[英]Convert multi-dimensional collection to string with separator
在我處理這個答案時,我編寫了一些代碼來將通用多維集合轉換為字符串。
public static string ConvertToString<T>(this IEnumerable<IEnumerable<T>> input, string columnSplit = "", string rowSplit = "\n")
{
return string.Join(rowSplit, input.Select(r => string.Concat(string.Join(columnSplit, r.Select(c => c.ToString())))));
}
示例輸入
IEnumerable<IEnumerable<string>> input = new List<List<string>>
{
new List<string> { "R", "L", "R", "R" },
new List<string> { "L", "R", "V", "R" },
new List<string> { "L", "R", "V", "R" },
new List<string> { "R", "L", "L", "R" },
};
所需 Output
RLRR
LRVR
LRVR
RLLR
盡管代碼有效,但我認為解決方案並不優雅,因為它需要一個string.Join
inside string.Concat
inside a Select
。 有沒有辦法簡化這個解決方案。
這將在沒有 concat 和 select 的情況下工作....
public static string ConvertToString<T>(this IEnumerable<IEnumerable<T>> input, string columnSplit = "", string rowSplit = "\n")
{
return string.Join(rowSplit, input.Select(r => string.Join(columnSplit, r)));
}
適用於:
IEnumerable<IEnumerable<string>> input = new List<List<string>>
{
new List<string> { "R", "L", "R", "R" },
new List<string> { "L", "R", "V", "R" },
new List<string> { "L", "R", "V", "R" },
new List<string> { "R", "L", "L", "R" },
};
和:
IEnumerable<IEnumerable<int>> nums = new List<List<int>>
{
new List<int> { 1,2,3,4},
new List<int> { 5,6,7,8},
};
既然你無論如何都要定義擴展,為什么不一直是 go 呢?
public static string ConvertToString<T>(this IEnumerable<IEnumerable<T>> input, string columnSplit = "", string rowSplit = "\n") =>
input.Select(r => r.ConvertToString(columnSplit)).ConvertToString(rowSplit);
public static string ConvertToString<T>(this IEnumerable<T> input, string split = "") =>
string.Join(split, input.Select(i => i.ToString()));
這些是我做的一些討厭的方法
public static string ToStringEnumeration(this IEnumerable source)
{
return ToStringEnumeration(source, EnumerationMode.NewLineEach, null);
}
public enum EnumerationMode
{
NewLineEach,
Separator,
}
public static string ToStringEnumeration(this IEnumerable source, EnumerationMode mode, string separator = null)
{
return ToStringEnumeration(source, mode, separator, null, null);
}
public static string ToStringEnumeration(this IEnumerable source, EnumerationMode mode, string separator, IFormatProvider provider, string format)
{
if (source is null)
throw new ArgumentNullException(nameof(source));
if (source.IsEmpty())
return "";
var sBuilder = new StringBuilder();
foreach (var element in source)
{
var strElement = format is null ? element.ToString() : string.Format(provider, format, element);
sBuilder.Append(strElement);
if (mode == EnumerationMode.NewLineEach)
sBuilder.AppendLine();
else if (mode == EnumerationMode.Separator)
sBuilder.Append(separator);
}
var sLength = separator?.Length ?? 1;
if (mode == EnumerationMode.NewLineEach) //quit /n/r
sBuilder.Remove(sBuilder.Length - 2, 2);
else if (mode == EnumerationMode.Separator)
sBuilder.Remove(sBuilder.Length - sLength, sLength);
return sBuilder.ToString();
}
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