mewben

So you want to write a sync system for a web app with offline and realtime support? Good luck. You might find the following resources useful.

Overview articles

• Database in a browser, a spec (Stepan Parunashvili)

  What problem are we trying to solve with a sync system?

• The web of tomorrow (Nikita Prokopov)

mewben

import 'package:flutter/material.dart';
import 'dart:math';

class RotatedIcon extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Transform.rotate(
      angle: 90 * pi/180,
      child: Icon(Icons.flight),
    );

mewben

var date = new Date();
var daysToDeletion = 120;
var deletionDate = new Date(date.setDate(date.getDate() - daysToDeletion));

printjson(deletionDate);

var db = db.getSiblingDB('db')
db.getMongo().setSlaveOk();

printjson(db.messages.find({insertDate : {$lt : deletionDate}}).count());

mewben

const someFunction = async () => {
  try {
    // wait 5 sec before sending the response
    await new Promise(resolve => setTimeout(() => resolve(), 5000));
    return res.json({response: 'here'})
  } catch (error) {
    // return error
  }
}

mewben

Site.aggregate()
  .lookup({
    from: 'pages',
    localField: '_id',
    foreignField: 'siteID',
    as: 'pages',
  })
  .addFields({ pageCount: { $size: '$pages' } }) // add pageCount field
  .project({ pages: 0 }) // exclude pages array
  .exec();

mewben

/** round n down to nearest multiple of m */
long roundDown(long n, long m) {
    return n >= 0 ? (n / m) * m : ((n - m + 1) / m) * m;
}

/** round n up to nearest multiple of m */
long roundUp(long n, long m) {
    return n >= 0 ? ((n + m - 1) / m) * m : (n / m) * m;
}

mewben

GENERATORS:

• Text Content Generator - http://www.lipsum.com
• Favicon Generator - http://tools.dynamicdrive.com/favicon
• Data Generator - https://mockaroo.com/
• Mobile Mockup Generator - https://mockuphone.com
• Logo Generator - https://www.logaster.com
• UUID Generator - https://www.uuidgenerator.net/
• Hash Generator - https://passwordsgenerator.net/sha256-hash-generator/

IMAGE RESOURCES:

mewben

made with esnextbin

mewben

package main

import (
	"net/http"

	"github.com/labstack/echo"
	"github.com/labstack/echo/engine/fasthttp"
)

func main() {

mewben

#
# Makefile to perform "live code reloading" after changes to .go files.
#
# n.b. you must install fswatch (OS X: `brew install fswatch`)
#
# To start live reloading run the following command:
# $ make serve
#

# binary name to kill/restart