sorting via switch statement

JS

@davidmchale

If statement with switch delete duplicates from an array loop and find class Nullish with an Object - basic tranverse classes in a list substring capitalize substring text with elipses array.at() js media query Dynamic Filter - buttons advanced flow converted if statement Add an array to a HTML dataset getElement Function Intersection Observer template intersection Observer Basic Example fetch data, display and filter for of loop - get index get random index value from an array fetch with post method get id value from url debounce for scrolling get element or elements check functions return values from functions indexOf explantion sorting basic using for-of loop for getting index value of iteration import json data into a JS module Splide slider with modal JS change active class if url path matches Pagination / array of arrays FIlter array or return full array price formatting ignores wrapping element on click Create a dummy array with numbers Random Generated Number Dummy array - list items dummy id Limits the amount of text Random Number generator function format date function Remove duplicates from JSON array data Filter Posts from state remove duplicates and create object simple ternary remove transition with propertyName sorting in reverse counting items using reduce splice explanation Declaring Variables Get primitive properties on a number / string etc using proto check an array of objects exists / check using regex Destructuring nested function scope IFFE function basic switch Switch with function passing an object check length of object while loops (for when the number we are iterating over is unknown) Ternary with 2 / 3 conditions for of loop with index array nested ternary operator callbacks Method Borrowing this keyword and arrow functions rest operator - args functions p1 rest operator - args functions p2 for of loop with index and entries callback functions explained version 1 callback functions explained version 2 Form and value IF Element shorthand function as a callback inside a higher order function Using param for symbol remove 'px' from number scrolling behaviour test 1 clearing event listeners new URL applying css vars scroll behaviours testing intersection observer intersection observer with loop JS docs - writing js docs check is key exists call() nested ternary with function forEach with function and ...args using template literals filter duplicates get class by indexOf returning ternary operator remove children from parent bootstrap rows with cols fetching multple data endpoints Promise.all remove file extension Js snippet for aria expanded passes this from a function containing a listener, to another function dynamic function to change icons compare arrays and push to an empty instead of pushing an object to a data array return the Object.entries(data).map Creating Dynamic filtering using JSON Advanced toggling with 3rd param of force Dynamic Key Assignment flatmap for arrays passing key value pairs from one object to another FInding Prototype Methods Returns Items that are true returning the item data from an array of objects sorting via switch statement filtering with checkboxes JS Docs cheatsheat for param types matches Js syles object on a div element bind grouping groupby() checkbox example conditions modal for text links reduce - dynamic toggle class with force returning objects setProperty with CSS variables CONVERT setProperty with CSS variables to object and functions CONVERT setProperty with CSS variables to object and functions version 2 uses an object instead of a switch statement cookie object functions mapping 3 Async Await / Promise resolve reject filter filter out items from array1 based on array2 promise with init function

#javascript #controlflow #if...else #if #else #switch...case #switch #case

Control flow / Control de flujo (if...else/switch...case)

let userName = '';
/* Con nombre o sin nombre */
userName ? console.log(`Hello, ${userName}!`) : console.log('Hello!');
/* Se guarda la pregunta */
let userQuestion = 'Is this true?';
/* Se muestra la pregunta */
console.log(`Hey ${userName}! You just asked this: ${userQuestion}`);
/* Se genera un número aleatorio entre 0-8 */
randomNumber = Math.floor(Math.random() * 8);
/* Se guarda la respuesta en una variable */
let eightBall = '';
/* Se guardan distintas respuestas para el número que toque */
// takes in randomNumber, then eightBall = 'Reply'
// you can use if/else or switch;
// If the randomNumber is 0, then save an answer to the eightBall variable; if randomNumber is 1, then save the next answer, and so on.
/* Se utiliza switch */
/*
switch (randomNumber) {
  case 0:
    eightBall = 'It is certain';
    break;
  case 1:
    eightBall = 'It is decidedly so';
    break;
  case 3:
    eightBall = 'Reply hazy try again';
    break;
  case 4:
    eightBall = 'Cannot predict now';
    break;
  case 5:
    eightBall = 'My sources say no';
    break;
  case 6:
    eightBall = 'Outlook not so good';
    break;
  case 7:
    eightBall = 'Signs point to yes';
    break;
}
*/
/* Se utiliza if */
if (randomNumber === 0) {
  eightBall = 'It is certain';
} 
if (randomNumber === 1) {
  eightBall = 'It is decidedly so';
}
if (randomNumber === 2) {
  eightBall = 'Reply hazy try again';
}
if (randomNumber === 3) {
  eightBall = 'Cannot predict now';
}
if (randomNumber === 4) {
  eightBall = 'Do not count on it';
}
if (randomNumber === 5) {
  eightBall = 'My sources say no';
}
if (randomNumber === 6) {
  eightBall = 'Outlook not so good';
}
if (randomNumber === 7) {
  eightBall = 'Signs point to yes';
}
/* Se muestra */
console.log(eightBall);

#javascript #sort #typescript

Sort by boolean flags

const a = [
    {
        k: 1, me: false, prim: false
    }, {
        k: 2, me: false, prim: false
    }, {
        k: 3, me: false, prim: false
    }, {
        k: 4, me: false, prim: false
    }, {
        k: 5, me: true, prim: true
    }, {
        k: 6, me: false, prim: false
    }
]

a
    .sort((x, y) => (x.prim === y.prim) ? 0 : x.prim ? -1 : 1)
    .sort((x, y) => (x.me === y.me) ? 0 : x.me ? -1 : 1)

console.log(a)

#applescript #sort #files

Apple Script that sorts even pages to a new folder. Separates even from odd.

set srcFldr to (choose folder with prompt "Select the source folder:")
set destFldr to (choose folder with prompt "Select the destination folder:")
tell application "Finder"
	--set fileList to files of srcFldr -- sorted by name in HFS Plus' fashion (?)
	set fileList to sort (get files of srcFldr) by name -- sorted by name in Finder's fashion
	set fileCnt to count fileList
	set ff to {}
	repeat with i from 2 to fileCnt by 2
		set end of ff to item i of fileList
	end repeat
	move ff to destFldr -- you can move list at once
end tell

#modx #sortby #sort #id #resources #pdoresources

set sort by order by id MODX

 [[pdoResources?
                                        &parents=`0`
                                        &resources=`[[++company]], [[++new-products]], [[++used-products]], [[++koptika]], [[++services]], [[++brands]], [[++news]], [[++contact]]`
                                        &limit=`20`
                                        &depth=`10`
                                        &tpl=`footerLinksTPL`
                                        &sortby=`FIELD(modResource.id, [[++company]], [[++new-products]], [[++used-products]], [[++koptika]], [[++services]], [[++brands]], [[++news]], [[++contact]] )`
                                        &sortdir=`ASC`
                                        &showHidden=`1`
                                        &context=`[[!getContext]]`
                                    ]]

#javascript #array #sort

Sort array

const arr = [333,1,2,11,22,3,4]
console.log(arr.sort())

arr.sort((a,b)=>a-b)

console.log(arr)

#javascript #vanilla #sort #randomize #array

Custom sort : shuffle an array the quick way

const array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
const shuffledArray = array.sort((a, b) => 0.5 - Math.random());

// using Array map and Math.random
const shuffledArr = array => array.map(a => ({ sort: Math.random(), value: a })).sort((a, b) => a.sort - b.sort).map(a => a.value);

#javascript #vanilla #sort #randomize #array

Fisher-Yates algorith : (Really) shuffle and array

const shuffleArray = array => {
  for (let i = array.length - 1; i > 0; i--) {
    const j = Math.floor(Math.random() * (i + 1));
    const temp = array[i];
    array[i] = array[j];
    array[j] = temp;
  }
}

#javascript #vanilla #sort #randomize #array

Durstenfeld shuffle algorithm : Optimized Fisher-Yates

function shuffle(array) {
  const curIdx = array.length;

  // While there remain elements to shuffle...
  while (0 !== cur_idx) {
    // Pick a remaining element...
    const randIdx = Math.floor(Math.random() * curIdx);
    curIdx -= 1;

    // And swap it with the current element.
    const originalIdx = array[curIdx];
    array[curIdx] = array[randIdx];
    array[randIdx] = originalIdx;
  }
  return array;
}

// Usage of shuffle
const arr = [1, 2, 3, 4, 5, 6];
arr = shuffle(arr);
console.log(arr);

// shorter
function shuffle(array) {
    for (let i = array.length - 1; i > 0; i--) {
        var j = Math.floor(Math.random() * (i + 1));
        var originalIdx = array[i];
        array[i] = array[j];
        array[j] = originalIdx;
    }
}

//es6
function shuffle_array(array) {
    for (let i = array.length - 1; i > 0; i--) {
        const j = Math.floor(Math.random() * (i + 1));
        [array[i], array[j]] = [array[j], array[i]];
    }
}

#javascript #vanilla #sort #randomize #array

Shuffle a deck of cards

Example: Shuffle Deck of Cards

// program to shuffle the deck of cards

// declare card elements
const suits = ["Spades", "Diamonds", "Club", "Heart"];
const values = [
  "Ace",
  "2",
  "3",
  "4",
  "5",
  "6",
  "7",
  "8",
  "9",
  "10",
  "Jack",
  "Queen",
  "King",
];

// empty array to contain cards
let deck = [];

// create a deck of cards
for (let i = 0; i < suits.length; i++) {
    for (let x = 0; x < values.length; x++) {
        let card = { Value: values[x], Suit: suits[i] };
        deck.push(card);
    }
}

// shuffle the cards
for (let i = deck.length - 1; i > 0; i--) {
    let j = Math.floor(Math.random() * i);
    let temp = deck[i];
    deck[i] = deck[j];
    deck[j] = temp;
}

console.log('The first five cards are:');

// display 5 results
for (let i = 0; i < 5; i++) {
    console.log(`${deck[i].Value} of ${deck[i].Suit}`)
}

//output
The first five cards are:
4 of Club
5 of Diamonds
Jack of Diamonds
2 of Club
4 of Spades

#aws #boto3 #sqs #fifo #sort

sqs-sort-records-into-fifo.py

# Standard
import json  # Not jason.
import random  # Fair dice roll.
import time  # As if we could.
import uuid  # Not GUID!

# Boto3/Moto
import boto3  # Client factory of typing doom.
import moto  # Love and sanity for the masses.

queue_name = "EventQueue"
fifo_queue_name = "EventQueueSorted.fifo"
event_types = ["solid", "liquid", "gas"]

# Mock me if you must!
sqs_mocker = moto.mock_sqs()
sqs_mocker.start()

# Set up client.
sqs_client = boto3.client("sqs", region_name="us-east-1")

# Create standard queue for incoming events so that we can batch it up.
sqs_create_queue_result = sqs_client.create_queue(
    QueueName=queue_name,
)

queue_url = sqs_create_queue_result["QueueUrl"]

# Create FIFO queue and allow for deduplication using event ID from
# event provider.
sqs_create_fifo_queue_result = sqs_client.create_queue(
    QueueName=fifo_queue_name,
    Attributes={
        "FifoQueue": "true",  # Stringy boolean!
        "DeduplicationScope": "messageGroup",  # No comment!
        "FifoThroughputLimit": "perMessageGroupId",  # I said no comment!
    },
)

fifo_queue_url = sqs_create_fifo_queue_result["QueueUrl"]

# Make some fake records using fake timestamps. Ignore this awful.
records = [
    {
        "timestamp": int(
            (time.time() * 1000) + random.randint(-10000, 10000),
        ),
        "event_type": random.choice(event_types),
        "event_id": str(uuid.uuid1()),
    }
    for timestamp in range(10)
]

# Do the hokey pokey
random.shuffle(records)

for record in records:
    print(record)

# {'timestamp': 1628905019640, 'event_type': 'liquid', 'event_id': '1d6d987b-fca0-11eb-9b68-cbb48e88eb48'}
# {'timestamp': 1628905015766, 'event_type': 'liquid', 'event_id': '1d6d987f-fca0-11eb-9b68-cbb48e88eb48'}
# {'timestamp': 1628905019341, 'event_type': 'gas', 'event_id': '1d6d9881-fca0-11eb-9b68-cbb48e88eb48'}
# {'timestamp': 1628905012019, 'event_type': 'solid', 'event_id': '1d6d9880-fca0-11eb-9b68-cbb48e88eb48'}
# {'timestamp': 1628905026503, 'event_type': 'liquid', 'event_id': '1d6d987c-fca0-11eb-9b68-cbb48e88eb48'}
# {'timestamp': 1628905024388, 'event_type': 'gas', 'event_id': '1d6d9882-fca0-11eb-9b68-cbb48e88eb48'}
# {'timestamp': 1628905017491, 'event_type': 'gas', 'event_id': '1d6d9883-fca0-11eb-9b68-cbb48e88eb48'}
# {'timestamp': 1628905013437, 'event_type': 'solid', 'event_id': '1d6d987e-fca0-11eb-9b68-cbb48e88eb48'}
# {'timestamp': 1628905012744, 'event_type': 'solid', 'event_id': '1d6d987d-fca0-11eb-9b68-cbb48e88eb48'}
# {'timestamp': 1628905010779, 'event_type': 'gas', 'event_id': '1d6d987a-fca0-11eb-9b68-cbb48e88eb48'}

# Pretend we are uberkitten.io and we are sending you 10 out of order
# records

entries = []

for record in records:
    sqs_send_message_result = sqs_client.send_message(
        QueueUrl=queue_url,
        MessageBody=json.dumps(record),
    )

# ... Pretend we pooled up a bunch of messages over 300 seconds.

# With a Lambda based subscription we can pool thousands of messages
# over a very long period up to a 1MB payload... here in moto land
# we don't have the luxury but we can imitate.

sqs_receiver_message_result = sqs_client.receive_message(
    QueueUrl=queue_url,
    MaxNumberOfMessages=10,
)

# ... Pretend we are a LAMBDA that is now receiving a ton of messages.

# Note: This would usually be a "Records" event and use different key
# casing just because.. yeh.

messages = sqs_receiver_message_result["Messages"]

# Convert body back to JSON for all the messages before we go on.
for message in messages:
    message["DecodedBody"] = json.loads(message["Body"])

# I'm still undecided about MSG
messages.sort(key=lambda message: message["DecodedBody"]["timestamp"])

entries = []

# Iterate through messages and create a new bulk of entries from the
# newly sorted list.
for message in messages:
    record = message["DecodedBody"]
    entries.append(
        {
            "Id": str(uuid.uuid1()),
            "MessageBody": message["Body"],
            "MessageGroupId": record["event_type"],
            "MessageDeduplicationId": record["event_id"],
        }
    )

# Enqueue FiFoables.
sqs_send_message_batch_results = sqs_client.send_message_batch(
    QueueUrl=fifo_queue_url,
    Entries=entries,
)

# ... Pretend we pooled up the maximum batch size for a FIFO queue..
# which is not hard to pretend at all.

sqs_receiver_message_result = sqs_client.receive_message(
    QueueUrl=fifo_queue_url,
    MaxNumberOfMessages=10,
)

# ... Pretend we are ANOTHER LAMBDA that will be processing the "sorted"
# messages.

messages = sqs_receiver_message_result["Messages"]

records_by_event_type = {}

for message in messages:
    message["DecodedBody"] = json.loads(message["Body"])
    record = message["DecodedBody"]

    records_by_event_type.setdefault(record["event_type"], [])
    records_by_event_type[record["event_type"]].append(record)


# And now demonstrate how out of control an article script can get.
for event_type, records in records_by_event_type.items():
    print(event_type)
    for record in records:
        print(record)

# gas
# {'timestamp': 1628905010779, 'event_type': 'gas', 'event_id': '1d6d987a-fca0-11eb-9b68-cbb48e88eb48'}
# {'timestamp': 1628905017491, 'event_type': 'gas', 'event_id': '1d6d9883-fca0-11eb-9b68-cbb48e88eb48'}
# {'timestamp': 1628905019341, 'event_type': 'gas', 'event_id': '1d6d9881-fca0-11eb-9b68-cbb48e88eb48'}
# {'timestamp': 1628905024388, 'event_type': 'gas', 'event_id': '1d6d9882-fca0-11eb-9b68-cbb48e88eb48'}
# solid
# {'timestamp': 1628905012019, 'event_type': 'solid', 'event_id': '1d6d9880-fca0-11eb-9b68-cbb48e88eb48'}
# {'timestamp': 1628905012744, 'event_type': 'solid', 'event_id': '1d6d987d-fca0-11eb-9b68-cbb48e88eb48'}
# {'timestamp': 1628905013437, 'event_type': 'solid', 'event_id': '1d6d987e-fca0-11eb-9b68-cbb48e88eb48'}
# liquid
# {'timestamp': 1628905015766, 'event_type': 'liquid', 'event_id': '1d6d987f-fca0-11eb-9b68-cbb48e88eb48'}
# {'timestamp': 1628905019640, 'event_type': 'liquid', 'event_id': '1d6d987b-fca0-11eb-9b68-cbb48e88eb48'}
# {'timestamp': 1628905026503, 'event_type': 'liquid', 'event_id': '1d6d987c-fca0-11eb-9b68-cbb48e88eb48'}

# How dare you mock me!
sqs_mocker.stop()

#php #sort #array

Multisort

array_multisort(array_map(function($element) {
  return $element['key'];
}, $result), SORT_ASC, $result);

#javascript #strings #regex #sort #anagram #loops #unsolved

Valid Anagram

// SOLUTION 1 - MY (DISCOVERED) SOLUTION (RUNTIME - 104MS, 44.9 MB)
var isAnagram = function(s, t) {
    
    // set function to split, sort, and rejoin characters in a string
    const sortString = (str) => {
        return str.split("").sort().join("");
    }
    
    // regex removes any non-alphabet characters in the string and makes it lowercase
    s = s.replace(/[^\w]/g, '').toLowerCase()
    t = t.replace(/[^\w]/g, '').toLowerCase()

    // final comparison
    return sortString(s) === sortString(t)
  
  // ATTEMPT 1
  //     let anagram = []
    
  // return false is lengths don't match
  //     if (s.length !== t.length) return false;
  //     else {
  //         for (let i = 0; i < s.length; i++) {
  //             let arrT = t.split("")
  //             let newArrT;
  //             if (arrT.includes(s.charAt(i))) {
  //                 let index = arrT.indexOf(s.charAt(i));
  //                 console.log("s char: ", s.charAt(i));
  //                 console.log("index: ", index);

  //                 anagram.push(s.charAt(i))

  //                 console.log("splice: ", arrT.splice(index, 1))
  //                 arrT.splice(index, 0)

  //                 newArrT = arrT
  //                 console.log("newArr: ", newArrT)
  //             };
  //         };
  //     }
  //     console.log(anagram)
  //     return anagram.join("") === s;
}

// SOLTUION 2 - (BEST RUNTIME - 60MS)
var isAnagram = function(s, t) {
    const key = w => Object.entries([...w].reduce((a, c) => {
        if (!(c in a)) a[c] = 0;
        a[c] += 1;
      
        return a;
    }, {})).sort(([c1], [c2]) => c1.localeCompare(c2)).flat().join('');
  
    return key(s) === key(t);
};

// SOLUTION 3 - (RUNTIME - 72MS)
var isAnagram = function(s, t) {
    if(s.length !== t.length) return false;
  
    let map = {};
  
    for(let item of s) {
        map[item] = map[item] + 1 || 1;
    }
    
    for(let item of t) {
        if(!map[item]) return false;
        else map[item]--;
    }
  
    return true;
};

#sort #python

Selection Sort in Python - Computer Notes

def sort(nums):
    for i in range(5):
         minpos = i
         for j in range(i,6):
            if nums[j] < nums[minpos]:
               minpos = j
               temp = nums[i]
               nums[i] = nums[minpos]
               nums[minpos] = temp
nums = [5,3,8,6,7,2]
sort(nums)
print(nums)

#ios #swift #xcode #sort #array #sortarray

Sort Array

self.postModel = self.postModel.sorted(by: { $0.time_stamp > $1.time_stamp

#javascript #sort #bubble

bubble sort

function bubbleSort(arr){
  let len = arr.length;
  let cost = 0;
  
  for(let i=0; i<len; i++){
    for(let j=0; j<len-1; j++){
      if(arr[j] > arr[j+1]){
        swap(arr, j, j+1);
      }
    }
  }
  return arr
}

let unsortedArr = [0, 5, 6, 8, 2, 1, 3, 7, 4, 10, 12, 11]

console.log(bubbleSort(unsortedArr))

sorting via switch statement

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