我有一个<div class="col col-50" ng-if="categories.data.indexOf(categories.data[$index+1])!=-1">
<div class="list card" ng-click="getProducts(categories.data[$index + 1].category_id,categories.data[$index + 1].category_name)">
<div class="item item-image">
<img src="{{categories.image_path}}{{categories.data[$index + 1].category_image}}" style="min-height:250px;max-height:250px;" />
</div>
<ion-item class="item" style="text-align:center">{{categories.data[$index + 1].category_name}}</ion-item>
</div>
</div>
,我想删除一个只能出现一次的字节序列。第一个数组可能很大,但第二个数组不能超过50字节
这样做的最佳方式(也是最快的方式)是什么?
感谢您的帮助!
答案 0 :(得分:2)
您可以为此创建静态方法,如下所示:
public static class Helper
{
public static IEnumerable<byte> RemoveSubSequence(this IEnumerable<Byte> sequence, IEnumerable<Byte> subSequence)
{
List<byte> list = sequence.ToList();
byte[] subSequenceList = subSequence.ToArray();
int i = 0;
int count = 0;
for (; i < list.Count && count != subSequenceList.Length; i++)
for (int i2 = 0; i2 < subSequenceList.Length && count != subSequenceList.Length; i2++)
if (list[i + i2] == subSequenceList[i2]) count++; else count = 0;
list.RemoveRange(i - 1, count);
return list;
}
}
然后你就可以使用它:
IEnumerable<byte> bytes = new byte[] { 5, 7, 6, 9, 1, 5, 7, 6, 7, 0, 6, 4, 0, 6, 4, 8 };
IEnumerable<byte> subSequence = new byte[] { 6, 7, 0, 6, 4, 0, 6, 4, 8 };
bytes = bytes.RemoveSubSequence(subSequence);
foreach (var item in bytes) Console.Write(item + " ");
Console.WriteLine("\n\n");
输出:5, 7, 6, 9, 1, 5, 7,
答案 1 :(得分:0)
IEnumerable是readonly,如果你想删除它的一些居民,你应该把它称为列表而不是&#34;选择... bla.ToList()&#34;