Arrays: Difference between revisions
Content added Content deleted
(→{{header|AppleScript}}: Extended existing entry.) |
No edit summary |
||
Line 2,098:
e = b[0,1] # first row, second column
f = c[1]</lang>
=={{header|Dart}}==
<lang javascript>
main(){
// Dart uses Lists which dynamically resize by default
final growable = [ 1, 2, 3 ];
// Add to the list using the add method
growable.add(4);
print('growable: $growable');
// You can pass an int to the constructor to create a fixed sized List
final fixed = List(3);
// We must assign each element individually using the Subscript operator
// using .add would through an error
fixed[0] = 'one';
fixed[1] = 'two';
fixed[2] = 'three';
print('fixed: $fixed');
// If we want to create a fixed list all at once we can use the of constructor
// Setting growable to false is what makes it fixed
final fixed2 = List.of( [ 1.5, 2.5, 3.5 ], growable: false);
print('fixed2: $fixed2');
// A potential gotcha involving the subscript operator [] might surprise JavaScripters
// One cannot add new elements to a List using the subscript operator
// We can only assign to existing elements, even if the List is growable
final gotcha = [ 1, 2 ];
// gotcha[2] = 3 would cause an error in Dart, but not in JavaScript
// We must first add the new element using .add
gotcha.add(3);
// Now we can modify the existing elements with the subscript
gotcha[2] = 4;
print('gotcha: $gotcha');
}
</lang>
{{out}}
<pre>
growable: [1, 2, 3, 4]
fixed: [one, two, three]
fixed2: [1.5, 2.5, 3.5]
gotcha: [1, 2, 4]
</pre>
=={{header|Déjà Vu}}==
| |||