Imagine I have a list with the following values:

{"abc","04","bca","10","cba","11","01"}

if I use normal c# OrderBy() on the list it will result in this:

{"01","04","10","11","abc","bca","cba"}

but what I intend is a bit the opposite:

{"abc","bca","cba","01","04","10","11"}

How can I achieve this?

CodePudding user response：

What about below solution,

var input = new List<string>(){"abc","04","bca","10","cba","11","01"};
var result = input.OrderBy(x => x.All(Char.IsDigit));

//You can even sort it, strings and numbers using `ThenBy()`
var result = input.OrderBy(x => x.All(Char.IsDigit)).ThenBy(x => x);

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Explaination:

• x.All(Char.IsDigit) returns true if the all characters are digits. Otherwise it return false. As we are writing it as a predicate, OrderBy() will sort the list based on the result of .All().
• All false values will come first(In our case, non numeric stirngs) and all numeric strings will sort at the end

CodePudding user response：

You could split the list by Regex into two lists, alphabet and numerical, then sort and then join them again.