Functions in GoLang

Introduction to Functions in the Go Programming Language

#golang #go

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Functions in GoLang
Vincent Lab

Vincent Lab

1605017502

The Difference Between Regular Functions and Arrow Functions in JavaScript

Other then the syntactical differences. The main difference is the way the this keyword behaves? In an arrow function, the this keyword remains the same throughout the life-cycle of the function and is always bound to the value of this in the closest non-arrow parent function. Arrow functions can never be constructor functions so they can never be invoked with the new keyword. And they can never have duplicate named parameters like a regular function not using strict mode.

Here are a few code examples to show you some of the differences
this.name = "Bob";

const person = {
name: “Jon”,

<span style="color: #008000">// Regular function</span>
func1: <span style="color: #0000ff">function</span> () {
    console.log(<span style="color: #0000ff">this</span>);
},

<span style="color: #008000">// Arrow function</span>
func2: () =&gt; {
    console.log(<span style="color: #0000ff">this</span>);
}

}

person.func1(); // Call the Regular function
// Output: {name:“Jon”, func1:[Function: func1], func2:[Function: func2]}

person.func2(); // Call the Arrow function
// Output: {name:“Bob”}

The new keyword with an arrow function
const person = (name) => console.log("Your name is " + name);
const bob = new person("Bob");
// Uncaught TypeError: person is not a constructor

If you want to see a visual presentation on the differences, then you can see the video below:

#arrow functions #javascript #regular functions #arrow functions vs normal functions #difference between functions and arrow functions

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Road to Golang pro — Pointer & Functions

A few words before we start. You can find the code used in this tutorial in this repository. You can find the full contents of Road to Go Pro here. If you missed the last one, you can find it via this link.

We talked about flow controls and loops in the last part of the tutorial. In this one, we will cover pointers and functions. After finishing the first 4 parts of Road to Go Pro, you are well equipped to start writing scripts or console applications using Go.

Pointers

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Photo by Nathalie SPEHNER on Unsplash

If you have used C or C++, you already know what’s a pointer. However, in the most popular programming languages like Java, C#, Javascript, Python, etc. there’s no explicit syntax to represent pointers. I had no idea what it is when I first heard of this name.

In short, a pointer holds the underlying memory address of a value. Whoa, hold on, memory address? Isn’t Go a high-level programming language?

When do we even need to know about the memory addresses of variables?

That’s a good question but before exploring the answer, we need to take a quick detour. Let’s see how to declare pointers and how to use them in functions. Once we have covered these, it will be easier for you to understand the reasoning and examples below. So hang in there.

Declaring pointers

Whenever we declare a variable in Go, the compiler allocates a segment of memory to store it. The value of that variable is stored there until it is recycled by the garbage collector.

Pointers are composite data types. We form a pointer type by adding an * in front of the data type it points to. For instance, *string represents the type of a pointer pointing to a string-type variable.

To get the pointer value of an existing variable, we need to add an & in front of the variable.

#golang #go #golang-tutorial #golang-development

Tia  Gottlieb

Tia Gottlieb

1598258520

Activation Functions, Optimization Techniques, and Loss Functions

Activation Functions:

A significant piece of a neural system Activation function is numerical conditions that decide the yield of a neural system. The capacity is joined to every neuron in the system and decides if it ought to be initiated (“fired”) or not, founded on whether every neuron’s info is applicable for the model’s expectation. Initiation works likewise help standardize the yield of every neuron to a range somewhere in the range of 1 and 0 or between — 1 and 1.

Progressively, neural systems use linear and non-linear activation functions, which can enable the system to learn complex information, figure and adapt practically any capacity speaking to an inquiry, and give precise forecasts.

Linear Activation Functions:

**Step-Up: **Activation functions are dynamic units of neural systems. They figure the net yield of a neural node. In this, Heaviside step work is one of the most widely recognized initiation work in neural systems. The capacity produces paired yield. That is the motivation behind why it is additionally called paired advanced capacity.

The capacity produces 1 (or valid) when info passes edge limit though it produces 0 (or bogus) when information doesn’t pass edge. That is the reason, they are extremely valuable for paired order studies. Every rationale capacity can be actualized by neural systems. In this way, step work is usually utilized in crude neural systems without concealed layer or generally referred to name as single-layer perceptions.

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