Re: Had an interview

On Fri, 02 May 2008 11:23:13 -0700, Andrey Tarasevich
<andreytarasevich@xxxxxxxxxxx> wrote:

andrew.nesterov@xxxxxxxxxxxx wrote:
...
Once I've read a following joke in a programming errs and traps book:

Implement a block that inputs either 1 or 2 and outputs the opposite:
1 -> 2, 2 -> 1
The author continue with three hypotetical solutions:
1. A programming class instructor:
if ( x == 1) x = 2;
if ( x == 2) x = 1;

I don't know why you call it "solution", since it's obviously incorrect.

2. A programmer:
if ( x == 1) x = 2;
else if ( x == 2) x = 1;

That would be a beginner/inexperienced programmer.

A "programmer" would most likely opt for the '?:' operator in this case.

3. A mathematitian:
x = 3 - x;

In reality that would the solution for a _good_ programmer.

x^=3; // explain wtf this is doing right here
Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@xxxxxxxxxxxx Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
.

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