leetcode-notes

👧 tangi

ತಂಗಿ [tangi] Kan. younger sister
ಅಕ್ಕ [akka] Kan. older sister

Lightweight actor library for Web Workers inspired by Akka.

What is this?

Type-safe, production-ready and lightweight messaging layer for Web Workers.

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System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

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from apiclient.discovery import build

def build_service(filename):
    with open(filename) as f:
        key = f.readline()

    YOUTUBE_API_SERVICE_NAME = "youtube"
    YOUTUBE_API_VERSION = "v3"
    return build(YOUTUBE_API_SERVICE_NAME,
                 YOUTUBE_API_VERSION,

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<?php

namespace App\Service\Pay;

/**
 * TaiwanPay
 */
class TaiwanPay
{
	/**

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.css-selector {
    background: linear-gradient(147deg, #6d2ff6, #6dac67);
    background-size: 400% 400%;
    -webkit-animation: AnimationName 11s ease infinite;
    -moz-animation: AnimationName 11s ease infinite;
    -o-animation: AnimationName 11s ease infinite;
    animation: AnimationName 11s ease infinite;
}
@-webkit-keyframes AnimationName {
    0%{background-position:9% 0%}

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#predicting the streaming kafka messages
consumer = KafkaConsumer('twitter-stream',bootstrap_servers=\['localhost:9092'])
print("Starting ML predictions.")
for message in consumer:
X_new_counts = count_vect.transform([message.value])
X_new_tfidf = tfidf_transformer.transform(X_new_counts)
predicted = load_model.predict(X_new_tfidf)
print(message.value+" => "+fetch_train_dataset(categories).target_names[predicted[0]])

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#include <algorithm>
#include <iostream>
#include <set>

using namespace std;

struct Node {
    int a;
    long long w;
    Node *prev;

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// This is an example of how to fetch external data in response to updated props,
// If you are using an async mechanism that does not support cancellation (e.g. a Promise).

class ExampleComponent extends React.Component {
  _currentId = null;

  state = {
    externalData: null
  };

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Umbrella Challenge

Given a number of people N and an array of integers, each one representing the amount of people a type of umbrella can handle, output the minimum number of umbrellas needed to handle N people.

No umbrella could have left spaces. Which means if a umbrella can handle 2 people, there should be 2 people under it.

If there's no solution, return -1.

Examples