使用 Linq 将两个列表与顺序进行比较

Question

If list 1 has the following properties: {A,B,C} and list 2 has the following properties {A,C,B}, comparing them should give the result "not matched".

The item order also needs to be same.

Answer 1

不是假装得到这个作为答案，但对于未来到达这里的人来说，这应该有效：

enumerable1.SequenceEqual(enumerable2);

Answer 2

I dont think you can do this in Linq...

Try something like this

public bool CompareOrderedLists<T>(List<T> one, List<T> theOther)
{
    if(one.Length != theOther.Length) return false;

    for(var i = 0; i < one.Length; i++)
    {
        if(one[i] != theOther[i]) return false;
    }
    return true;
}

Answer 3

What you want ?

Compare two lists, with any order of elements.

Following is the Generic code:

internal class GenericListComparer<T>
{
    internal static bool Compare(List<T> firstCollection, List<T> secondCollection)
    {
        return firstCollection.TrueForAll(secondCollection.Contains) &&
               secondCollection.TrueForAll(firstCollection.Contains);
    }
}

Usage:

List<int> aList = new List<int> { 1,2,3,4};

List<int> bList = new List<int> { 1,4,3,2};

bool result  = GenericListComparer<int>.Compare(aList,bList); // Matched

bList = new List<int> { 1,4,3,2,5};

result  = GenericListComparer<int>.Compare(aList,bList); // Un-Matched

Time Complexity - O(n)