I have an object called Cars, then a List of objects called Colours. These Colours are the posible colours the car can come with. For Example:
Car audi = new Car();
audi.Colours.Add("Black");
audi.Colours.Add("Silver");
audi.Colours.Add("White");
Now lets theoretically these could be in any order, so I can't simply use an index.
I know I can get an item using:
audi.Colours.Find(colour => colour.Name == "Silver");
How would I change the Silver item to "Swanky Diamond" without rebuilding the whole list?
In the real life situation I'm building the list from a database and I have a unique identifier.
Thanks in advance.
You can use a combination of IndexOf
and a list indexer setter, like this:
var index = audi.Colours.IndexOf("Silver");
if (index >= 0) {
audi.Colours[index] = "Swanky Diamond";
}
If the items aren't conceptually ordered then use a HashSet
, rather than a List
.
To see if an item is contained in the set, use Contains
.
if(audi.Colours.Contains("Silver"))
{
}
To replace one item with another remove the item you wish to remove, and add the item you wish to add:
audi.Colours.Remove("Silver");
audi.Colours.Add("Swanky Diamond");
int zeroBasedIndex = audi.Colors.IndexOf("Silver")
if (zeroBasedIndex != -1)
audi.Colors[zeroBasedIndex] = "Swanky Diamond";
else
//Item Not In List
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