[英]Replace a string with each string in a list
I have a list like so:我有一个这样的清单:
List<string> _unWantedWords = new List<string> { "word1", "word2", "word3" };
And I have a string like so:我有一个像这样的字符串:
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.我想删除输入字符串中不需要的单词,但字符串在 C# 中是不可变的,所以我虽然我会用 lambda 表达式一次性做一些花哨的事情。 Like this:
像这样:
string output = _unWantedWords.Select(x => input.Replace(x, ""));
But I can't seem to get it to work, any ideas?但我似乎无法让它工作,有什么想法吗? :)
:)
Daniel丹尼尔
There're subtle problems in general case with the task:在一般情况下,任务存在一些微妙的问题:
Shall we do it recursively ?我们应该递归地做吗?
"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?删除的顺序是什么:如果我们想删除
{"ab", "bac"}
那么"XabacY"
的期望结果是什么?
"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
):在最简单的情况下(删除单词以使其出现在
_unWantedWords
,没有recursion )您可以放置(因为您已经尝试过Select
所以让我们使用Linq ):
input = _unWantedWords.Aggregate(input, (s, w) => s.Replace(w, ""));
we can't change string
itself, but we can change reference (ie assing to input
)我们不能改变
string
本身,但我们可以改变引用(即分配到input
)
This is what you need?这是你需要的吗?
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点网小提琴: https : //dotnetfiddle.net/zoY4t7
Or you can simply use ForEach
, read more over here或者你可以简单地使用
ForEach
, 在这里阅读更多
_unWantedWords.ForEach(x => {
input = input.Replace(x, "");
});
您可以使用ForEach
代替
_unWantedWords.ForEach(x => { input= input.Replace(x, "")});
You can use the ForEach function to replace the text in the input.您可以使用 ForEach 函数来替换输入中的文本。
string output = input;
_unWantedWords.ForEach(x => output = output.Replace(x, ""));
You can create another variable as to not lose the original input.您可以创建另一个变量,以免丢失原始输入。
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