Juerd

#!/usr/bin/perl -w
use strict;

@ARGV or die "Usage: $0 PNGFILE...\nOutputs the file names of the PNG files with trailing data.";

FILE: while (@ARGV) {
    my $fn = shift;
    eval {
        no warnings 'exiting';

prologic

Learn Go in ~5mins

This is inspired by A half-hour to learn Rust and Zig in 30 minutes.

Basics

Your first Go program as a classical "Hello World" is pretty simple:

First we create a workspace for our project:

roycewilliams

#------------------------------------------------------------------------------
# Top 20K hashes from the Troy Hunt / haveibeenpwned Pwned Passwords list v6 (2020-06-19)
#    with frequency count and cracked plaintext passwords
#
# The latest version of this file can be found here:
#    https://gist.github.com/roycewilliams/226886fd01572964e1431ac8afc999ce
# The equivalent of this file, but based on v2 of the Pwned Passwords, is here:
#    https://gist.github.com/roycewilliams/281ce539915a947a23db17137d91aeb7
#------------------------------------------------------------------------------
# Notes and references:

stvhwrd

Curated List of Top 75 LeetCode Questions to Save Your Time

A list of the best LeetCode questions that teach you core concepts and techniques for each category/type of problem. Many other LeetCode questions are a mashup of the techniques from these individual questions.

Array

• Two Sum
• Best Time to Buy and Sell Stock
• Contains Duplicate
• Product of Array Except Self

yassineaboukir

0
00
01
02
03
1
1.0
10
100
1000

andyrbell

# use ImageMagick convert
# the order is important. the density argument applies to input.pdf and resize and rotate to output.pdf
convert -density 90 input.pdf -rotate 0.5 -attenuate 0.2 +noise Multiplicative -colorspace Gray output.pdf

scrapehero

import pytesseract
import sys
import argparse
try:
    import Image
except ImportError:
    from PIL import Image
from subprocess import check_output

roycewilliams

------------------------------------------------------------------------------
You can drop the power on NVIDIA cards and improve performance per watt.

Credit for the idea to atom on the 1080s:

https://docs.google.com/spreadsheets/d/1B1S_t1Z0KsqByH3pNkYUM-RCFMu860nlfSsYEqOoqco/edit#gid=1307275979

On the GTX 970s, you can drop to 150 and still get 99.96% of the same 
performance! This saves power (and heat?). And there is evidence that the
performance difference varies per hash and per attack (masks, rules, etc.)

koenrh

Running Hashcat on Google Cloud's GPU-based VMs

In February 2017, Google announced the availability GPU-based VMs. I spun up a few of these instances, and ran some benchmarks. Along the way, I wrote down the steps taken to provision these VM instances, and install relevant drivers.

Update April 2019: Updated instructions to use instances with the Tesla T4 GPUs.

guylaor

Install python 3
create a virtualenv and then

pip install selenium

then install chrome driver:

brew install chromedriver

to test, run this script - notice the location of the chrome driver