Re^5: Global substitution of non-base-plane Unicode characters

If "the value of $\ is later changed" was a genuine concern, a better way would be to explicitly code the following rather than expecting a subsequent maintainer to automatically realise why printf was used here:

...
{
    local $\;
    print "\x{FEFF}";
}
...
[download]

And, of course, a much better way to change $\ in the middle of the program, would be along these lines:

... code as it is now ...
# later changes:
...
{
    local $\ = "\n";
    ... code using changed $\ ...
}
...
[download]

-- Ken

Comment on Re^5: Global substitution of non-base-plane Unicode characters Select or Download Code

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Re^6: Global substitution of non-base-plane Unicode characters by pjfarley3 (Initiate) on Feb 24, 2014 at 04:44 UTC
I like your solution making the printing of the BOM a local block better than my use of printf, thank you. I will use that. Peter	[reply]
Re^6: Global substitution of non-base-plane Unicode characters by Jim (Curate) on Feb 24, 2014 at 17:43 UTC
TIMTOWTDI. In Perl, printing exactly one character—a Unicode byte order mark—and nothing else is a special case of formatted printing, vis-à-vis generalized printing of lines of text with built-in programming conveniences (e.g., automatic newline handling). Would you find this troublesome? `printf '%s', "\N{U+FEFF}";` [download] Or this? `printf '%c', 0xfeff;` [download] Jim	[reply] [d/l] [select]
Re^7: Global substitution of non-base-plane Unicode characters by kcott (Archbishop) on Feb 25, 2014 at 00:30 UTC
This really has nothing to do with what, if anything, I find "troublesome". You hit the nail on the head with your earlier post: "Using `printf` in this admittedly unusual way ...". Writing code in an unusual way (without any indication of why this was done) makes future maintenance error-prone. Yes, there's more than one way to do it. Here's another, that simply adds a comment, that I would consider better: `printf "\x{FEFF}"; # printf() so $\ is not appended` [download] -- Ken	[reply] [d/l] [select]