On Sunday, 18 May 2014 at 19:09:52 UTC, Chris Cain wrote:
On Sunday, 18 May 2014 at 18:55:59 UTC, Tim wrote:
Hi everyone,
is there any chance to modify a char in a string like:
As you've seen, you cannot modify immutables (string is an
immutable(char)[]). If you actually do want the string to be
modifiable, you should define it as char[] instead.
Then your example will work:
void main()
{
char[] sMyText = "Replace the last char_";
sMyText[$ - 1] = '.';
}
If you actually want it to be immutable, you can still do it,
but you can't modify in-place, you must create a new string
that looks like what you want:
void main()
{
string sMyText = "Replace the last char_";
sMyText = sMyText[0 .. $-1] ~ ".";
// you would do
//sMyText[0 .. 5] ~ "." ~ sMyText[6..$];
// to "replace" something in the 5th position
}
Note that the second method allocates and uses the GC more
(which is perfectly fine, but not something you want to do in a
tight loop). For most circumstances, the second method is good.
Thanks - I already tried:
void main()
{
char[] sMyText = "Replace the last char_";
sMyText[$ - 1] = '.';
}
but I always getting "Error: cannot implicitly convert expression
("Replace the last char_") of type string to char[]". I know, I
can use cast(char[]) but I don't like casts for such simple
things...
