16 - Flutter ListView( Building Scrollable Lists ) & Spread operator( ... ) | Course FLutter بالعربي
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- Опубликовано: 20 окт 2024
- ListView :
ListView is basically a list of items. Users can scroll vertically or horizontally to see more items whenever the list is too big to fit on screen.
:
Spread operator :
Spread operator, which makes it possible for us to add multiple values to a collection. This collection can be a list, a set, or a map. This operator is a replacement for add or addAll operator in dart.
The spread operator is three dots, we can use this operator to add the list values to another list and if we want to do a null-aware check we can add a question mark to the expression which you want to add to our list.
EX :
INPUT:
void main() {
// initialise a List l1
List? l1 = ["Geeks","For","Geeks"];
// initialize another List l2 using l1
List? l2=["Wow",...l1,"is","amazing"];
// print List l2
print(l2);
}
OUTPUT: [Wow, Geeks, For, Geeks, is, amazing]
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#flutter
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