Re: [Vala] string manipulation question

[Charles Hixson <charleshixsn earthlink net>]

On 05/02/2010 01:42 AM, Frederik wrote:
> Am 01.05.2010 23:15, Charles Hixson wrote:
>    
> > Is there a better way to do this?
> >      
> You should use a 'join' method to make the intentions of your code clear and
> to prepare for code reuse:
>
> string htmlCardItemSeparated(string itemName, ArrayList<string>  itemList,
>                               string separator = ", ")
> {
>         return itemList.is_empty ? "" :
>                @"<tr><td>$itemName</td><td>$(join(itemList, separator))</td></tr>\n";
> }
>
>
> A 'join' method is most efficiently implemented with a StringBuilder:
>
> string join(Iterable<string>  strings, string separator = ", ") {
>         var builder = new StringBuilder();
>         var it = strings.iterator();
>         for (var has_next = it.first(); has_next; has_next = it.next()) {
>                 builder.append(it.get());
>                 if (it.has_next()) {
>                         builder.append(separator);
>                 }
>         }
>         return builder.str;
> }
>
>
> Alternatively you could use 'string.joinv', but then you would have to convert
> your list into a null-terminated array first.
>
>
> Best regards,
>
> Frederik
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>    
Thanks.  I'll have to look for documentation on StringBuilder.