Is there a function to remove the last cell from array?
it's a string array like: {"a","b","c",""}.
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4An array can contain any objects/types. So please bring a little more sense to your question. Ideally provide an example of input array and required output array. And even better: show what you have tried so far to tackle the problem that didn't work. In simple words: Ask a question.Darin Dimitrov– Darin Dimitrov2011-03-31 20:51:14 +00:00Commented Mar 31, 2011 at 20:51
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7 Answers
The length of an array is immutable, but you can create a new array without the empty "" strings:
string[] newArray = myArray.Where(str => str != "").ToArray();
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Erm... just resize it
Array.Resize(ref theArray, theArray.Length -1);
From the docs
public static void Resize(ref T[] array, int newSize)
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If it's an array of strings, you can do something like:
string[] results = theArray.Where(s => !string.IsNullOrWhitespace(s)).ToArray();
If you are just going to iterate the results, there's no need to convert back into an array, and you can leave off the .ToArray() at the end.
Edit:
If you just want to remove the last cell, and not empty entries (as suggested by your edited version), you can do this using Array.Copy more efficiently than using the LINQ statement above:
string[] results = new string[theArray.Length - 1];
Array.Copy( theArray, results, results.Length );
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An array is a fixed-size collection object. That makes it woefully inadequate for what you want to do. The best you could do is create another one with one less element. That's expensive.
Fix the real problem, this should be a List<string>, now it's simple.
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var newArraySize = oldArray.Length - 1;
var newArray = new string[newArraySize];
Array.Copy(oldArray, newArray, newArraySize);
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- Create new array equal to existing array size -1
- aNewArray = aOldArray
Ofcourse you could just null the last element in your array, but that would result in problems later. Otherwise, use a nice flexible list.
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If you always want to get rid of the last element,
int[] a = new[] {1, 2, 3, 4, 5};
int[] b = new int[a.Length - 1];
Array.Copy(a, b, a.Length - 1);
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