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Re: Single vs. Double Quotes


From: Ben Abbott
Subject: Re: Single vs. Double Quotes
Date: Sun, 16 Oct 2011 11:53:13 -0400

On Oct 15, 2011, at 5:07 PM, John W. Eaton wrote:

> On 15-Oct-2011, Michael Goffioul wrote:
> 
> | On Sat, Oct 15, 2011 at 7:08 PM, John W. Eaton <address@hidden> wrote:
> | > On 15-Oct-2011, Michael Goffioul wrote:
> | >
> | > | way.This is could be achieved as easily as:
> | > |
> | > | strrep (delimiter_string, '\n', "\n")
> | >
> | > I'm not sure, but I don't think it is quite this simple.  WDMD if the
> | > delimiter string is set to '\\n'?  Is this recognized as a
> | > two-character sequence backslash and n, or is it backslash and NL?
> | >
> | > In *printf, I think it is backslash and n, so it would be unfortunate
> | > if the delimiter string in strread did something different.
> | 
> | You're right, this was just a quick hack I considered, but far from a
> | good solution. Your other solution is better. I also thought about
> | that, but was afraid of other side-effects due to the use of sprintf.
> | Doubling % characters should prevent them.
> 
> Another possibility is do_string_escapes.  It should still be applied
> only to single-quoted strings in strread, but it saves you the step of
> doubling the % characters and it only does backslash-style escape
> processing, so it might be faster than sprintf.
> 
> jwe


Is there a robust way to determine whether a string is single-quoted or 
double-quoted?

Ben



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