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Can the ArrayList below be initialized directly without the need for aFileExt string array?
private static string[] aFileExt = {"css", "gif", "htm", "html", "txt", "xml" }; private System.Collections.ArrayList alFileTypes = new System.Collections.ArrayList(aFileExt); The line below is the goal, but my .Net Compiler does not like it:
private static System.Collections.ArrayList alFileTypes = new System.Collections.ArrayList({"css","gif","htm","html","txt","xml"}); I am using the .net Micro Framework and thus do not have access to generic types.
403
Java developers use the Arrays. asList() method to initialize an ArrayList. Using asList() allows you to populate an array with a list of default values. This can be more efficient than using multiple add() statements to add a set of default values to an ArrayList.
To initialize an ArrayList in Java, you can create a new ArrayList with new keyword and ArrayList constructor. You may optionally pass a collection of elements, to ArrayList constructor, to add the elements to this ArrayList. Or you may use add() method to add elements to the ArrayList.
Actually, probably the "best" way to initialize the ArrayList is the method you wrote, as it does not need to create a new List in any way: ArrayList<String> list = new ArrayList<String>(); list. add("A"); list. add("B"); list.
C# 1 or 2:
private static ArrayList alFileTypes = new ArrayList(new string[] {"css","gif","htm","html","txt","xml"}); C# 3 using an implicitly typed array:
private static ArrayList alFileTypes = new ArrayList(new[] {"css","gif","htm","html","txt","xml"}); C# 3 using a collection initializer:
private static ArrayList alFileTypes = new ArrayList{"css","gif","htm","html","txt","xml"}; Or create your own helper method:
public static ArrayList CreateList(params object[] items) { return new ArrayList(items); } then:
static ArrayList alFileTypes = CreateList("css","gif","htm","html","txt","xml"); Any reason why you're not using the generic collections, btw?
146
If you're using .NET 2.0 or greater, you should be using the generic List<T> type (even if it's List<object>, which would given you the same functionality as ArrayList).
If you're using .NET 3.5 or greater, you can use this syntax:
private static List<string> fileTypes = new List<string>() { "css","gif","htm","html","txt","xml" }; Either way, however, if you want to stick with ArrayList, you can just do:
private static System.Collections.ArrayList alFileTypes = new System.Collections.ArrayList(new object[] {"css","gif","htm","html","txt","xml"}); If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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