LINKS AND COOL HACKS

links-and-cool-hacks.txt

RTL relay testings
https://github.com/facebook/relay/blob/master/packages/relay-test-utils/__tests__/RelayMockEnvironmentWithComponents-test.js
https://github.com/entria/entria-fullstack/pull/109/files

Very easy native splash screen on Xcode
https://medium.com/@kelleyannerose/react-native-ios-splash-screen-in-xcode-bd53b84430ec

Init rn app on specific rn version
(rn cli 2.0.1+)
react-native-cli init --version="[email protected]" my project

// correct CRA usage
yarn create react-app my-app

// mongo regex example
db.Event.find({ title: {$regex: new RegExp("tom", "i")} })[0]

// rn network debug
https://github.com/jhen0409/react-native-debugger/issues/382
```
// add to index.js
global.XMLHttpRequest = global.originalXMLHttpRequest || global.XMLHttpRequest;
global.FormData = global.originalFormData || global.FormData;

if (window.FETCH_SUPPORT) {
  window.FETCH_SUPPORT.blob = false;
} else {
  global.Blob = global.originalBlob || global.Blob;
  global.FileReader = global.originalFileReader || global.FileReader;
}
```

Renato Bohler's tmux config
```
set-option -g default-shell /bin/zsh
set -g utf8
set-window-option -g utf8 on
set -g status off
set -g default-terminal "screen-256color"
set -g prefix C-a
unbind C-b
set -sg escape-time 1
set-option -g base-index 1
setw -g pane-base-index 1
bind r source-file ~/.tmux.conf \; display "Reloaded!"
bind | split-window -h
bind - split-window -v
```

// calculate ssh key fingerprint
- cat public key, remove leading strings, copy base64payload
- echo -n $base64payload | base64 -D | md5

// replaceAtIndex helper
export const replaceAtIndex = <Item = any>(array: Item[], index: number, item: Item): Item[] => {
  return [...array.slice(0, index), item, ...array.slice(index + 1)];
};

export const ONE_SECOND_IN_MILLISECONDS = 1000;
export const ONE_MINUTE_IN_MILLISECONDS = 60 * ONE_SECOND_IN_MILLISECONDS;
export const ONE_HOUR_IN_MILLISECONDS = 60 * ONE_MINUTE_IN_MILLISECONDS;
export const ONE_DAY_IN_MILLISECONDS = 24 * ONE_HOUR_IN_MILLISECONDS;
export const SEVEN_DAYS_IN_MILLISECONDS = 7 * ONE_DAY_IN_MILLISECONDS;

json to typescript type conversion
https://transform.tools/json-to-typescript

awesome phone regex
https://regex101.com/r/MNWXbW/3

convert salaries between year/hour/month
new Array(130).fill(0).map((x, i) => (i+4) * 5000).map(year => ({ year, hour: (year/1920.1755589082431).toFixed(0), month: (year/12).toFixed(0) }))

cool thoughts articles tweets ideas
https://stopa.io

github gif how to
![](name-of-giphy.gif)

kill branches that have no remotes
```bash
git branch -vv | grep ': gone]'|  grep -v "\*" | awk '{ print $1; }' | xargs -r git branch -D
```

twitter bot translation google translate npm library
https://github.com/vitalets/google-translate-api

how to grep git source code
```
git grep <regexp> $(git rev-list --all)
```

how to grep git commit msg
```
<your fav git log alias> --grep="foo"
```

git push a few commits to origin
```
git push origin 91143c3:fix-52-2
```
where 91143c3 is the last commit you want to push, and fix-52-2 is the branch on origin to push to.
this actually pushes all child commits of 91143c3 to origin because commits are chained together.
so, if you'd like to push a range, push the head commit with this technique.

when doing complex stuff, find the simples code that works and build from there

Go

Installing private repos as packages

update ~/.gitconfig with

[url "ssh://[email protected]/"]
      insteadOf = https://github.com/

run go env -w GOPRIVATE=github.com/eleanorhealth/* and add to shell init file export GOPRIVATE=github.com/eleanorhealth/*
run ssh-keyscan github.com > ~/.ssh/known_hosts
try to run go mod download "github.com/eleanorhealth/member-server@<latest commit on main>" and see if you get no errors, if so, run go get "github.com/eleanorhealth/member-server@<latest commit on main>" to add the package

notes

omitting the commit hash doesn't work
ssh-key add may be needed on mac, it will prompt you for password
code must be merged to main

coverage unit

go get golang.org/x/tools/cmd/cover
go test -race -coverprofile .coverage ./svc/server/application/application/...
go tool cover -html=.coverage

/**
 * Maybe captures the result of some operation that may fail.
 * If there is an non null error, attempting to retrieve result will throw.
 */
export class Maybe<T> {
    #result: T | null
    #error: Error | null

    // constructor(data: Data | null, error: Error | null) {
    constructor() {
        this.#result = null
        this.#error = null
    }

    /**
     * throws unless error() returns null.
     */
    result(): T {
        if (this.#error) {
            throw this.#error
        }

        if (this.#result === null) {
            throw new Error("null data")
        }

        return this.#result
    }

    /**
     * if null, result() is safe to call
     */
    error() {
        return this.#error
    }

    /**
     * error must be null for result to be read
     */
    setResult(data: T) {
        this.#result = data
    }

    /**
     * blocks result from being read
     */
    setError(message: string) {
        this.#error = new Error(message)
    }
}

AI

52.7k words on member-server codebase
244 non mock non test files
find . -type f -name *.go | grep -Ev test.go | grep -Ev mock
avg 314 words per file (handlers)
avg 215 word per file (codebase)
say 5k words for a massive conversation context with ai
have 59k words of context to use with ai