SlideeScherz

const parseByContentType = async <T = unknown>(data: Response): Promise<T> => {
  const contentType = data.headers.get('Content-Type');

  if (contentType === null) {
    console.log('contentType is null');
    return (await data.text()) as T;
  } else if (contentType.includes('application/json')) {
    return (await data.json()) as T;
  } else if (contentType.includes('text')) {
    return (await data.text()) as T;

SlideeScherz

#!/bin/bash

tree=$(tree -tf --noreport -I '*~' --charset ascii $1 |
       sed -e 's/| \+/  /g' -e 's/[|`]-\+/ */g' -e 's:\(* \)\(\(.*/\)\([^/]\+\)\):\1[\4](\2):g')

printf "# Project tree\n\n${tree}"

SlideeScherz

Mocking .env in Jest

Mocking .env variables in isolation during Jest tests can be useful to test different scenarios without changing the actual .env file. This is helpful for functions that read from the .env file especially in a different scope or context.

getFilePath.ts

export const getFilePath = () => process.env.FILE_PATH;

SlideeScherz

git line count

git ls-files | grep -E '.(ts|tsx|js|jsx)$' | xargs wc --lines

output:

$ git ls-files | grep -e '.ts$' -e '.tsx$' | xargs wc --lines

SlideeScherz

$nodeVersion = node -v
Write-Host "Node.js Version: $nodeVersion"
if ($nodeVersion -eq $null) {
  Write-Host "Node.js is not installed."
  exit 1
}

$npmVersion = npm -v
Write-Host "npm Version: $npmVersion"
if ($npmVersion -eq $null) {

SlideeScherz

#!/bin/bash

# Install VS Code extensions
# if need to use powershell: https://gist.github.com/vmandic/ef80f1097521c16063b3b1c3a687d244

# `code --install-extension` will echo
# echo Installing VS Code Extensions...

extensions=(
    dsznajder.es7-react-js-snippets