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DART QUESTIONS

create widget for each item in the list in Flutter Dart
create widget for each item in the list in Flutter Dart
hop of those help? I am populating an array from json data in Dart , Use map function.Example:
TAG : dart
Date : October 25 2020, 07:10 AM , By : CyberPhantom
Dart: upload .jpg file to google Drive
Dart: upload .jpg file to google Drive
I wish this help you Maybe you could use the googleapis package. It could be simpler to use.Add this dependencies in your pubspec.yaml
TAG : dart
Date : October 22 2020, 06:10 AM , By : szty
Error Running Gradle on Flutter with Visual Studio Code
Error Running Gradle on Flutter with Visual Studio Code
it helps some times After many researches on how to fix my debugging issue with visual studio code proves abortive then i tried switching to android studio and downgrading my windows 10 to 8, but still that didn't solve it, it worsen the case.I tried
TAG : dart
Date : October 19 2020, 06:10 PM , By : Raelene Price
StaggeredGridView not scrolling after updating Flutter
StaggeredGridView not scrolling after updating Flutter
seems to work fine The BoxHitTestResult exception was fixed in new version of flutter_staggered_grid_view 0.3.0You can check changelog here
TAG : dart
Date : October 19 2020, 06:10 AM , By : ish
Provider Throw Errors in InitState. Provider.of<SomeProvider>(context)
Provider Throw Errors in InitState. Provider.of<SomeProvider>(context)
I wish did fix the issue. Provider.of(context, listen: false).selectedProduct and ensure there are no NotifyListeners in the initState call.
TAG : dart
Date : October 18 2020, 06:10 PM , By : ChadP
How to Render data from Request inside a FutureBuilder
How to Render data from Request inside a FutureBuilder
I think the issue was by ths following , I'm trying to list pokemons from my api, its works when i call the list but when i try to get the data for each pokemon it doesn't render the data. , One way is to create a FutureBuilder per item, like so:
TAG : dart
Date : October 17 2020, 06:10 AM , By : harshad velapure
How to delete/detect any emoji as a whole from a string in Flutter?
How to delete/detect any emoji as a whole from a string in Flutter?
seems to work fine Update Dart team released a helper package that helps achieving this. String.characters.skipLast(1) should be able to do what you expect.
TAG : dart
Date : October 16 2020, 06:10 AM , By : Heikki K
How to force flutter to use wifi rather than 4G?
How to force flutter to use wifi rather than 4G?
I hope this helps . Core Flutter framework has not that feature yet(and won't have at least for a long time imo).When it comes hardware related things, you can almost say that native code is only way to go. Good thing is there many official third pa
TAG : dart
Date : October 14 2020, 01:00 PM , By : mckenzma
Dart code reformat didn't give me the expected format
Dart code reformat didn't give me the expected format
To fix the issue you can do Add trailing commas like on this example: https://flutter.dev/docs/development/tools/formattingSo your code would become:
TAG : dart
Date : October 14 2020, 01:00 AM , By : Adrian Moreno
PlatformException (PlatformException(sign_in_failed, com.google.android.gms.common.api.ApiException: 12500: , null))
PlatformException (PlatformException(sign_in_failed, com.google.android.gms.common.api.ApiException: 12500: , null))
will be helpful for those in need The OP, @Mircea, specifically mentioned error 12500. This is how I overcame that error:I have spent the last few days running into the same problem. I refactored my code dozens of times, added break points, reset the
TAG : dart
Date : October 14 2020, 01:00 AM , By : user6023203
Flutter[desktop]: how to get input from physical keyboard without textfield?
Flutter[desktop]: how to get input from physical keyboard without textfield?
hop of those help? You want a RawKeyboardListener.An important caveat is that desktop support for that is still a work in progress; on Linux and Windows you'll currently get an Android key event that's only partially populated.
TAG : dart
Date : October 13 2020, 10:00 PM , By : StackStu
Flutter: upload image using binary body
Flutter: upload image using binary body
I hope this helps . The body parameter of the put method accepts a List that will be used as a list of bytesFrom the http API reference: https://pub.dev/documentation/http/latest/http/put.html
TAG : dart
Date : October 13 2020, 09:00 PM , By : Carlos Robert
How to do encryption like android's "PBEWithMD5AndDES" in flutter dart?
How to do encryption like android's "PBEWithMD5AndDES" in flutter dart?
Does that help PBEWithMD5AndDES uses PBKDF1 to generate the key material (not PBKDF2). This gives you 128 bits of key material that you then use as two 64 bit halves as the key and the IV for DES.Derive the key and IV as follows - I've plugged in som
TAG : dart
Date : October 13 2020, 12:00 PM , By : Amit Vashisht
Why I cant use spread operator in this case?
Why I cant use spread operator in this case?
With these it helps You currently can use the spread operator only for collection literals ([] for List, {} for Map or Set).From Bob Nystrom's article introducing Dart 2.3's new features:
TAG : dart
Date : October 13 2020, 11:00 AM , By : user6025179
Flutter The const variable 'IconData' must be initialized
Flutter The const variable 'IconData' must be initialized
fixed the issue. Will look into that further I'm trying to use Flutter Icons on our project and after downloading font and dart class i put them into project, but for dart class i get this error , Variable names may not start with a digit. Change it
TAG : dart
Date : October 13 2020, 10:00 AM , By : Rémy
How to set literals after Dart 2.2
How to set literals after Dart 2.2
it should still fix some issue Set literals were not supported until 2.2, How to set literals after Dart 2.2. Please feel free to comment. Thank you. , You use { and } to specify Set (and Map) literals:
TAG : dart
Date : October 11 2020, 09:00 PM , By : Laura Nesvat
Dart_LoadScriptFromKernel: The binary program does not contain 'main'
Dart_LoadScriptFromKernel: The binary program does not contain 'main'
I think the issue was by ths following , I just run this code in VsCode and show this problem Dart_LoadScriptFromKernel: The binary program does not contain 'main'. , try saving it in your folder it works 100% and name it main
TAG : dart
Date : October 10 2020, 06:00 PM , By : Joe Pallett
How to set final/const properties in Dart constructor
How to set final/const properties in Dart constructor
like below fixes the issue From the Dart language tour:
TAG : dart
Date : October 10 2020, 01:00 PM , By : João Félix
What is the best way to trim a trailing character in Dart?
What is the best way to trim a trailing character in Dart?
this one helps. There is no specific functionality to trim non-whitespace from the end of a string. Your RegExp based approach is reasonable, but can be dangerous when the character you want to remove is meaningful in a RegExp.I'd just make my own fu
TAG : dart
Date : October 08 2020, 02:00 PM , By : Shandy Tsai
How do I get the AstNode from some Element, in Dart Analyzer / source-gen?
How do I get the AstNode from some Element, in Dart Analyzer / source-gen?
should help you out I'm using source_gen to parse some Dart files, through the Dart analyzer. , Got it:
TAG : dart
Date : October 08 2020, 10:00 AM , By : Steve Mieskoski
Difference between x = -5.abs() and print(x.abs())?
Difference between x = -5.abs() and print(x.abs())?
fixed the issue. Will look into that further I think what Dart does is: var x = (-1)*5.abs();You can use var x = (-5).abs(); to get 5
TAG : dart
Date : October 07 2020, 09:00 AM , By : Jakub Majdl
Can you specify a List<T> with specific length as a type
Can you specify a List<T> with specific length as a type
wish of those help Let's assume we are designing a sudoku model which takes 9 Tile3x3 objects as a list. How would I explicitly specify the length of List so that it can only have 9 objects of Tile3x3s. , You can create a fixed length list in Dart li
TAG : dart
Date : October 07 2020, 01:00 AM , By : Piyush Gupta
Is there a Dart function to convert List<int> to Double?
Is there a Dart function to convert List<int> to Double?
I wish did fix the issue. I guess your mean to convert the list of ints to a list of floats, not to a single float, right? First, dart has no type called float. Instead it has type double. To convert it, you can use the map() function:
TAG : dart
Date : October 06 2020, 08:00 PM , By : J. S.
How can I check if a string contains a substring, while ignoring case
How can I check if a string contains a substring, while ignoring case
this will help You can pass in a regex to the contains method with the caseSensitive property set to false.
TAG : dart
Date : October 05 2020, 12:00 PM , By : newscrapy
What's the difference between double.toStringAsFixed and toStringAsPrecision in dartlang?
What's the difference between double.toStringAsFixed and toStringAsPrecision in dartlang?
will help you 1. Double.toStringAsPrecision(int)It checks how much precision you want, and accordingly it rounds the number and return the result.
TAG : dart
Date : October 04 2020, 06:00 PM , By : Krishnan
Constructor not called on static attribute
Constructor not called on static attribute
wish of those help I have a class with static final attributes and I store all the values in a list : , As written in the Dart tour guide:
TAG : dart
Date : October 04 2020, 11:00 AM , By : Josh Freeman
Function declaration vs lambdas
Function declaration vs lambdas
Hope this helps I'm not aware of any functioning difference between the two.So, I would argue readability. There is no reason to introduce the extra lambda syntax when a simple function declaration achieves the same.
TAG : dart
Date : October 04 2020, 09:00 AM , By : JonathanS
Banker's Rounding in Dart
Banker's Rounding in Dart
this one helps. Can anyone help with a Banker's rounding implementation in Dart please , I have same requirement, so i build one.banker_rounding.dart
TAG : dart
Date : October 03 2020, 12:00 AM , By : Vince
What difference between add and sink.add?
What difference between add and sink.add?
fixed the issue. Will look into that further It does the same. The purpose of the sink property are to provide a restricted interface for you streamcontroller:
TAG : dart
Date : October 02 2020, 06:00 AM , By : RTFMman
dart:html WebSocket vs dart:io WebSocket
dart:html WebSocket vs dart:io WebSocket
I wish this helpful for you The one in dart:io is used for standalone app running on Dart VM including Flutter, while the one in dart:html is for Web browsers.
TAG : dart
Date : October 01 2020, 12:00 PM , By : Dheeraj Kumar
correct way to import mydart.dart file in main
correct way to import mydart.dart file in main
it should still fix some issue That depends on how the main file itself is invoked (and where it's located). I'll assume the main.dart library is inside the lib/ directory, because otherwise you wouldn't have the two options for importing myclass.dar
TAG : dart
Date : September 28 2020, 02:00 AM , By : Karthikeyan Narayana
In Dart, how to access a parent private var from a subclass in another file?
In Dart, how to access a parent private var from a subclass in another file?
may help you . You cannot directly access a private name from a different library, and Dart does not have any privacy notation corresponding to "protected" (access from subclasses).You have to either make the property public, declare the two classes
TAG : dart
Date : September 27 2020, 08:00 PM , By : 王增宝
What is the difference between compile time constant and run time constant
What is the difference between compile time constant and run time constant
will be helpful for those in need There are no "run-time constants" in Dart, not the way the word "constant" is generally used. All constants are compile-time constants, meaning that their entire value can be determined at compile-time, they are deep
TAG : dart
Date : September 27 2020, 12:00 AM , By : Thomas
Dart "For Loop" "If Else" "Boolean return"
Dart "For Loop" "If Else" "Boolean return"
around this issue Your misunderstanding isn't in the code, but in what a "palindrome" is. A palindrome is a word that is spelled the same forwards and reversed. For example, if you took the word "racecar" and reversed the order of the letters, the re
TAG : dart
Date : September 26 2020, 03:00 PM , By : Prafull
Dart symbol literals
Dart symbol literals
it fixes the issue Symbols are not unique. They are intended to represent source names at runtime, so the symbol value of the symbol literal a (which can also be written const Symbol("a")) represents the identifier a.Symbols occur only in the more dy
TAG : dart
Date : September 24 2020, 03:00 PM , By : Jose Hernandez
How do these function return values work in Dart?
How do these function return values work in Dart?
I wish this helpful for you For your first example, countStream is a Stream of integer designed with an async*. (take care of the star)In this stream definition, Yield emit a new integer on the stream flow (of integer as said by stream < int > .
TAG : dart
Date : September 18 2020, 11:00 PM , By : Gabriel Tedeschi
Dart can't take input
Dart can't take input
it should still fix some issue You're trying to call readLineSync on the class, not on an instance. Since readLineSync isn't static, you'll need to call this on an instance of Stdin.There's a global instance of Stdin named stdin exposed through dart:
TAG : dart
Date : September 13 2020, 05:00 PM , By : PArthiban
Is there a way to add a static extension method on a class directly in Dart?
Is there a way to add a static extension method on a class directly in Dart?
around this issue Yes, the same thing is true for Dart. An extension method acts like an instance method, not like a static method. There is currently no way to add static methods to a class from outside the class.You can declare static methods in an
TAG : dart
Date : September 10 2020, 08:00 AM , By : Dark Mind
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