Ajay-Raj-S

package datastructures;

import java.util.ArrayList;

public class checkLoop {
    Node head = null;
    Node last = null;
    int size = 0;
    
    static class Node {

Ajay-Raj-S

package datastructures;

public class StackUsingLL {
    
    private Node top = null;
    private Node head = null;
    private int size = 0;
        
    class Node {
        int data;

Ajay-Raj-S

#include<stdio.h>
#include<stdlib.h>

struct node {
	struct node* parent;
	struct node* left;
	int value;
	struct node* right;
};

Ajay-Raj-S

#include<stdio.h>
#include<stdlib.h>
#define MAX 5

int front = 0;
int last = 0;
int queue[MAX];

void enqueue(int val) {		 
	queue[last++] = val;

Ajay-Raj-S

#include<stdio.h>
#include<stdlib.h>
#define MAX 10

int top = -1;
int stack[MAX];

void push(int val) {
	stack[++top] = val;
	printf("Value Pushed!\n");

Ajay-Raj-S

#include<stdio.h>
#include<stdlib.h>


// circular linked list using Singly Linked list
struct circular {
	int value;
	struct circular* next;
};

Ajay-Raj-S

#include<stdio.h>
#include<stdlib.h>

struct doubly {
	struct doubly* prev;
	int value;
	struct doubly* next;
};

typedef struct doubly* node;

Ajay-Raj-S

#include<stdio.h>
#include<stdlib.h>

struct list {
	int value;
	struct list* next;
};

struct list* root = NULL;
struct list* lastNodeAddr = NULL;

majackson

Django Migrations without Downtime

The following instructions describe a set of processes allowing you to run Django database migrations against a production database without having to bring the web service down.

Note that in the below instructions, migrations are all run manually at explicit points, and are not an automatic part of the deployment process.

Adding Fields or Tables

Adding a (nullable) field or a new table

1. Make the model or column addition in your code.

bradmontgomery

# Here's your list of choices that would be displayed in a drop-down 
# element on the web.  It needs to be a tuple, and we define this
# as a variable just for readability/convenience. 
#
# This example has 3 choices, each of which consists of two parts:
# 1. the thing that get strored in your database
# 2. the thing that you see in a dropdown list
LABEL_CHOICES = (
    ('this gets stored in your database', 'This item is what you see in the drop-down'),
    ('django', 'Django'),