StringBuilder

[mickey]

Hello, I must append/insert few stuff in a StringB and then print it out; this my code:

StringBuilder text = new StringBuilder();
StringBuilder textBefore = new StringBuilder();
 while (something) { //do it many times
        text.append("something");
        textBefore.append("Other");   
}
 
  String result = text.insert(1, textBefore.toString()).toString();

StringBuilder text = new StringBuilder();
StringBuilder textBefore = new StringBuilder();
 while (something) { //do it many times
        text.append("something");
        textBefore.append("Other");   
}

  String result = text.insert(1, textBefore.toString()).toString();

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Now, I'm looking for a better solution, ie. using just one StringB is it possible for you?
thanks.

[SixDegrees]

Well, you could use std::string.insert(), which is a single call. Internally, however, you have to move the portion of the orignal string following the insertion point to a new location; there is no way to accomplish an insertion without breaking the string into separate pieces. All you can do is hide the internals from public view. Even appending onto the end will often involve a copy, unless the string class in question provides additional buffering - wasteful, and ultimately futile, since the buffer size can always be exceeded, requiring a copy again.

[wysota]

Did you try using std::rope?

[mickey]

sorry, I'm using Java.

[wysota]

Use rope for java then

[mickey]

WHy; better? Can't I simplify that using StringBuilder?

[wysota]

WHy; better?

Faster.

Can't I simplify that using StringBuilder?

You can do whatever you want, I don't care I thought you had a problem with using StringBuilder.

[mickey]

I was only looking for a way to do that using a stringBuilder instead two.

[wysota]

I'm not sure what you are doing but you can have an array of strings that you fill and then assemble the whole string once you have all the elements in the array. If you want to concatenate values of two string builders then obviously you need two string builders