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Tasks involving writing interpreters for various languages or formalisms.
28
votes
Self-Interpreting Interpreter
Binary Lambda Calculus, 232 bits (29 bytes)
01010001101000000001010110000000000111100001011111100111100001011100111100000011110000101101101110011111000011111000010111101001110100101100111000011011000 …
30
votes
Interpret brainfuck
Save the above hex dump with xxd -r > bf.Blc
Grab a blc interpreter from https://tromp.github.io/cl/cl.html
cc -O2 -DM=0x100000 -m32 -std=c99 uni.c -o uni
echo -n "++++++++++[>+++++++>++++++++++>+++> …
27
votes
Write an interpreter for the untyped lambda calculus
Example: computing 2^3 in Church numerals
Save the above hex dump with xxd -r > symbolic.Blc
Grab a blc interpreter from http://tromp.github.io/cl/uni.c
cc -O2 -DM=0x100000 -m32 -std=c99 uni.c -o uni
echo …