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Showing posts from March, 2019

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Golang provide  own enumerate method which is easy and very powerful. I will show you enumerate with in a sec. When i code enumerate in java, believe me i don't understand why it's used? So i never play from this card at that time, but recently when i start learning go. Now i used where it's used and why? Enumerate basically a counting method. Code   package main import ( " fmt " ) type Weekend int const ( Sunday Weekend = iota Monday Tuesday Wednesday Thursday Friday Saturday ) func main () { fmt. Printf ( " %d " ,Saturday) } If you remember adding color layer then you familiar from this code.  First i create my own type called weekend then used this type.  Iota-generator:   Things that confuse you Sunday Weekend = iota & Monday without value. Before we start Iota-generator first we understand monday without type or value         const ( c = 1 // c : 1 d      // d : 1 ) fmt.Pr

Life is all about decisions and repeat your routine

Life is all about Decisions and repeat our routine is an excellent idea which i show you within a moment. Everyday we take so many decisions based on environment conditions, circumstances. Each decision based on cause and effect philosophy. Programmer are wizards who create own world with data and structures. Without data or structure our world is nothing. Conditions: Conditions help us to take decision based under certain circumstances, such as if a number divisible by 2 at least two times then it's said to be double even. package main import ( "fmt" ) func main() { const divisible =2 var even int = 4 if even%divisible == 0 { n := even/divisible n /= divisible if n ==1 { fmt.Println("Doubly Even")  } }   } If you're a developer then you you know this code quite different from other languages syntax. In most languages, you see like this "if (condition)". Yeah it's different but this language compilati

Adding colorful layer called typed constants

Sometime we need extra tools for advance problems like magician or wizard use their magic gown , advance spells . If You see Harry potter in your childhood then you remember. Without type constants everything fine but if you become a master then you know how to use advances tools.  if you interested in more examples then visit               Advance tools                                          Description 1      Typed Constants                                           solve your problem in your style 2.      Untyped Constants                                      use in scientific research 3.      grpc/protobuf                                              scale out your application (microservice) 4.       goroutines                                                   application optimization 5.       packages                                                      application deploy There Are few advances tools  which add extra layers or enhance application power. There&

House Foundation Complete

Like other person, we have our own toolkit. Programmer are similar to mathematician and magician. Why? Because Programmer play with logic , numbers . Magician play with your brain and mathematician like us numbers and logic. We start our show in a moment.  bool :  In golang only true and false are allowed. if you use 0 for true and 1 for false or vice                     versa then you have to convert into before play.  string : In golang string as literal commonly used.                 var s string = "hello"                    s := "hello"                  both are valid cases.  rune : What's is that? Golang provide you new data type for utf8 or unicode data. Rune                    data  also called unicode. You know other languages are not supported by                              computer.  Sometime we need a key that represent a word in any language. With                   the   help of Unicode you can write dozens of words in any language.

Basic Components II

In my previous article, We had seen how variables such as integers in action.  Float In Golang float have two classes like integers.          float32          float64 Float32, used when accuracy and precision doesn't matter Float64 used in scientistic simulation where precision of data really matter. package main import ( "fmt" "math" ) func main() { var radius float64 = 3.0 fmt.Println(2 * math.Pi *(math.Pow(radius,2))) }             Math:         Just like C you can import package before use  , that why i import math package.             math.pi:         Go provide build-in package math which handle all mathematical operation such as pi, sin-function , cose-function etc.           math.Pow:   In Go power function already in math package. Pow take two parameters one number and second degree. Pow return in float64. Because of Pow type we initialize our variable with similar data-type. If data type are not same then you need to type conver

Go Foundation

Golang Language is pretty good language. Most of us start our career from C the mother of all Languages. If you build a house you know know to build that.       Components of house             1. Variables             2. Constants             3. Functions             4. Conditions             5. Loops Variables       Let start with Variables. In Golang there're so many types of variables int , float , string, byte , complex , pointers etc. In go-lang integers exit in five classes. Each class has own properties       int       int8       int16       int32       int64                 Int          integers range start from 0 to 65535.                  Int8         integers of this class start from 0 to 2^8.                 Int16         Similar like int8 it start with 0 to 2^16. if you had write a code you know integers have two types          signed and unsigned There're so many operations on integers such as addition, increment, less than etc. I w