CODEWITHSUNDEEP
c#
mrblah
mrblah

Reputation: 103487

string.insert in c# doesn't overwrite does it?

string.insert in c# doesn't overwrite the character that is in the startindex does it?

Upvotes: 2

Views: 3846

Answers (6)

Mike Two
Mike Two

Reputation: 46173

No. Strings are immutable. string.Insert returns a new string with the inserted value. It does not change the old string.

string newString = oldString.Insert(3, "foo");

oldString does not change. But "foo" is now in newString.

Upvotes: 2

Rap
Rap

Reputation: 7282

No, definitely not.

But the best practice is to use StringBuilder instead of immutable strings if you're doing changes to the string in-flight.

Here's a nice overview.

Upvotes: 0

Franci Penov
Franci Penov

Reputation: 75982

Insert does addition only. Replace does change.

Edit: As others pointed out, strings are actual immutable, so both methods will return copy of your initial string. However, the semantic of the operations is as above.

Upvotes: 2

Pete OHanlon
Pete OHanlon

Reputation: 9146

No. It just tells it where to insert the character, so if you had the following

string x = "ello".Insert(0, "h");

the string would actually read "hello".

Upvotes: 1

ShuggyCoUk
ShuggyCoUk

Reputation: 36438

Strings in c# are immutable. They cannot be changed except by reflection or unsafe code (and you should never do this).

All methods on string which 'modify' it instead return a new string with the appropriate modifications.

Since insert is placing one string within another the result of an insert of string s1 into string s2 will be a string of length s1.Lnegth + s2.Length, no characters are lost.

Upvotes: 1

Greg
Greg

Reputation: 16680

For example, the return value of "abc".Insert(2, "XYZ") is "abXYZc".

So, no.

http://msdn.microsoft.com/en-us/library/system.string.insert.aspx

Upvotes: 7

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