Subj : console.strlen(text) vs. strip_ctrl(text).length
To : Nightfox
From : Digital Man
Date : Sun Jan 04 2015 07:20 pm
Re: console.strlen(text) vs. strip_ctrl(text).length
By: Nightfox to Digital Man on Sun Jan 04 2015 09:39 am
> Hi DM,
>
> While working on one of my scripts, there are some places where I need to
> get the length of a string as it will appear on the screen. It seems there
> are two ways to do so - console.strlen(text) and strip_ctrl(text).length.
> While working on one of my JS scripts, I noticed I'm getting two different
> results from each of those ways of getting string length for one of my
> script's strings. Specifically, my string has a 4 special characters to
> represent arrows, which are counted by console.strlen(), but those special
> arrow characters seem to be removed by strip_ctrl(). The following image
> shows the text line output from my script with the 4 arrow characters (it's
> a help line showing some valid key commands):
>
http://home.comcast.net/~nightfox/BBSStuff/helpLine.png
>
> The length returned by console.strlen() is 79, whereas the length returned
> by strip_ctrl(text).length is 75.
>
> The documentation says console.strlen() will exclude Ctrl-A codes, while
> strip_ctrl() removes control characters. It sounds like strip_ctrl() might
> be removing all control characters (not just Ctrl-A characters), is that
> correct? I was curious if what I'm seeing is the expected behavior.
Yes, strip_ctrl() removes all control characters (ASCII value less than 32) and
all Ctrl-A code sequences.
What's the ASCII value of these "4 special characters to represent arrows"?
digital man
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