Training Day2 - adithnaveen/swiggy-2020-july GitHub Wiki

College Project

4 People per project write code DB Testing Team Management Documentation - Presentation - Report

Water Fall Model

  • Requirement
  • Design
  • Implement (Development)
  • Testing
  • Maintenance

in agile

  • No Manager (Scrum Master) since it is smaller it is faster The investor (Stakeholder) can also be part of the developer ~ definite time (story points - spends 8 hrs - 32 hrs of work = 3.75)

  • pair programming I T COMB (TTTT) Agile will never force you to take more work

  • maybe in the planning

  • time estimation ~

Project Selection (DDD) - Deliver Business Value

Talking stakeholder - How the application is done (a few cases Given When Then) - BDD

you will validate the BL with Test cases (TDD)

Everything is in the form sprint (Scrum [fixed time line], Kanban [no fixed time, this only for the job])

Backlog Sprint - pertaining for the particular sprint Epic -> User Stories (login, add the product to cart) 1 Sprint - 1 Epic

     1 Epic - N User Stories 

     1 User Story - N Task 

     1 Task - N SubTask

Product - All user stories from the product owner and stakeholder

Go Lang - Day 2

Variable Decl

Explicit Decl (specify Data type) prefix with var = var anInteger int = 10; var aString string = "hello"

Implicit Decl (don't specify data type ) := assignment operator, without var anInteger := 44 (will take the value and create the variable of the specific type) aString :="How Are You"

constant (you cannot change the value once assigned)

explicit const anInteger int = 34;

implicit const aString = "hlo how are you "

Boolean - bool

String - string

Integer - uint8, uint16, uint32, uint64, int8, int16, int32, int64

Aliases - byte int, uint, uintptr

Folat - folat32, float 64

Complex - complex64, complex128

Predeclared Complex Types

Data Collection - Arrays, Slices(dynamic), Maps, Structs

Language-Specific Constructs - Functions, Interfaces, Channels, Routies (Thread)

Data Management - Pointers

No implicit conversion Ex: var int1 int = 10 var float1 float = 23

// this will not work

sum:=int1 + float1 mismatched types from int and float

solution (wrap value in target type, like a function call float64(value))

sum:=float64(int1) + float1

new(), make() - to initialize

  1. new() - allocated but does not initialize the memory, result in zero storage, also returns the address
  2. make() - allocated and initialized the memory, non-zero storage and returns the memory address The make built-in function allocates and initializes an object of type slice, map, or chan (only).

you don't have to take of memory deallocation - it's done automatically

func Errorf(format string, a ...interface{}) error func Printf(format string, a ...interface{}) (n int, err error)

slice mynumber = make([] int ,500000000, 3)

List number = new ArrayList<>(5); - size -> 0

-- Varun code sort.Slice(ints, func(i, j int) bool { return ints[i] > ints[j] })

type IntSlice []int

type MyString string

type Animal interface { Speack() string Walk() string Age() int }

ints -> slice []int

IntSlice attaches the methods of Interface to []int, sorting in increasing order.

ints-> type Interface interface { Len() int Less(i, j int) bool Swap(i, j int) }

sort.Sort(sort.Reverse([] int)) sort.Sort(sort.Reverse(sort.IntSlice(ints))

[2] - arrays , [] - slice (only Value)

Key, Value (Map) "Harry", "#123, Conconrd Street, Virginia" 123, "Harry"

in java

interface MyInterface{ void speak(); }

// it is a mandate to override the method in child class class Dog implements MyInterface. { void speak(){} }

c++

class SomeClass{ void someFunction()=0 }

class Dog : SomeClass. { public :
void someFunction(){} }

Program

  1. Write a program which has the struct Emp -> empid, empname, salary, address type Address struct { hno, street, city, pin }

Accept the values from the end-user, for initial 5 employees, you should give an option for use to quit in between Q (if Condition) then display the details

There is a need for contracting to eat, sleep, breath -> interface called Animal If the user enters more than 5 employees then the size of the slice should be +5