On Sunday, 16 March 2014 00:47:45 UTC-4, Brandon wrote:
>
> So I have the following:
>
> flash[:success] = 'Your payment has completed. Please contact ' +
> @order.seller.name + ' (mobile: ' +
> @order.seller.mobile_number + ', email: ' +
> @order.seller.email + ')'
>
> Strangely inside this method, I can't seem to do string interpolation and
> it prints '@order.seller.name'. So that is a strange issue.
>
>
String interpolation only works with double (") not single (') quotes.
> But the main thing that puzzles me is should I be replacing + with <<
> here? I read somewhere the performance is better but I really hate seeing
> << in my code. It just seems ugly and raises my blood pressure for some
> reason.
>
If you're concatenating a LOT of strings, << is definitely preferable - a +
b + c + d generates three intermediate String objects which need to be
GCed, while a << b << c << d doesn't.
--Matt Jones
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