I have a list like so:
List<string> _unWantedWords = new List<string> { "word1", "word2", "word3" };
And I have a string like so:
string input = "word1mdjw ksjcword2 d word3fjwu";
I would like to remove the unwanted words in the input string, but strings are immutable in C#, so I though I would do something fancy in one swoop with a lambda expression. Like this:
string output = _unWantedWords.Select(x => input.Replace(x, ""));
But I can't seem to get it to work, any ideas? :)
Daniel
There're subtle problems in general case with the task:
Shall we do it recursively?
"woword1rd1ABC" -> "word1ABC" -> ABC
| | | |
remove remove again
What is the order of removing? If we want to remove {"ab", "bac"} what is the desired result for "XabacY" then?
"XabacY" -> "XacY" // ab removed
-> "XaY" // bac removed
In the simplest case (remove words in order they appear in _unWantedWords, no recursion) you can put (let's use Linq since you've tried Select):
input = _unWantedWords.Aggregate(input, (s, w) => s.Replace(w, ""));
we can't change string itself, but we can change reference (i.e. assign to input)
You can use ForEach instead
_unWantedWords.ForEach(x => { input= input.Replace(x, "")});
You can use the ForEach function to replace the text in the input.
string output = input;
_unWantedWords.ForEach(x => output = output.Replace(x, ""));
You can create another variable as to not lose the original input.
This is what you need?
List < string > _unWantedWords = new List < string > {
"word1",
"word2",
"word3"
};
string input = "word1mdjw ksjcword2 d word3fjwu";
for (int i = 0; i < _unWantedWords.Count; i++) {
input = input.Replace(_unWantedWords[i], "");
}
DotNet Fiddle : https://dotnetfiddle.net/zoY4t7
Or you can simply use ForEach, read more over here
_unWantedWords.ForEach(x => {
input = input.Replace(x, "");
});
StringBuilder.Replaceinstead ofString.Replace. It doesn't through off garbage like string manipulation does