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Converting timestamp to time ago in PHP e.g 1 day ago, 2 days ago…

I am trying to convert a timestamp of the format 2009-09-12 20:57:19 and turn it into something like 3 minutes ago with PHP. ...
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Explain the use of a bit vector for determining if all characters are unique

...ay be a little bit faster, because operations with bits are very low level and can be executed as-is by CPU. BitVector allows writing a little bit less cryptic code instead plus it can store more flags. For future reference: bit vector is also known as bitSet or bitArray. Here are some links to thi...
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Why does this Java program terminate despite that apparently it shouldn't (and didn't)?

...etely wrong. An actuator on an electron microscope went over its boundary, and after a chain of events I lost $12 million of equipment. I've narrowed down over 40K lines in the faulty module to this: ...
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Get a specific bit from byte

... Easy. Use a bitwise AND to compare your number with the value 2^bitNumber, which can be cheaply calculated by bit-shifting. //your black magic var bit = (b & (1 << bitNumber-1)) != 0; EDIT: To add a little more detail because there ...
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How can I multiply and divide using only bit shifting and adding?

How can I multiply and divide using only bit shifting and adding? 14 Answers 14 ...
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Why does Lua have no “continue” statement?

I have been dealing a lot with Lua in the past few months, and I really like most of the features but I'm still missing something among those: ...
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Difference between float and decimal data type

What difference does it make when I use float and decimal data types in MySQL?. 12 Answers ...
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Equation (expression) parser with precedence?

...'ve developed an equation parser using a simple stack algorithm that will handle binary (+, -, |, &, *, /, etc) operators, unary (!) operators, and parenthesis. ...
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What exactly is a C pointer if not a memory address?

... The C standard does not define what a pointer is internally and how it works internally. This is intentional so as not to limit the number of platforms, where C can be implemented as a compiled or interpreted language. A pointer val...
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TortoiseSVN icons not showing up under Windows 7

I can't seem to get the icons to display under Windows 7 and I really miss this from Windows XP. 31 Answers ...