todd_udemy_course/

Marshaling is the process of transforming the memory representation of an object to a data format suitable for storage or transmission, and it is typically used when data must be moved between different parts of a computer program or from one program to another.

bcrypt is a password hashing function designed by Niels Provos and David Mazières, based on the Blowfish cipher.

To illustrate how to sort on fields in a struct using Sort func by implementing the sort package interface "Interface"

The sort package allows us to sort slices

Main thing to note about arrays in Go is size is part of the type as illustrated below

Remember the Go Lang's Motto on Concurrency: "Share memory by communicating; Don't communicate by sharing memory."

A “mutex” is a mutual exclusion lock.

Race condition occurs when two parallely executing entities try to access the same shared memory for read/write operation.

Write a program to demonstrate anonymous struct

create a func with the identifier foo that returns an int create a func with the identifier bar that returns an int and a string call both funcs print out their results

create a type ​SQUARE create a type ​CIRCLE attach a method to each that calculates ​AREA​ and returns it create a type ​SHAPE​ that defines an interface as anything that has the ​AREA​ method create a func ​INFO​ which takes type shape and then prints the area create a value of type square create a value of type circle use func info to print the area of square use func info to print the area of circle

Create a func which returns a func Assign the returned func to a variable Call the returned func

create a person struct create a func called “changeMe” with a *person as a parameter change the value stored at the *person address create a value of type person & print out the value Call changeMe function

In addition to the main goroutine, launch two additional goroutines

Anonymous self executing functions

Call function is a function that's passed into another function as an argument.

Go functions may be closures.

A "defer" statement invokes a function whose execution is deferred to the moment the surrounding function returns, either because the surrounding function executed a return statement, reached the end of its function body, or because the corresponding goroutine is panicking.

Functions are first class types in Go.

In other words, what an interface tells a type is, "If you have methods that match my functions, then you are my type"

Recursion happens when a function calls itself.

Functions are first class types in Go and hence can be returned from a function just like any other type

When we have a slice of some type, we can pass in the individual values in a slice by using the “...” operator.

We can create a function which takes an unlimited number of arguments Parameter that can accept unlimited number of arguments is known as a “variadic parameter.” We use the lexical element operator ...T to specify variadic parameter of type T

Within a constant declaration, the predeclared identifier iota represents successive untyped integer constants.

Like slices, maps hold references to an underlying data structure.

IMPORTANT: “The method set of a type determines the INTERFACES

Go function signature func (r receiver) identifier(parameters) (return(s)) { code }

A pointer is a variable that holds the address of a memory location

A SLICE holds VALUES of the same TYPE.

* As we saw, indexing a string yields its bytes, not its characters: * a string is just a bunch of bytes.

Structs allow us to compose together values of different types.

* In Go, we don't need to add break in every switch case as we do in C/C++ * That's the default behavior.