Tutorial by Examples: le

The pygame.mixer module helps control the music used in pygame programs. As of now, there are 15 different functions for the mixer module. Initializing Similar to how you have to initialize pygame with pygame.init(), you must initialize pygame.mixer as well. By using the first option, we initiali...

The LAG function provides data on rows before the current row in the same result set. For example, in a SELECT statement, you can compare values in the current row with values in a previous row. You use a scalar expression to specify the values that should be compared. The offset parameter is the n...

The PERCENTILE_DISC function lists the value of the first entry where the cumulative distribution is higher than the percentile that you provide using the numeric_literal parameter. The values are grouped by rowset or partition, as specified by the WITHIN GROUP clause. The PERCENTILE_CONT functi...

var passport = require('passport'); var LocalStrategy = require('passport-local').Strategy; passport.serializeUser(function(user, done) { //In serialize user you decide what to store in the session. Here I'm storing the user id only. done(null, user.id); }); passport.deserializeUser(funct...

Haystack: The string in which given pattern needs to be searched. Needle: The pattern to be searched. Time complexity: Search portion (strstr method) has the complexity O(n) where n is the length of haystack but as needle is also pre parsed for building prefix table O(m) is required for building p...

Question: What is the output of code below and why? setTimeout(function() { console.log("A"); }, 1000); setTimeout(function() { console.log("B"); }, 0); getDataFromDatabase(function(err, data) { console.log("C"); setTimeout(function() { ...

Example Data Please try to provide a minimal example input data in a format that can be directly used by the answers without tedious and time consuming parsing for example input file or local collection with all code required to create distributed data structures. When applicable always include ty...

In your routes/index.js Here user is the model for the userSchema router.post('/login', function(req, res, next) { if (!req.body.username || !req.body.password) { return res.status(400).json({ message: 'Please fill out all fields' }); } passpor...

package main import ( "encoding/gob" "os" ) type User struct { Username string Password string } func main() { user := User{ "zola", "supersecretpassword", } file, _ := os.Create("user.go...

package main import ( "encoding/gob" "fmt" "os" ) type User struct { Username string Password string } func main() { user := User{} file, _ := os.Open("user.gob") defer file.Close() decoder := gob...

Assume that I have a file named in.txt: $ cat in.txt a b a c a d I only want to replace the a\nc with deleted, but not a\nb or a\nd. $ sed -e ':loop # create a branch/label named `loop` $!{ N # append the next line of input into the pattern space /\n$/!b...

Setup Steps: Download and install jdk8. Add the following to your project’s main build.gradle buildscript { repositories { mavenCentral() } dependencies { classpath 'me.tatarka:gradle-retrolambda:3.2.3' } } Now add this to your application m...

class Person { String name; public Person(String name) { this.name = name; } @Override public boolean equals(Object o) { if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; Person person = (Person) ...

While coding a script or a function, it can be the case that one or more than one temporary file be needed in order to, for example, store some data. In order to avoid overwriting an existing file or to shadow a MATLAB function the tempname function can be used to generate a unique name for a te...

If you load your fit parameters from a file, you should declare in it all the parameters you're going to use and, when needed, initialise them. ## Start parameters for the fit of data.dat m = -0.0005 q = -0.0005 d = 1.02 Tc = 45.0 g_d = 1.0 b = 0.0100...

The abstract class IntentService is a base class for services, which run in the background without any user interface. Therefore, in order to update the UI, we have to make use of a receiver, which may be either a BroadcastReceiver or a ResultReceiver: A BroadcastReceiver should be used if your s...

using MailKit.Net.Smtp; using MimeKit; using MimeKit.Text; using System.Threading.Tasks; namespace Project.Services { /// Using a static class to store sensitive credentials /// for simplicity. Ideally these should be stored in /// configuration files public static class C...

Before starting with deletion I just want to put some lights on what is a Binary search tree(BST), Each node in a BST can have maximum of two nodes(left and right child).The left sub-tree of a node has a key less than or equal to its parent node's key. The right sub-tree of a node has a key greater ...

Array Implementation #include<stdio.h> #define MAX 100000 //Global variables int top = -1; int a[MAX]; void push(int x){ if(top == MAX-1){ // Check whether stack is full printf("Stack Overflow\n"); retur...

From VBA array sort function? Public Sub QuickSort(vArray As Variant, inLow As Long, inHi As Long) Dim pivot As Variant Dim tmpSwap As Variant Dim tmpLow As Long Dim tmpHi As Long tmpLow = inLow tmpHi = inHi pivot = vArray((inLow + inHi) \ 2) While (tmpLow <=...