dart 2d list join
var a = [[1,2,3], [4,5,6], [7,8,9]];
a.map((e) => e.join(' ')).join('\n');
//"1 2 3
// 4 5 6
// 7 8 9"dart 2d list join
var a = [[1,2,3], [4,5,6], [7,8,9]];
a.map((e) => e.join(' ')).join('\n');
//"1 2 3
// 4 5 6
// 7 8 9"dart list join
[1,2,3].join(); // "123"
[1,2,3].join(','); // "1,2,3"Copyright © 2021 Codeinu
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