This project is a tiny compiler for a very simple language consisting of boolean expression.
The language has two constants: 1 for true and 0 for false, and 4 logic gates:
! (not), & (and), | (or), and ^ (xor).
It can also use parentheses to manage priorities.
Here is its grammar in BNF format:
expr ::= "0" | "1"
| { | |
| "Statement": [ | |
| { | |
| "Action": [ | |
| "apigateway:*", | |
| "cloudformation:CancelUpdateStack", | |
| "cloudformation:ContinueUpdateRollback", | |
| "cloudformation:CreateChangeSet", | |
| "cloudformation:CreateStack", | |
| "cloudformation:CreateUploadBucket", |
| " cat | |
| lac 017777 i " Load accumulator (AC) with argument count | |
| sad d4 " Skip next if we have more than 4 words of args | |
| jmp nofiles " Otherwise, jump to nofiles | |
| lac 017777 " Load AC with address of args | |
| tad d1 " Increment AC by 1, past argument count | |
| tad d4 " Increment AC by 4, now AC points to first real arg | |
| dac name " Save arg pointer from AC into 'name' |
| I have three file in my directory named 'flask' : | |
| ➜ flask | |
| ── app.py | |
| ── Dockerfile | |
| ── requirement.txt | |
| #---------------------------------------------- | |
| $ cat app.py |
| // check version | |
| node -v || node --version | |
| // list locally installed versions of node | |
| nvm ls | |
| // list remove available versions of node | |
| nvm ls-remote | |
| // install specific version of node |
FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.
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Note: I'm currently taking a break from this course to focus on my studies so I can finally graduate
| import sys | |
| from urllib import urlencode | |
| import requests | |
| from urlparse import urlparse, parse_qs | |
| from random import choice | |
| import re | |
| self_id = None # your facebook id here | |
| utc_bday = None # utc timestamp of your birthday |
