从特定索引复制数组

Question

How can I copy an array of values to a destination array starting from a specific index without looping?

For example,if I have an array with 2 values, I have to copy those two elements to another array which has a capacity of 5 starting from index 3?

 double[] source = new double[] {1, 2};
 double[] destination = new double[5]{0,0,0,0,0};
 //How to perform this copy?
 double[] result = new double[5] {0, 0, 0, 1, 2};

Answer 1

这是你在找什么？

Array.Copy(source, 0 /*start loc*/, destination, 3 /*start loc*/, 2 /*count*/);

Answer 2

使用Array.CopyTo或静态方法Array.Copy 。

source.CopyTo(destination, 3);

Answer 3

double[] source = new double[] {1, 2};
 double[] destination = new double[5]{0,0,0,0,0};
 //How to perform this copy?
ArrayList result = new ArrayList();
result.AddRange(source);
result.AddRange(destination);
destination = result.ToArray();