Skip to content

Instantly share code, notes, and snippets.

@bhouse
bhouse / centos_nspawn.md
Created February 8, 2016 23:41
Centos 7.2.1511 via systemd-nspawn

Make a directory to install CentOS 7.2.1511 in

[root@localhost ~]# mkdir /centos_chroot

Make a directory for the rpm database

[root@localhost ~]# mkdir -p /centos_chroot/var/lib/rpm

Create the RPM database

@dagingaa
dagingaa / prototype-to-class.js
Last active December 23, 2022 11:38
Codemod to transform well-written function prototype style classes into the new ES2015 syntax. Requires jscodeshift.
module.exports = (file, api, options) => {
const j = api.jscodeshift;
const root = j(file.source);
// We have to add "use strict" for node to play nice
// Taken from https://github.com/cpojer/js-codemod/blob/master/transforms/use-strict.js
const hasStrictMode = body =>
body.some(
statement => j.match(statement, {
type: 'ExpressionStatement',
@developit
developit / Rollup Automatic External Dependencies.md
Last active June 29, 2021 15:33
Rollup Automatic External Dependencies

Hi!

This is an example of how to use [Rollup] with external dependencies, without hard-coding them.

It reads your installed NPM dependencies and treats them as external to Rollup. They still get bundled, but not as ES2015.

Make sure you have a .babelrc or a "babel":{} section in your package.json.

@gregelin
gregelin / SCAP-CentOS-NotApplicable.md
Last active February 22, 2022 21:50
Explanation of SCAP, CentOS and tests Not Applicable

This note explains the common issue of "notapplicable" results when running openSCAP and SCAP-Security-Guide on CentOS.

SCAP seems like it should be easy because it is "just XML". Then you dig into looking for a test and it gets confusing fast. So it is good to have some background.

SCAP (Security Content Automation Protocol) is actually a set of multiple standards and specifications that are used together to enable automatically testing hundreds of nerd settings. Let me emphasize that: SCAP is not a single XML specification -- SCAP is multiple standards and specs. Whenever you give "SCAP Content" to a scanner to check a system configurations you are giving the scanner multiple XML files representing multiple standards.

@yorammi
yorammi / 2repos-sync.sh
Last active January 11, 2024 07:25
Sync 2 remote repositories script - Just define the 3 variables (use export command for that!)
#!/bin/bash
# REPO_NAME=<repo>.git
# ORIGIN_URL=git@<host>:<project>/$REPO_NAME
# REPO1_URL=git@<host>:<project>/$REPO_NAME
rm -rf $REPO_NAME
git clone --bare $ORIGIN_URL
if [ "$?" != "0" ]; then
echo "ERROR: failed clone of $ORIGIN_URL"
@schtobia
schtobia / tschroot
Last active October 15, 2024 06:44
Mount /tmp, /dev/pts, /dev/shm and /proc into chroot and change into chroot
#! /bin/sh
[ ! -d "$1" ] && echo "$1 is not a valid directory." && exit 1;
trap "umount \"${1}\"/tmp \"${1}\"/dev/null \"${1}\"/dev/pts \"${1}\"/dev/random \"${1}\"/dev/shm \"${1}\"/dev/urandom \"${1}\"/proc" EXIT INT TERM HUP PIPE &&
mount --bind /tmp "${1}/tmp" && \
mount --bind /dev/null "${1}/dev/null" && \
mount --bind /dev/pts "${1}/dev/pts" && \
mount --bind /dev/random "${1}/dev/random" && \
mount --bind /dev/shm "${1}/dev/shm" && \
mount --bind /dev/urandom "${1}/dev/urandom" && \
mount --bind /proc "${1}/proc" && \
@kdzwinel
kdzwinel / main.js
Last active January 16, 2025 20:26
List all undefined CSS classes
/*
This script attempts to identify all CSS classes mentioned in HTML but not defined in the stylesheets.
In order to use it, just run it in the DevTools console (or add it to DevTools Snippets and run it from there).
Note that this script requires browser to support `fetch` and some ES6 features (fat arrow, Promises, Array.from, Set). You can transpile it to ES5 here: https://babeljs.io/repl/ .
Known limitations:
- it won't be able to take into account some external stylesheets (if CORS isn't set up)
- it will produce false negatives for classes that are mentioned in the comments.
@SudoPlz
SudoPlz / commentRemover.js
Last active December 15, 2023 07:08
A messy little js file that removes comments from any string passed into `stripComments(str)` function.
exports.stripComments = function stripComments(toBeStrippedStr){
//LEXER
function Lexer () {
this.setIndex = false;
this.useNew = false;
for (var i = 0; i < arguments.length; ++i) {
var arg = arguments [i];
if (arg === Lexer.USE_NEW) {
this.useNew = true;
}
@paulirish
paulirish / what-forces-layout.md
Last active April 30, 2025 13:27
What forces layout/reflow. The comprehensive list.

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics
  • elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent
@ebidel
ebidel / object-observe-proxy-polyfill.js
Last active July 29, 2021 04:08
Object.observe() polyfill using ES6 Proxies (POC)
// An `Object.observe()` "polyfill" using ES6 Proxies.
//
// Current `Object.observe()` polyfills [1] rely on polling
// to watch for property changes. Proxies can do one better by
// observing property changes to an object without the need for
// polling.
//
// Known limitations of this technique:
// 1. the call signature of `Object.observe()` will return the proxy
// object. The original object needs to be overwritten with this return value.