lakshmankashyap

#MongoDB 3.2.x Sharding Sharding is used when the database is too large to run on a single server and you need to spread the load across multiple servers. The name itself refers to the breaking (sharding) of the data into seperate groups of data which will reside on different servers.

##Configuration Server Start the server on your server (myserver0)

mongod --configsvr --dbpath /data

On myserver1 start the shard giving the configuration server as the --configdb option

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Ondrej Sika <[email protected]>

Database

Select Database

use DATABASE_NAME

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# Get documents, where writters are Joel Coen and Ethan Coen.
db.movieDetails.find({ "writters" : ["Joel Coen", "Ethan Coen"] }).count()

# Get documents, where Jeff Bridges is playing leading role.
> db.movieDetails.find({ "actors.0": "Jeff Bridges" }).pretty()

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var accounts = [
  { name: 'James Brown', msgCount: 123 },
  { name: 'Stevie Wonder', msgCount: 22 },
  { name: 'Sly Stone', msgCount: 16 },
  { name: 'Otis Redding', msgCount: 300 }  // Otis has the most messages
];

// get sum of msgCount prop across all objects in array
var msgTotal = accounts.reduce(function(prev, cur) {
  return prev + cur.msgCount;

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// ./__mocks__/localStorage.js
let mockStorage = {};

module.exports = window.localStorage = {
  setItem: (key, val) => Object.assign(mockStorage, {[key]: val}),
  getItem: (key) => mockStorage[key],
  clear: () => mockStorage = {}
};

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#
# Copyright IBM Corp. All Rights Reserved.
#
# SPDX-License-Identifier: Apache-2.0
#
version: '2'

services:

  ca.org1.example.com:

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# Example of dynamically overriding locale in Sails.js

For instance, if your app allows users to pick their preferred language, you might create a [policy](http://sailsjs.com/documentation/concepts/Policies) which checks for a custom language in the user's session, and if one exists, sets the appropriate locale for use in subsequent policies, controller actions, and views:

```js
// api/policies/localize.js
module.exports = function(req, res, next) {
  // If no user is logged in, continue with the default locale.
  if (!req.session.userId) {return next();}
  // Load the user from the database

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NOTE -

• Remove -h option if you are doing operation on same machine
• Remove -u , -p option if your database don't have username and password

Binary

Import database

mongorestore -h IP:port -d DB_Name -u user_name -p password <input db directory>

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//const argv = require('minimist')(process.argv.slice(2));
const Web3 = require("web3")
let web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545"))
console.log(web3)

let bip39 = require("bip39")
let hdkey = require('ethereumjs-wallet/hdkey')
let mnemonic = "weather cancel symptom owner lumber bitter bread butter dice trial shrug glance"
let hdwallet = hdkey.fromMasterSeed(bip39.mnemonicToSeed(mnemonic))
// Set to m/44'/60'/0' for ledger nano s hardware wallet compatibilty

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var Bitcore = require('bitcore');
var Address = Bitcore.Address;
var HDPrivateKey = Bitcore.HDPrivateKey;

var hdPrivateKey = new HDPrivateKey.fromSeed("bf8e06fd8c0dafbc831933422895ad68c0874439e177f136f8f756b360de94f8");
var hdPublicKey = hdPrivateKey.hdPublicKey;

var address = new Address(hdPublicKey.derive( Math.floor(Date.now() / 1000) ).publicKey);
var derivedAddress = new Address(hdPublicKey.derive( Math.floor(Date.now() / 1000) ).publicKey);