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DartDataTableExp1
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void main() { | |
// DartDataTableExp1 | |
// https://gist.github.com/JoeCodeswell/34f5fca2d4e3df65155189b3be033da3 | |
// https://dartpad.dev/34f5fca2d4e3df65155189b3be033da3 | |
JoesDataList jdl = JoesDataList(); | |
print(jdl.listOfDataItems[0].name); // Sarah | |
print(' '); | |
// jdl.Map(); // The method 'Map' isn't defined for the type 'JoesDataList' - line 4 | |
List<Avengers> avengers = Avengers.getAvengers(); | |
// No toList() | |
var rowsColon = avengers.map( | |
(avenger) => [avenger.name, avenger.weapon] | |
); | |
print(rowsColon.runtimeType); // MappedListIterable<Avengers, List<String>> | |
print(' '); | |
print(rowsColon); | |
// ([Captain America, Shield], [Thor, Mjolnir], [Spiderman, Web Shooters], [Doctor Strange , Eye Of Agamotto]) | |
print(' '); | |
// print(rowsColon.forEach( (itm) => { 'name': itm[0], 'weapon': itm[1] } ) ); | |
// `forEach` This expression has a type of 'void' so its value can't be used | |
rowsColon.forEach( (itm) => print( { 'name': itm[0], 'weapon': itm[1] } ) ); | |
/* | |
{name: Captain America, weapon: Shield} | |
{name: Thor, weapon: Mjolnir} | |
{name: Spiderman, weapon: Web Shooters} | |
{name: Doctor Strange , weapon: Eye Of Agamotto} | |
*/ | |
print(' '); | |
rowsColon.forEach( (itm) => print([itm[0], itm[1]]) ); | |
/* | |
[Captain America, Shield] | |
[Thor, Mjolnir] | |
[Spiderman, Web Shooters] | |
[Doctor Strange , Eye Of Agamotto] | |
*/ | |
print(' '); | |
// with toList() | |
var rowsColon0 = avengers.map( | |
(avenger) => [avenger.name, avenger.weapon] | |
).toList(); | |
print(rowsColon0.runtimeType); // JSArray<List<String>> | |
print(' '); | |
print(rowsColon0); | |
// [[Captain America, Shield], [Thor, Mjolnir], [Spiderman, Web Shooters], [Doctor Strange , Eye Of Agamotto]] | |
print(' '); | |
print(rowsColon0[0][0]); // Captain America | |
print(rowsColon0[0][1]); // Shield | |
print(' '); | |
print(rowsColon0[1][0]); // Thor | |
print(rowsColon0[1][1]); // Mjolnir | |
print(' '); | |
} | |
class Avengers { | |
String name; | |
String weapon; | |
Avengers({this.name, this.weapon}); | |
static List<Avengers> getAvengers() { | |
return <Avengers>[ | |
Avengers (name: "Captain America", weapon: "Shield"), | |
Avengers (name: "Thor", weapon: "Mjolnir"), | |
Avengers (name: "Spiderman", weapon: "Web Shooters"), | |
Avengers (name: "Doctor Strange ", weapon: "Eye Of Agamotto"), | |
]; // <Avengers>[] | |
} | |
} | |
class JdataItem{ | |
String name; | |
int age; | |
String title; | |
JdataItem(this.name,this.age,this.title); | |
} | |
class JoesDataList{ | |
List<JdataItem> listOfDataItems = [ | |
JdataItem('Sarah', 19, 'Student',), | |
JdataItem('Janine', 43, 'Professor',), | |
JdataItem('William', 27, 'Associate Professor',), | |
JdataItem('Frances', 37, 'Student',), | |
JdataItem('Maxine', 21, 'Student',), | |
]; | |
} | |
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