Aaaand… Thomas F. contributed a spiffy JavaScript for detecting CC
types and validating against the Luhn10 algorithm.
This little guide is based on what we learned developing our new time
tracking service, freckle: http://letsfreckle.com. Even with the help of
some excellent existing libraries, the whole process was brutal!
I hate being brutalized! And there is crap all for resouces out there on
this topic, so I figured I’d share the knowledge.
Hi Amy,
Without having looked at your cheat sheet yet, nor at any code that
might be
out there for validating credit card numbers, can I put in a request to
eliminate one of my (many, I’m sure) pet peeves…
Did/can you address the issue of allowing the end user to put spaces in
credit card numbers?
I find it much easier to enter 4 digits at a time, as they are printed
on my
credit card, separated by spaces and get annoyed at sites that require
that
I enter all 16 digits in one swell foop.
Anybody else with ideas, suggestions, or questions… let 'er rip!
Oh, and if it helped you, I wouldn’t mind hearing that either
Cheers,
Amy
What did you use to type the mini-book? It looks fantastic and is much
easier to read than a boring manual! Is it LateX? OpenOffice? M$ Word?
Other.
Where did you get all these cool little images? Do you crate them
yourself or do you have a pool of images in which you can pick?
We’re working on a ~60-page ebook on JavaScript performance and scaling,
specifically, that I hope to publish in February, for $29 (including
some awesome tools we’ll also OSS later).
Sign up for the email list on jumpstartcc.com and I’ll send you an early
adopter discount
Matt, I don’t know if you’re familiar with my older cheat sheets.
They’re not this big, but clearly I’ve been working up to it:
For the record, I do these up in Omnigraffle, although I’m about to
ditch that in favor of either Keynote (unlikely) or InDesign (likely)
for any future 10-pagers. I am an OG ninja, though, so I don’t think I’d
recommend the tool to anyone else.
Where did you get all these cool little images? Do you crate them yourself or do you have a pool of images in which you can pick?
The illustrations are from istockphoto.com. I probably dropped about
$100-$120 on stock art for this baby. I do not like to do a half-assed
job.
… I don’t know if you’re familiar with my older cheat sheets.
Amy, thanks for those links, but looking at one also reminded me –
Major props for creating the CC guide with an aspect ratio that makes
sense for reading online.
One of the main reasons I generally despise PDF is having to scroll
up and down to read something formatted for an vertically oriented
8.5x11"/A4 printed page rather than a typical wider-than-tall screen.
