martinhj

Greedy quantifier	Lazy quantifier	Description
*	*?	Star Quantifier: 0 or more
+	+?	Plus Quantifier: 1 or more
?	??	Optional Quantifier: 0 or 1
{n}	{n}?	Quantifier: exactly n
{n,}	{n,}?	Quantifier: n or more
{n,m}	{n,m}?	Quantifier: between n and m

martinhj

# Linux (when in need for read/write on ext*
losetup -Pf --show imageFilePath.img
mount /dev/loop0p1 /mnt/

# Mac
hdiutil attach -nomount imageFilePath.img
sudo diskutil mountDisk /dev/disk2

# don't need this anymore... sudo mount -t msdos /dev/disk2s1 /Volumes/somethingsomething

martinhj

dd if=/dev/zero of=filewithsecret bs=1 count=12342 conv=notrunc
#                                            ^^^^^- filesize (ls -l filewithsecret)
#                                                  ^^^^^- notrunc: do not truncate the file if count is < filesize (do not leave secret bits and bytes hanging around on your disk....)

# Could combine this with a for loop to do it a couple of times if feeling extra 

martinhj

(() => {

  const flattenArray = (acc, cur) => acc = [...acc, ...cur]
  const queryElement = selector => document.querySelector(selector)
  const getAllChildren = elem => elem.children
  const removeElem = elem => elem && elem.parentElement.removeChild(elem);
  const removeClassFromElem = (elem, styleclass) => elem && elem.classList.remove(styleclass);
  const removeClassesFromElem = ([elem, styleclasses]) => styleclasses.forEach(styleclass => removeClassFromElem(elem, styleclass));
  const findAllChildrensExcept = (elemToRemoveExcept) => elemToRemoveExcept
    .map(([elem, keepChildrenQueries]) => [queryElement(elem), keepChildrenQueries.map(queryElement)])

martinhj

import React from 'react';
import Button from '.';
import { AlertButton, SubmitButton } from '.';

import { fireEvent, render, wait } from '@testing-library/react-native';
import Icon from '../Icon';

const caption = 'Test button';
const color = '#f00f0f';
const accessibilityLabel = 'This is a test button';

martinhj

[%raw "require('isomorphic-fetch')"]

let fetchUrl = "https://adventofcode.com/2019/day/1/input"

let calculateFuel = mass =>
  mass / 3 - 2

let add = (i, j) => i + j;

let parseResponse = text =>

martinhj

import * as ReactRedux from 'react-redux';

describe('nothing', () => {
  let loginFn = jest.fn(() => null);

  jest.spyOn(ReactRedux, 'useDispatch').mockImplementation(() => {
    return loginFn;
  });

  })

martinhj

# search git commits for specific string
git log -S thestring

# search stashes for specific string
git stash list -S thestring

martinhj

# Logs
heroku help logs
heroku logs --app=app-name                                                # also for apps in teams (without defining team)
heroku logs --app=pwp-integrated-decameron --num=500 --tail               # get 500 last lines and subscribe to future

# Plugins
heroku plugins:install heroku-plugin

heroku plugins:install heroku-builds
heroku help builds

martinhj

Desktop safari:
800x600
1366x768
1920x1080