
:
QUESTION
I have this script for writing some csv files to a excel from a folder:
...ANSWER
Answered 2017-Sep-13 at 14:00You can read each file twice - first header only with parameter nrows
and then body with skiprows
.
Then need write twice too.
Solution is a bit complicated, because pandas wrong parse data - not support MulttiIndex with 8
levels. If set no headers, data from header are joined with body and output is mess.
QUESTION
I have a list called rawSafirlistoflists and I work with python 3, that is looking like this:
...ANSWER
Answered 2017-Aug-20 at 14:45Using str.isdigit
is the right approach, but int(level2)
is doing nothing (useful). The call to int
returns an integer value which you then discard, it does not mutate the string level2
. (In fact, strings don't have any mutating methods on them.)
In order to fix your approach (after fixing indentation), create a new list to which you append the return values of the calls to int
(or the original value, in case str.isdigit
returns False
).
This could also be done with a list comprehension as follows.
QUESTION
So I have the following code
...ANSWER
Answered 2017-Jan-19 at 11:58as? [NSArray: NSArray]
definitively isn't correct, there-for the cast fails and the else branch is executed. It means that you are expecting a dictionary where keys and values are of type NSArray
, but you have an array or dictionaries, so it should read as? [[String: Any]]
or similar, depending on the response you didn't provide fully.
Also var CellsData = [NSArray: NSArray]()
must pe changed respectively. (btw: please familiarize yourself with cocoa touch / swift naming conventions)
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