systems

Linux

`grep` uses Boyer-Moore-Horspool to skip most input without reading it character by character

Linux

`cd` is a shell builtin, not a program: it cannot exist as a separate process

C

`volatile` tells the compiler a variable can change outside of program control

C

A `static` local variable in C keeps its value between function calls

Culture

A Ga proverb: small streams that join together become a powerful river

Article

What Every Programmer Should Know About Memory

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