重复值n次 [英] Repeat values for n times

问题描述

我有一个值的集合

[1, 4, 23, 90]

，这些值应存储到重复 3 次且不重复的数组中使用 Linq

and these values should be stored into a array repeated 3 times without using Linq

[1, 1, 1, 4, 4, 4, 23, 23, 23, 90, 90, 90]

到目前为止我已经尝试过的

what I've tried so far

int[] collection = { 1, 4, 23, 90 };
int multiplier = 3;
int[] result = new int[collection.Length * multiplier];
for (int i = 0; i < collection.Length; i++)
    for (int j = 0; j < multiplier; j++)
        result[i + j] = collection[i];

但不知何故，只有$ 6 个字段数组已填充

but somehow only the first 6 fields of the array are filled

推荐答案

如果您不是正在寻找 Linq 解决方案，

If you are not looking for a Linq solution,

插入重复值linq

然后只需计算要放入结果中的项目： i 次结果的项目对应于 i /乘数 集合

then just compute which item to put into result: i-th result's item corresponds to i / multiplier collections one

int[] collection = new int[] { 0, 2, 25, 30 };
int multiplier = 3;
int[] result = new int[collection.Length * multiplier];

for (int i = 0; i < result.Length; i++)
  result[i] = collection[i / multiplier];

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