I have this code:
phraseSources.ToList().ForEach(i => i.JmdictMeaning ?? );
What I need to do, and I'm not it's possible using LINQ, is to remove all occurrences of a string looking like this:
[see=????????]
Note the ??? is meant to indicate there can be any amount of characters, except "]".
That appear inside of JmDictMeaning. Note there might be one or more of these but they will always start with "[see=" and end with "]"
In order to remove all [see=...] patterns you can try Regex.Replace:
using System.Text.RegularExpressions;
...
// Add ", RegexOptions.IgnoreCase" if required (if "See", "SEE" should be matched)
Regex regex = new Regex(@"\[see=[^\]]*\]");
// "abc[see=456]789" -> "abc789"
var result = regex.Replace(source, "");
In your case:
Regex regex = new Regex(@"\[see=[^\]]*\]");
var list = phraseSources.ToList();
list.ForEach(item => item.JmdictMeaning = regex.Replace(item.JmdictMeaning, ""));
Same idea if you want to filter out items with such strings:
var result = phraseSources
.Where(item => !regex.IsMatch(item.JmdictMeaning))
.ToList();
phraseSources.ToList().RemoveAll(i => i == "xyz");
Yours I imagine would probably look something like
phraseSources.ToList().RemoveAll(i => i.StartsWith("[see=") && i.EndsWith("]"));
.ToList() creates a copy, so this code will create a copy, modify that copy, and then throw that copy away.You can remove like this:
phraseSources.Select(ph => {ph.JmdictMeaning.Replace("[see=????????]", ""; return ph;})
.ToList();
Let me show an example:
public class Person
{
public string FirstName { get; set; }
public string LastName { get; set; }
}
and query should look like this:
IList<Person> persons = new List<Person>()
{
new Person(){FirstName = "one1[see=????????]", LastName = "LastName1" },
new Person(){FirstName = "two1[see=????????]", LastName = "LastName1" },
new Person(){FirstName = "three1", LastName = "LastName1" },
new Person(){FirstName = "one[see=????????]", LastName = "LastName1" },
new Person(){FirstName = "two", LastName = "LastName1" },
};
persons = persons.Select(p => { p.FirstName = p.FirstName.Replace("[see=????????]", "");
return p; })
.ToList();
ToListwill create a copy of a source string list, andForEachwill not modofy the list in-place. So you're "modifying" a copy of a copy of each string.