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brew install figlet coreutils  # for OSX

figlet -f $(ls $(brew --prefix figlet)/share/figlet/fonts/ | grep ".flf" | shuf -n 1) "Atmanaut"

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package main

import (
	"fmt"
	"math"
)

type ErrNegSqrt float64

func (e ErrNegSqrt) Error() string {

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package main

import "golang.org/x/tour/reader"

type MyReader struct{}

// TODO: Add a Read([]byte) (int, error) method to MyReader.
func (reader MyReader) Read(b []byte) (int, error) {
	for i := range b {
		b[i] = 'A'

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package main

import (
	"io"
	"os"
	"strings"
)

type rot13Reader struct {
	r io.Reader

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package main

import (
	"golang.org/x/tour/pic"
	"image"
	"image/color"
	"math/rand"
	"fmt"
)

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package main

import (
	"golang.org/x/tour/tree"
	"fmt"
)

// Walk walks the tree t sending all values
// from the tree to the channel ch.
func Walk(t *tree.Tree, ch chan int) {

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// only touching the Crawl func, as instructed
// https://tour.golang.org/concurrency/10

// Crawl uses fetcher to recursively crawl
// pages starting with url, to a maximum of depth.
func Crawl(url string, depth int, fetcher Fetcher) {
	m := map[string]bool{url: true}
	var mx sync.Mutex
	var wg sync.WaitGroup
	var subcrawl func(string, int)

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/* from 

https://inclusive-components.design/tooltips-toggletips/

"The visually-hidden class corresponds to some special CSS we've discussed before on Inclusive Components.
It hides the <span> visually without stopping it from being read out in screen readers."
*/

.visually-hidden {
  clip-path: inset(100%);

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{
  "0b111111": {
    "hexagram": "䷀",
    "kingwen": 1,
    "name": {
      "chinese": "乾",
      "pinyin": "Qián",
      "english": "The Creative (Heaven)"
    },
    "trigramPair": {

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package main

import "golang.org/x/tour/pic"

func Pic(dx, dy int) [][]uint8 {
    grid := make([][]uint8, dy)
    for y := range grid {
        line := make([]uint8, dx)
        for x := range line {
            line[x] = uint8(y-x)