zfael

var fs = require('fs');
var crypto = require('crypto');

fs.readFile('file.pdf', function(err, data) {
  var checksum = generateChecksum(data);
  console.log(checksum);
});

function generateChecksum(str, algorithm, encoding) {
    return crypto

zfael

//how to execute: node sign.js <path file> <path private key>
//output: signature of file
var crypto = require('crypto');
var fs = require('fs');

var args = process.argv.slice(2);
var fileName = args[0];
var keyPath = args[1];

//openssl genrsa -out key.pem 1024

zfael

//how to execute: node verify.js <path file that you want to verify> <certificate path> <hash generate by sign.js>
//output: true if files are equal, false otherwise.
var crypto = require('crypto');
var fs = require('fs');

var args = process.argv.slice(2);
var fileName = args[0];
var certPath = args[1];
var sig = args[2];

zfael

To keep the changes from the commit you want to undo

$ git reset --soft HEAD^

To destroy the changes from the commit you want to undo

$ git reset --hard HEAD^

You can also say

zfael

# Find last commit for the deleted file
git rev-list -n 1 HEAD -- $path

# Checkout the commit before the the delete happened
git checkout $commit^ -- $path

zfael

# To use this, add .nvmrc with contents of 'N.N.N'  to your project. e.g. 0.12.7
# Add the following to the end of .bash_profile or .bashrc
#
# if directory is changed 
#   if `.nvmrc` is found execute `nvm use`
#   if `package.json` is round execute `nvm use default`
enter_directory() {
  if [ "$PWD" != "$PREV_PWD" ]; then
    PREV_PWD="$PWD";
    if [ -e ".nvmrc" ]; then

zfael

"If you know the contents of the line, this is an ideal use case for:
git log -S <string> path/to/file "

Reference > https://stackoverflow.com/questions/4404444/how-do-i-git-blame-a-deleted-line

zfael

# rm all files
git rm -r --cached .
# add all files as per new .gitignore
git add .
# now, commit for new .gitignore to apply
git commit -m ".gitignore is now working"

Ref> https://stackoverflow.com/questions/7075923/resync-git-repo-with-new-gitignore-file

zfael

# Usage
# 1 - add below snippet on your bashrc/zshrc
# 2 - call it by "killport 4000"
# 3 - profit

killport() {
  port=$(lsof -n -i4TCP:$1 | grep LISTEN | awk '{ print $2 }')
  kill -9 $port
}

zfael

/**
 * Usage
 * - npm install loadtest
 * - npx ts-node load-test.ts
 */

import loadtest from 'loadtest';

const method = 'GET';