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/**
 * @param {number[][]} matrix
 * @param {number} target
 * @return {boolean}
 */
var searchMatrix = function(matrix, target) {
  if (matrix.length === 0) return false
  let filteredRows = getFilteredRows(matrix, target)
  let filteredCols = getFilteredCols(matrix, target)

albertywu

read plist -> xml file

defaults read -app Terminal | plutil -convert xml1 -o plist.xml -r -- -

albertywu

Map

replaces lines with a substring match of that line (capture groups)

sed -E 's/regex/string/'

echo "a secret: 12345" | sed -E 's/a secret: (.*)/\1/'

(outputs 12345)

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# filter rows in a file by line number / position
awk

# filter rows in a file by regex
grep

# filter cols in a file
awk

# transform rows by regex

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/*
Notes:

DataSource
  - a stream of data
    - hasNext(), getNext()
  - examples: Location, Transactions, Contacts, ...
  - an algorithm's output is a DataSource

Transaction

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type Methods = 'get' | 'post';

interface Req {
  data: object;
  method: Methods;
  url: string;
  foo?: number
}

class Req implements Req {

albertywu

#!/usr/bin/env bash
set -ex

PROJECT=$1
mkdir $PROJECT && cd $PROJECT
yarn init -y
yarn add -D @babel/cli @babel/core @babel/preset-env @babel/preset-flow
yarn add @babel/polyfill
echo "{\"presets\": [\"@babel/preset-env\", \"@babel/preset-flow\"]}" | jq >> .babelrc
mkdir src

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# add to your ~/.bash_profile or startup script
jazzygif () { ffmpeg -i "$1" -vf scale=-1:-1 -r 10 -f image2pipe -vcodec ppm - | convert -delay 5 -layers Optimize -loop 0 - "$2"; }

# here's how you run it (assumes that pug.mp4 is in current working directory)
jazzygif pug.mp4 pug.gif

# or, specify paths to files
jazzygif ~/Desktop/pug.mp4 ~/Documents/pugs/pug.gif

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// The "favoriteNumber" key returns a value that Int | String. Normalize the response.

val json1 = Json.parse(
  """
    |{
    |"name": "Albert",
    |"age": 32,
    |"favoriteNumber": 42
    |}
  """.stripMargin)

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// given: Array.prototype.forEach, derive:
// 1. reduce
// 2. concat
// 3. map
// 4. filter
// 5. flatten
// 6. flatMap

const reduce = (xs, f, z) => {
  var acc = z