viclafouch

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joepie91

A "prefix code" is a type of encoding mechanism ("code"). For something to be a prefix code, the entire set of possible encoded values ("codewords") must not contain any values that start with any other value in the set.

For example: [3, 11, 22] is a prefix code, because none of the values start with ("have a prefix of") any of the other values. However, [1, 12, 33] is not a prefix code, because one of the values (12) starts with another of the values (1).

Prefix codes are useful because, if you have a complete and accurate sequence of values, you can pick out each value without needing to know where one value starts and ends.

For example, let's say we have the following codewords: [1, 2, 33, 34, 50, 61]. And let's say that the sequence of numbers we've received looks like this:

1611333425012

chitchcock

Stevey's Google Platforms Rant

I was at Amazon for about six and a half years, and now I've been at Google for that long. One thing that struck me immediately about the two companies -- an impression that has been reinforced almost daily -- is that Amazon does everything wrong, and Google does everything right. Sure, it's a sweeping generalization, but a surprisingly accurate one. It's pretty crazy. There are probably a hundred or even two hundred different ways you can compare the two companies, and Google is superior in all but three of them, if I recall correctly. I actually did a spreadsheet at one point but Legal wouldn't let me show it to anyone, even though recruiting loved it.

I mean, just to give you a very brief taste: Amazon's recruiting process is fundamentally flawed by having teams hire for themselves, so their hiring bar is incredibly inconsistent across teams, despite various efforts they've made to level it out. And their operations are a mess; they don't real