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LINKS AND COOL HACKS
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tcodes0 commented Mar 13, 2021 •
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High level

speed

In posts talking about how someone made something fast, I see the same idea repeat time after time: it has linear time complexity, has great cache locality, and saturates all available processors.

Interview questions

technical, high-level

How do you handle the diversity of patterns within the JS ecosystem? maybe follow-up: What are some good solutions or patterns you have used that worked for you?
What's your thoughts on JS itself and it's current direction?

execution and team work

Have you worked with designers? what were some highlights there?
We all know it's very hard to give estimates, how to do you approach that? what's your attitude?
What is a big mistake in product process you've seen or committed yourself?
Your favorite meeting and why?
Tell me a good idea for a project that your company should take on, but will not. Explain from both sides, even if they are wrong.
Walk me through a project you enjoyed start to finish. Explain design decisions (why x and not y?)

code review

https://www.michaelagreiler.com/respectful-constructive-code-review-feedback/
https://phauer.com/2018/code-review-guidelines/
https://mtlynch.io/code-review-love/

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tcodes0 commented Apr 15, 2022 •
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Datadog

APM traces

query samples

Service:hub-server @url:*drivers-license*
trace_id:2934837843

tricks

search for logs using kubectl, find trace id, then do https://app.datadoghq.com/apm/trace/{id}

if code looks like this

infra.Logger.Info().Str("event", "message.new")

query to find field would be @event:message.new

RUM custom actions

find with @action.target.name:foobar

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tcodes0 commented Jul 13, 2022 •
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Cookie cliker

// node
prestigeLvls = Math.cbrt((allTimeCookies + popingWrinklers + sellingBuildings + difference) * 10 ** 18 /* 18 for quintilion cookies*/)/10000
// load cookie monster into cookie clicker
Game.LoadMod('https://cookiemonsterteam.github.io/CookieMonster/dist/CookieMonster.js');

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tcodes0 commented Mar 8, 2023 •
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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

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tcodes0 commented Jul 30, 2023 

/**
 * 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)
    }
}

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tcodes0 commented Aug 24, 2023

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

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