WHAT IS
CODE?|
A message from Josh Tyrangiel
1
The Man in the Taupe Blazer
You are an educated, successful person capable of abstract thought. A VP doing an SVP’s job. Your office, appointed with decent furniture and a healthy amount of natural light filtered through vertical blinds, is commensurate with nearly two decades of service to the craft of management.
Copper plaques on the wall attest to your various leadership abilities inside and outside the organization: One, the Partner in Innovation Banquet Award 2011, is from the sales team for your support of its 18-month effort to reduce cycle friction—net sales increased 6.5 percent; another, the Civic Guidelight 2008, is for overseeing a volunteer team that repainted a troubled public school top to bottom.
You have a reputation throughout the organization as a careful person, bordering on penny-pinching. The way you’d put it is, you are loath to pay for things that can’t be explained. You expect your staff to speak in plain language. This policy has served you well in many facets of operations, but it hasn’t worked at all when it comes to overseeing software development.
For your entire working memory, some Internet thing has come along every two years and suddenly hundreds of thousands of dollars (inevitably millions) must be poured into amorphous projects with variable deadlines. Content management projects, customer relationship management integration projects, mobile apps, paperless office things, global enterprise resource planning initiatives—no matter how tightly you clutch the purse strings, software finds a way to pry open your fingers.
Here we go again. On the other side of your (well-organized) desk sits this guy in his mid-30s with a computer in his lap. He’s wearing a taupe blazer. He’s come to discuss spending large sums to create intangible abstractions on a “website re-architecture project.” He needs money, support for his team, new hires, external resources. It’s preordained that you’ll give these things to him, because the CEO signed off on the initiative—and yet should it all go pear-shaped, you will be responsible. Coders are insanely expensive, and projects that start with uncomfortably large budgets have an ugly tendency to grow from there. You need to understand where the hours will go.
PHOTOGRAPH BY COREY OLSEN FOR BLOOMBERG BUSINESSWEEK
He says: “We’re basically at the limits with WordPress.”
Who wears a taupe blazer?
The CTO was fired six months ago. That CTO has three kids in college and a mustache. It was a bad exit. The man in the taupe blazer (TMitTB) works for the new CTO. She comes from Adobe and has short hair and no mustache.
Here is what you’ve been told: All of the computer code that keeps the website running must be replaced. At one time, it was very valuable and was keeping the company running, but the new CTO thinks it’s garbage. She tells you the old code is spaghetti and your systems are straining as a result. That the third-party services you use, and pay for monthly, are old and busted. Your competitor has an animated shopping cart that drives across the top of the screen at checkout. That cart remembers everything customers have ever purchased and generates invoices on demand. Your cart has no memory at all.
Salespeople stomp around your office, sighing like theater students, telling you how embarrassed they are by the site. Nothing works right on mobile. Orders are cutting off halfway. People are logged out with no warning. Something must be done.
Which is why TMitTB is here.
Who’s he, anyway? Webmaster? IT? No, he’s a “Scrum Master.”
“My people are split on platform,” he continues. “Some want to use Drupal 7 and make it work with Magento—which is still PHP.” He frowns. “The other option is just doing the back end in Node.js with Backbone in front.”
You’ve furrowed your brow; he eyes you sympathetically and explains: “With that option it’s all JavaScript, front and back.”
Those are all terms you’ve heard. You’ve read the first parts of the Wikipedia pages and a book on software project estimation. It made some sense at the time.
You ask the universal framing question: “Did you cost these options?”
He gives you a number and a date. You know in your soul that the number is half of what it should be and that the project will go a year over schedule. He promises long-term efficiencies: The $85,000 in Oracle licenses will no longer be needed; engineering is moving to a free, open-sourced database. “We probably should have done that back when we did the Magento migration,” he says. Meaning, of course, that his predecessor probably should have done that.
You consult a spreadsheet and remind him that the Oracle contract was renewed a few months ago. So, no, actually, at least for now, you’ll keep eating that cost. Sigh.
This man makes a third less than you, and his education ended with a B.S. from a large, perfectly fine state university. But he has 500+ connections on LinkedIn. That plus sign after the “500” bothers you. How many more than 500 people does he know? Five? Five thousand?
In some mysterious way, he outranks you. Not within the company, not in restaurant reservations, not around lawyers. Still: He strokes his short beard; his hands are tanned; he hikes; his socks are embroidered with little ninja.
“Don’t forget,” he says, “we’ve got to budget for apps.”
This is real. A Scrum Master in ninja socks has come into your office and said, “We’ve got to budget for apps.” Should it all go pear-shaped, his career will be just fine.
You keep your work in perspective by thinking about barrels of cash. You once heard that a U.S. dry barrel can hold about $100,000 worth of singles. Next year, you’ll burn a little under a barrel of cash on Oracle. One barrel isn’t that bad. But it’s never one barrel. Is this a 5-barrel project or a 10-barreler? More? Too soon to tell. But you can definitely smell money burning.
At this stage in the meeting, you like to look supplicants in the eye and say, OK, you’ve given me a date and a budget. But when will it be done? Really, truly, top-line-revenue-reporting finished? Come to confession; unburden your soul.
This time you stop yourself. You don’t want your inquiry to be met by a patronizing sigh of impatience or another explanation about ship dates, Agile cycles, and continuous delivery. Better for now to hide your ignorance. When will it be done? You are learning to accept that the answer for software projects is never.
1.1 Why Are We Here?
We are here because the editor of this magazine asked me, “Can you tell me what code is?”
“No,” I said. “First of all, I’m not good at the math. I’m a programmer, yes, but I’m an East Coast programmer, not one of these serious platform people from the Bay Area.”
I began to program nearly 20 years ago, learning via
oraperl, a special version of the Perl language modified to work with the Oracle database. A month into the work, I damaged the accounts of 30,000 fantasy basketball players. They sent some angry e-mails. After that, I decided to get better.
Which is to say I’m not a natural. I love computers, but they never made any sense to me. And yet, after two decades of jamming information into my code-resistant brain, I’ve amassed enough knowledge that the computer has revealed itself. Its magic has been stripped away. I can talk to someone who used to work at Amazon.com or Microsoft about his or her work without feeling a burning shame. I’d happily talk to people from Google and Apple, too, but they so rarely reenter the general population.
The World Wide Web is what I know best (I’ve coded for money in the programming languages Java, JavaScript, Python, Perl, PHP, Clojure, and XSLT), but the Web is only one small part of the larger world of software development. There are 11 million professional software developers on earth, according to the research firm IDC. (An additional 7 million are hobbyists.) That’s roughly the population of the greater Los Angeles metro area. Imagine all of L.A. programming. East Hollywood would be for Mac programmers, West L.A. for mobile, Beverly Hills for finance programmers, and all of Orange County for Windows.
There are lots of other neighborhoods, too: There are people who write code for embedded computers smaller than your thumb. There are people who write the code that runs your TV. There are programmers for everything. They have different cultures, different tribal folklores, that they use to organize their working life. If you told me a systems administrator was taking a juggling class, that would make sense, and I’d expect a product manager to take a trapeze class. I’ve met information architects who list and rank their friendships in spreadsheets. Security research specialists love to party.
What I’m saying is, I’m one of 18 million. So that’s what I’m writing: my view of software development, as an individual among millions. Code has been my life, and it has been your life, too. It is time to understand how it all works.
Every month it becomes easier to do things that have never been done before, to create new kinds of chaos and find new kinds of order. Even though my math skills will never catch up, I love the work. Every month, code changes the world in some
interesting,
wonderful,
or disturbing way.
2
Let’s Begin
A computer is a clock with benefits. They all work the same, doing second-grade math, one step at a time: Tick, take a number and put it in box one. Tick, take another number, put it in box two. Tick, operate (an operation might be addition or subtraction) on those two numbers and put the resulting number in box one. Tick, check if the result is zero, and if it is, go to some other box and follow a new set of instructions.
You, using a pen and paper, can do anything a computer can; you just can’t do those things billions of times per second. And those billions of tiny operations add up. They can cause a phone to boop, elevate an elevator, or redirect a missile. That raw speed makes it possible to pull off not one but multiple sleights of hand, card tricks on top of card tricks. Take a bunch of pulses of light reflected from an optical disc, apply some math to unsqueeze them, and copy the resulting pile of expanded impulses into some memory cells—then read from those cells to paint light on the screen. Millions of pulses, 60 times a second. That’s how you make the rubes believe they’re watching a movie.
Apple has always made computers; Microsoft used to make only software (and occasional accessory hardware, such as mice and keyboards), but now it’s in the hardware business, with Xbox game consoles, Surface tablets, and Lumia phones. Facebook assembles its own computers for its massive data centers.
So many things are computers, or will be. That includes watches, cameras, air conditioners, cash registers, toilets, toys, airplanes, and movie projectors. Samsung makes computers that look like TVs, and Tesla makes computers with wheels and engines. Some things that aren’t yet computers—dental floss, flashlights—will fall eventually.
When you “batch” process a thousand images in Photoshop or sum numbers in Excel, you’re programming, at least a little. When you use computers too much—which is to say a typical amount—they start to change you. I’ve had Photoshop dreams, Visio dreams, spreadsheet dreams, and Web browser dreams. The dreamscape becomes fluid and can be sorted and restructured. I’ve had programming dreams where I move text around the screen.
You can make computers do wonderful things, but you need to understand their limits. They’re not all-powerful, not conscious in the least. They’re fast, but some parts—the processor, the RAM—are faster than others—like the hard drive or the network connection. Making them seem infinite takes a great deal of work from a lot of programmers and a lot of marketers.
The turn-of-last-century British artist William Morris once said you can’t have art without resistance in the materials. The computer and its multifarious peripherals are the materials. The code is the art.
2.1 How Do You Type an “A”?
Consider what happens when you strike a key on your keyboard. Say a lowercase “a.” The keyboard is waiting for you to press a key, or release one; it’s constantly scanning to see what keys are pressed down. Hitting the key sends a scancode.
ESC
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10
F11
F12
`
1
2
3
4
5
6
7
8
9
0
-
=
BKSP
TAB
Q
W
E
R
T
Y
U
I
O
P
[
]
\
CAPS
A
S
D
F
G
H
J
K
L
;
'
ENTER
L SHFT
Z
X
C
V
B
N
M
,
.
/
R SHFT
L CTRL
L ALT
SPACE
R ALT
↑
↓
←
→
Just as the keyboard is waiting for a key to be pressed, the computer is waiting for a signal from the keyboard. When one comes down the pike, the computer interprets it and passes it farther into its own interior. “Here’s what the keyboard just received—do with this what you will.”
It’s simple now, right? The computer just goes to some table, figures out that the signal corresponds to the letter “a,” and puts it on screen. Of course not—too easy. Computers are machines. They don’t know what a screen or an “a” are. To put the “a” on the screen, your computer has to pull the image of the “a” out of its memory as part of a font, an “a” made up of lines and circles. It has to take these lines and circles and render them in a little box of pixels in the part of its memory that manages the screen. So far we have at least three representations of one letter: the signal from the keyboard; the version in memory; and the lines-and-circles version sketched on the screen. We haven’t even considered how to store it, or what happens to the letters to the left and the right when you insert an “a” in the middle of a sentence. Or what “lines and circles” mean when reduced to binary data. There are surprisingly many ways to represent a simple “a.” It’s amazing any of it works at all.
Coders are people who are willing to work backward to that key press. It takes a certain temperament to page through standards documents, manuals, and documentation and read things like “data fields are transmitted least significant bit first” in the interest of understanding why, when you expected “ü,” you keep getting “�.”
2.2 From Hardware to Software
Hardware is a tricky business. For decades the work of integrating, building, and shipping computers was a way to build fortunes. But margins tightened. Look at Dell, now back in private hands, or Gateway, acquired by Acer. Dell and Gateway, two world-beating companies, stayed out of software, typically building PCs that came preinstalled with Microsoft Windows—plus various subscription-based services to increase profits.
This led to much cursing from individuals who’d spent $1,000 or more on a computer and now had to figure out how to stop the antivirus software from nagging them to pay up.
Ballmer chants “Developers!”
SOURCE: YOUTUBE
Years ago, when Microsoft was king, Steve Ballmer, sweating through his blue button-down, jumped up and down in front of a stadium full of people and chanted, “Developers! Developers! Developers! Developers!”
He yelled until he was hoarse: “I love this company!” Of course he did. If you can sell the software, if you can light up the screen, you’re selling infinitely reproducible nothings. The margins on nothing are great—until other people start selling even cheaper nothings or giving them away. Which is what happened, as free software-based systems such as Linux began to nibble, then devour, the server market, and free-to-use Web-based applications such as Google Apps began to serve as viable replacements for desktop software.
Expectations around software have changed over time. IBM unbundled software from hardware in the 1960s and got to charge more; Microsoft rebundled Internet Explorer with Windows in 1998 and got sued; Apple initially refused anyone else the ability to write software for the iPhone when it came out in 2007, and then opened the App Store, which expanded into a vast commercial territory—and soon the world had Angry Birds. Today, much hardware comes with some software—a PC comes with an operating system, for example, and that OS includes hundreds of subprograms, from mail apps to solitaire. Then you download or buy more.
There have been countless attempts to make software easier to write, promising that you could code in plain English, or manipulate a set of icons, or make a list of rules—software development so simple that a bright senior executive or an average child could do it. Decades of efforts have gone into helping civilians write code as they might use a calculator or write an e-mail. Nothing yet has done away with developers, developers, developers, developers.
Thus a craft, and a professional class that lives that craft, emerged. Beginning in the 1950s, but catching fire in the 1980s, a proportionally small number of people became adept at inventing ways to satisfy basic human desires (know the time, schedule a flight, send a letter, kill a zombie) by controlling the machine. Coders, starting with concepts such as “signals from a keyboard” and “numbers in memory,” created infinitely reproducible units of digital execution that we call software, hoping to meet the needs of the marketplace. Man, did they. The systems they built are used to manage the global economic infrastructure.
If coders don’t run the world, they run the things that run the world.
Most programmers aren’t working on building a widely recognized application like Microsoft Word. Software is everywhere. It’s gone from a craft of fragile, built-from-scratch custom projects to an industry of standardized parts, where coders absorb and improve upon the labors of their forebears (even if those forebears are one cubicle over). Software is there when you switch channels and your cable box shows you what else is on. You get money from an ATM—software. An elevator takes you up five stories—the same. Facebook releases software every day to something like a billion people, and that software runs inside Web browsers and mobile applications. Facebook looks like it’s just pictures of your mom’s crocuses or your son’s school play—but no, it’s software.
BORU O’BRIEN O’CONNELL FOR BLOOMBERG BUSINESSWEEK; SET DESIGN: DAVE BRYANT
2.3 How Does Code Become Software?
We know that a computer is a clock with benefits, and that software starts as code, but how?
We know that someone, somehow, enters a program into the computer and the program is made of code. In the old days, that meant putting holes in punch cards. Then you’d put the cards into a box and give them to an operator who would load them, and the computer would flip through the cards, identify where the holes were, and update parts of its memory, and then it would—OK, that’s a little too far back. Let’s talk about modern typing-into-a-keyboard code. It might look like this:
ispal: {x~|x}
That’s in a language called, simply, K, famous for its brevity.
That code will test if something is a palindrome. If you next typed in ispal "able was i ere i saw elba", K will confirm that yes, this is a palindrome.
So how else might your code look? Maybe like so, in Excel (with all the formulas hidden away under the numbers they produce, and a check box that you can check):
But Excel spreadsheets are tricky, because they can hide all kinds of things under their numbers. This opacity causes risks. One study by a researcher at the University of Hawaii found that 88 percent of spreadsheets contain errors.
Programming can also look like Scratch, a language for kids:
That’s definitely programming right there—the computer is waiting for a click, for some input, just as it waits for you to type an “a,” and then it’s doing something repetitive, and it involves hilarious animals.
Or maybe:
PRINT *, "WHY WON'T IT WORK
END
That’s in Fortran. The reason it’s not working is that you forgot to put a quotation mark at the end of the first line. Try a little harder, thanks.
All of these things are coding of one kind or another, but the last bit is what most programmers would readily identify as code. A sequence of symbols (using typical keyboard characters, saved to a file of some kind) that someone typed in, or copied, or pasted from elsewhere. That doesn’t mean the other kinds of coding aren’t valid or won’t help you achieve your goals. Coding is a broad human activity, like sport, or writing. When software developers think of coding, most of them are thinking about lines of code in files. They’re handed a problem, think about the problem, write code that will solve the problem, and then expect the computer to turn word into deed.
Code is inert. How do you make it ert? You run software that transforms it into machine language. The word “language” is a little ambitious here, given that you can make a computing device with wood and marbles. Your goal is to turn your code into an explicit list of instructions that can be carried out by interconnected logic gates, thus turning your code into something that can be executed—software.
A compiler is software that takes the symbols you typed into a file and transforms them into lower-level instructions. Imagine a programming language called Business Operating Language United System, or Bolus. It’s a terrible language that will have to suffice for a few awkward paragraphs. It has one real command,
PRINT. We want it to print HELLO NERDS on our screen. To that end, we write a line of code in a text file that says:PRINT {HELLO NERDS}
And we save that as
nerds.bol. Now we run gnubolus nerds.bol, our imaginary compiler program. How does it start? The only way it can: by doing lexical analysis, going character by character, starting with the “p,” grouping characters into tokens, saving them into our one-dimensional tree boxes. Let’s be the computer.| Character | Meaning |
|---|---|
| P | Hmmmm...? |
| R | Someone say something? |
| I | I’m waiting... |
| N | [drums fingers] |
| T | Any time now... |
| Space | Ah, "PRINT" |
| { | String coming! |
| H | These |
| E | letters |
| L | don’t |
| L | matter |
| O | la |
| Space | la |
| N | just |
| E | saving |
| R | them |
| D | for |
| S | later |
| } | Stringtime is over! |
| End of file | Time to get to work. |
The reason I’m showing it to you is so you can see how every character matters. Computers usually “understand” things by going character by character, bit by bit, transformin
http://www.bloomberg.com/graphics/2015-paul-ford-what-is-code/
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