Stop Git from messing with my newlines

I’m sorry, but I just hate when Git is messing with my files…

warning: CRLF will be replaced by LF in some/file.ext.
The file will have its original line endings in your working directory.

That’s just not its job! If I want to enforce a certain new line regime, there’s linting tools, pre-commit hooks, etc.

The following should stop it, but frankly, sometimes it feels like git just keeps inventing new ways of reverting to its hyper annoying default…

# First run this to see where it's configured now
> git config --list --show-origin

# Then run whichever works...
> git config --global core.autocrlf false
> git config --system core.autocrlf false
> git config --local core.autocrlf false

Enable SQL logging in Play 2.5+

Just a note to self on how to get (in my case) IntelliJ to spit out all SQL statements happening during unit tests.

  1. Add the following to application.conf
    db.default.logSql=true
  2. Add the following to logback.xml
    <logger name="org.jdbcdslog.ConnectionLogger" level="OFF"  />
    <logger name="org.jdbcdslog.StatementLogger"  level="INFO" />
    <logger name="org.jdbcdslog.ResultSetLogger"  level="OFF"  />

Source: StackOverflow

JavaScript: In-browser export to CSV

This function will turn an array of data into a CSV file and get the browser to “download” it. It should also be wrapping and escaping values properly and, because of the BOM, be read correctly when opened in e.g. Excel.

It’s written in TypeScript ("lib": ["ES2017", "DOM"]), but should be easy to “downgrade” to regular JS if needed…

type GetValue <T> = <I extends T>(item: I) => any;
type FieldName <T> = keyof T;

export interface Columns<T> {
  [s: string]: FieldName<T> | GetValue<T>;
}

const COLUMN_SEPARATOR = ';';
const ROW_SEPARATOR = '\r\n';
const UNICODE_BOM = '\uFEFF';

const wrapValue = (value: string) => `"${value}"`;
const escapeValue = (value: string) => (value || '').replace(/"/, '""');

const toHeaderRow = <T> (columns: Columns<T>) => Object
  .keys(columns)
  .map(escapeValue)
  .map(wrapValue)
  .join(COLUMN_SEPARATOR);

const toRow = <T> (columns: Columns<T>, item: T) => Object
  .values(columns)
  .map(field => typeof field === 'function' ? field(item) : item[field])
  .map(String)
  .map(escapeValue)
  .map(wrapValue)
  .join(COLUMN_SEPARATOR);

export const exportToCsv = function <T> (data: T[], columns: Columns<T>, filename: string): void {
  const rows = [];

  rows.push(toHeaderRow(columns));

  for (const item of data) {
    rows.push(toRow(columns, item));
  }

  const csv = UNICODE_BOM + rows.join(ROW_SEPARATOR);
  const uri = `data:text/csv;charset=utf-8;header=present,${encodeURIComponent(csv)}`;

  const link = document.createElement('a');
  link.setAttribute('href', uri);
  link.setAttribute('download', filename);
  link.addEventListener('click', () => link.parentNode.removeChild(link));
  document.body.appendChild(link);

  link.click();
};

Usage

const users: User[] = [{id: 1, name: 'Alice', isCool: true}, ...];
const columns: Columns<User> = {
  'Id': 'id',
  'Name': 'name',
  'Is cool': user => user.isCool ? 'Yes' : 'No',
};
exportToCsv(users, columns, 'users.csv');

Minecraft: Remove invisible Roots 2 mob spawner

Playing Enigmatica 2 and found a Roots 2 hovel, half into the ground, thatch roof, chests and monsters inside. Cleaned it out, filled it with dirt. Thought it was gone. But monsters kept spawning… Inside the dirt… Opened it back up… Monsters kept spawning… No spawners in sight…

Turns out, there was an invisible entity doing the spawning… Was able to fix it by standing close by and running the following command:

/kill @e[type=!Player,r=10]
Killed entity.barrow.name

After that, no mobs… weird stuff…

Source: forum.feed-the-beast.com

Fix IntelliJ Alt Gr not working

I’ve several times had the Alt Gr key stop working while using IntelliJ. On norwegian keyboards, this key is essential in typing e.g. the brackets {} and [], so it not working is extremely annoying. And what increases the annoyance even more, is that, when this happens, the key for some reason stops working in other programs too.

Anyways, this seemed to fix it, on my machine at least, for now:

  1. Go to Help \ Edit Custom Properties
  2. Paste in this line:
    actionSystem.force.alt.gr=true
  3. Restart IntelliJ

With a hint of Social Ineptitude