Every techie’s heart beats a little more quickly at the thought of a new electronic gizmo. In the case of a computer, however, this anticipation is muted by several dark thoughts.

First, the new computer isn’t really going to do anything different than the beloved old one, just the same things a little faster. And that modest increase in speed is going to come at an enormous cost in worry—and the work of switching over to the new machine. Fortunately, we don’t replace computers very often these days. Processor speeds have plateaued. We’ve improved performance through multiple processing cores, but so far we haven’t done much to use them. And how many cores do you need to run a word processor or a Web browser anyway?

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Why Functional Programming Should Be the Future of Software Development

It’s hard to learn, but your code will produce fewer nasty surprises

11 min read
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A plate of spaghetti made from code with a single strand of "spaghetti code" being pulled from the top of the frame in a neverending loop on a blue gradient background.
Shira Inbar
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You’d expectthe longest and most costly phase in the lifecycle of a software product to be the initial development of the system, when all those great features are first imagined and then created. In fact, the hardest part comes later, during the maintenance phase. That’s when programmers pay the price for the shortcuts they took during development.

So why did they take shortcuts? Maybe they didn’t realize that they were cutting any corners. Only when their code was deployed and exercised by a lot of users did its hidden flaws come to light. And maybe the developers were rushed. Time-to-market pressures would almost guarantee that their software will contain more bugs than it would otherwise.

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