tomwang1013

/**
 * 查找数组的top K元素
 * @param {Array} arr
 * @param {Number} k
 */
function topK(arr, k) {
  topKRange(arr, 0, arr.length - 1, k);
  return arr.slice(0, k);
}

tomwang1013

/**
 * quick sort an array arr
 * @param {Array} arr 
 */
function quickSort(arr) {
  quickSortRange(arr, 0, arr.length - 1);
}

/**
 * quick sort arr[l..h]

tomwang1013

/**
 * marge an array arr
 * @param {Array} arr 
 */
function mergeSort(arr) {
  mergeSortRange(arr, 0, arr.length - 1);
}

/**
 * merge sort arr[l..h]

tomwang1013

var express = require('express');
var cookieParser = require('cookie-parser');
var session = require('express-session');
var flash = require('express-flash');
var handlebars = require('express-handlebars')

var app = express();
var sessionStore = new session.MemoryStore;

// View Engines

tomwang1013

Consider these queries:
 
SELECT *
FROM Orders
LEFT JOIN OrderLines ON OrderLines.OrderID=Orders.ID
WHERE Orders.ID = 12345
 
and
 
SELECT *