Builds
AND gate and OR gate using transistors: build both
To make an AND gate using transistors (switches flipped by electricity), put two in a row. Current must pass through both, so an LED wired...
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Explains
Switch debouncing explained: why one press can count as 7
Switch debouncing turns one bouncy button press back into one count. A button's contacts are springy metal, so they hit, bounce apart...
System Design
Observer Pattern Explained With a Real Python Example
The observer pattern lets one object announce that something happened, and lets any number of other objects react to it. The announcer kee...
Code
Python list append time complexity: why it's amortized O(1)
Python's list.append is fast because a list is a dynamic array: one block of memory with spare slots. Most appends fill a spare slot. ...