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Exploring JavaScript console.log object

TheDailyTechTalk — Sun, 01 May 2022 10:20:41 +0000

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JavaScript Console

The console object provides access to the browser's debugging console (e.g. the Web console in Firefox). The specifics of how it works varies from browser to browser, but there is a de facto set of features that are typically provided.

Most developers usually use console.log() to debug JavaScript code, but console provides us with such a powerful set of features it would be shame not to use them, or at least know what they do.

console.log() For general output of logging information.
console.info() Informative logging of information.
console.warn() Outputs a warning message.
console.error() Outputs an error message to the Web console.

Using other logging besides console.log() will provide you with more informative and clearer logs.

Lets start by exploring console object

As we can see Console object has plenty of methods. Lets explore some of more useful ones.

console.clear()

The console.clear() clear the console.

console.dir()

console.log() prints the object in its string representation while console.dir() recognizes the object as an object and prints it’s properties in the form of a clean expandable list.

const dog = {name: 'Rex', age: 7, friends: ['cat', 'dog', 'duck']};
console.dir(dog);

console.table()

With console.table() we can create beautiful tables. This is probably my favourite console method.

console.time(), console.timeLog() and console.timeEnd()

Use console.time() to start a timer.
Use console.timeLog() to print time elapsed since the timer started.
Use console.timeEnd() to print the total amount of time since console.time() started.

console.group() and console.groupEnd()

The console.group() method creates a new inline group in the Web console log. This indents following console messages by an additional level, until console.groupEnd() is called.

console logging with CSS

This works with most console method such as .log(), .warn(), .error() etc.

Please note that we have to use '%c' for css to work!

console.log(
        "%cTheDailyTechTalk!",
        "color:red;font-family:system-ui;font-size:4rem;-webkit-text-stroke: 1px black;font-weight:bold"
      );

I recently started a new blog TheDailyTechTalk where I create free content. If you liked this post and would like to read more posts about javascript please check it out 🎉🎉
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Top 10 Must Know JavaScript Functions!

TheDailyTechTalk — Tue, 14 Sep 2021 09:15:18 +0000

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Top 10 Must-Know JavaScript Functions

Please check out full article here

1 filter()

This function filters an array based on the condition you provide and it returns a new array which contains items which satisfy those conditions.

filter()

const temperatures = [10, 2, 30.5, 23, 41, 11.5, 3];

const coldDays = temperatures.filter(dayTemperature => {
    return dayTemperature < 20;
});

console.log("Total cold days in week were: " + coldDays.length); // 4

2 map()

Function map() is a very simple, it loops over an array and convert each item into something else.

const readings = [10, 15, 22.5, 11, 21, 6.5, 93];
const correctedReadings = readings.map(reading => reading + 1.5);
console.log(correctedReadings); // gives [11.5, 16.5, 24, 12.5, 22.5, 8, 94.5]

3 some()

some() is very similar to filter() , but some() returns boolean instead.

const animals = [
    {
        name: 'Dog',
        age: 2
    },

    {
        name: 'Cat',
        age: 8
    },

     {
        name: 'Sloth',
        age: 6
    },
];

if(animals.some(animal => {
    return animal.age > 4
})) {
    console.log("Found some animals!")
}

4 every()

every() is also very similar to some() , but every() true only if every single element in array satisfy our condition.

const isBelowThreshold = (currentValue) => currentValue < 40;

const array1 = [1, 30, 39, 29, 10, 13];

console.log(array1.every(isBelowThreshold));   // true

5 shift()

The shift() method removes the first element from an array and returns removed element. This method changes the length of the array.

const items = ['meat', 'carrot', 'ham', 'bread', 'fish'];
items.shift()
console.log(items); // ['carrot', 'ham', 'bread', 'fish']

6 unshift()

Just like shift() method removes the first element from an array unshift() adds it. This method changes the length of the array and returns the new length of the array as result.

const items = ['milk', 'fish'];
items.unshift('cookie')
console.log(items); // ['cookie', 'milk', 'fish']

7 slice()

The slice() method returns a shallow copy of a portion of an array into a new array object selected from start to end (end not included) where start and end represent the index of items in that array. The original array will not be modified.

let message = "The quick brown fox jumps over the lazy dog";
let startIndex = message.indexOf('brown');
let endIndex = message.indexOf('jumps');
let newMessage = message.slice(startIndex, endIndex);
console.log(newMessage); // "brown fox "

8 splice()

splice() below start at index 2 (the third place, count starts from 0!! ) of the array, and remove one item.
In our array that would mean that "rabbit" got removed. splice() will return new array as result.

const animals = ['dog', 'cat', 'rabbit', 'shark', 'sloth'];
animals.splice(2, 1);
console.log(animals); // ["dog", "cat", "shark", "sloth"]

9 includes()

includes() will check every item in the array, and check if any of them includes our condition. It will return boolean.

const array1 = [1, 2, 3];

console.log(array1.includes(2));
// expected output: true

const pets = ['cat', 'dog', 'bat'];

console.log(pets.includes('cat'));  //  true

console.log(pets.includes('at'));  //  false

10 reverse()

reverse() method reverses an array. Be careful since reverse() is destructive which means it changes the original array.

const array1 = ['one', 'two', 'three', 'four'];
console.log(array1);  //  ["one", "two", "three", "four"]

const reversed = array1.reverse();
console.log(reversed);  //  ["four", "three", "two", "one"]

I recently started a new blog TheDailyTechTalk where I create free content. If you liked this post and would like to read more posts about JavaScript please check it out 🎉🎉
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Exploring JavaScript console object and logging!

TheDailyTechTalk — Tue, 14 Sep 2021 09:12:27 +0000

If you like what I write and want to support me, please follow me on Twitter to learn more about programming and similar topics ❤️❤️

JavaScript Console

The console object provides access to the browser's debugging console (e.g. the Web console in Firefox). The specifics of how it works varies from browser to browser, but there is a de facto set of features that are typically provided.

Most developers usually use console.log() to debug JavaScript code, but console provides us with such a powerful set of features it would be shame not to use them, or at least know what they do.

console.log() For general output of logging information.
console.info() Informative logging of information.
console.warn() Outputs a warning message.
console.error() Outputs an error message to the Web console.

Using other logging besides console.log() will provide you with more informative and clearer logs.

Lets start by exploring console object

As we can see Console object has plenty of methods. Lets explore some of more useful ones.

console.clear()

The console.clear() clear the console.

console.dir()

console.log() prints the object in its string representation while console.dir() recognizes the object as an object and prints it’s properties in the form of a clean expandable list.

const dog = {name: 'Rex', age: 7, friends: ['cat', 'dog', 'duck']};
console.dir(dog);

console.table()

With console.table() we can create beautiful tables. This is probably my favourite console method.

console.time(), console.timeLog() and console.timeEnd()

Use console.time() to start a timer.
Use console.timeLog() to print time elapsed since the timer started.
Use console.timeEnd() to print the total amount of time since console.time() started.

console.group() and console.groupEnd()

The console.group() method creates a new inline group in the Web console log. This indents following console messages by an additional level, until console.groupEnd() is called.

console logging with CSS

This works with most console method such as .log(), .warn(), .error() etc.

Please note that we have to use '%c' for css to work!

console.log(
        "%cTheDailyTechTalk!",
        "color:red;font-family:system-ui;font-size:4rem;-webkit-text-stroke: 1px black;font-weight:bold"
      );

I recently started a new blog TheDailyTechTalk where I create free content. If you liked this post and would like to read more posts about javascript please check it out 🎉🎉
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Selecting low power networking — LoraWan,SigFox, Nb-IoT and LTE-M

TheDailyTechTalk — Tue, 14 Sep 2021 07:06:32 +0000

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Selecting low power networking contrasting pros and cons of LoraWan,SigFox, Nb-IoT and LTE-M

What is "Low power wide area network"?

LPWAN is a type of wireless telecommunication designed for long-range communications between IoT devices, sensors etc. Its main purpose is to send small amounts of data over a great distance for a long period of time, even years on a single battery*.* Coverage can range from 1 km up to over 40 km.

Frequency which LPWAN providers like SigFox or LoraWaN use depends on location (and sometimes even the country). Providers use either unlicensed ISM bands , 868 MHz in Europe, 915 Mhz in North America and 433 MHz in Asia, or licensed LTE frequency bands.

The respective advantages of Sigfox, LoRaWAN, and NB-IoT. Source: The Korean Institute of Communications and Information Sciences (KICS) as published in ICT Express, March 2019.

SigFox

Sigfox was founded in 2009 in France.Today they are available in over 60 countries and their numbers are constantly growing. They offer end-to-end LPWAN solutions. Sigfox network architecture is built using base stations in a star topology, but with their own cloud service acting as a middle man. That kind of architecture offers some great benefits such as data security and data flow via API.

Pros:

Strong industry support and partners like Texas Instruments, Silicon Labs and Arduino
Very long range
Large coverage
Cost effective
Cloud service & API
Easy to integrate with services like AWS, Azure and others

Cons:

Not an open standard
Low security (16 bit encryption)
US design architecture is different from European architecture
Bad UI/UX in administration interface
Bad latency performance
Low maximum payload length
Limited amount of UL / DL
No private networks

LoRaWaN

LoRaWaN network architecture is deployed as a typical star topology, with a gateway in the middle that converts radio signal to IP and vice versa. They are mainly used for telemetric data transfers and object tracking. Messages transmitted by an end device with LoRaWAN are received by all base stations in the range, which increases the ratio of successfully received messages. However, that requires multiple base stations in range, as well as the need to filter duplicated messages, which leads to increased network deployment cost.

Pros:

Strong industry support and partners such as Cisco, IBM and KPN
Strong security (128 bit encryption) and authentication (2 layers of security)
Great for communication with moving devices, since it is resistant to the Doppler effect
Unlimited uplinks and downlinks
Multiple classes of end devices for different requirements and situations

Cons:

Not an open standard
The price and availability of the modules
You can only use vendors approved by Semtech
Expensive device certification required for most device types

NB-IoT

NB-IoT , which stands for Narrowband Internet of Things, uses licensed frequency spectrum, unlike SigFox and LoRa. Their communication protocol is based on the LTE protocol and it can coexist with both GSM and LTE protocols. NB-IoT frequency band width is 200 KHz, and because of that there are 3 operation modes possible: stand-alone operation which utilizes GSM frequency bands currently in use, guard-band operation that utilizes unused resource blocks within LTE band and in-band operation which utilizes resource blocks within an LTE carrier.

Pros:

Big data rate (200 kbps)
Large maximum payload length (1600) bytes
LTE encryption
Scalability
Latency performance

Cons:

No private networks
Low coverage
Cost efficiency
Lower range than its competitors
Low interference immunity

LTE-M

CAT-M, officially known as LTE CAT-M1, is the second generation of LTE chips developed by 3GPP. As well as coexisting with 2G, 3G and 4G mobile networks , LTE-M network benefits from their security, privacy and other features. Unlike the rest of the world where GSM spectra are the norm, US service providers have system architecture for LTE-M.

Pros:

Compatible with existing LTE network.
High data rate
Support of voice functionality via VoLTE
Low power consumption
Use of TCP / IP protocols
Easy to deploy
Supports mobility, no disconnections while moving between stations
Low latency

Cons:

Firmware upgrades consume power
High costs
Bandwidth consumption
Low support outside USA

I recently started a new blog TheDailyTechTalk where I create free content. If you liked this post and would like to read more posts about javascript please check it out 🎉🎉
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Best VS Code extensions to increase your productivity

TheDailyTechTalk — Tue, 14 Sep 2021 06:48:20 +0000

I recently started a new blog TheDailyTechTalk where I create free content. If you liked this post and would like to read more posts about javascript please check it out 🎉🎉
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Bracket Pair Colorizer

With over 5.8 million downloads, Bracket Pair Colorizer is definitely one of the most popular VS Code extensions out there.
This extension allows matching brackets to be identified with colours. It is highly customizable and with a lot of configuration options.
Simply mind blowing extension.

Check it out here.

Prettier - Code formatter

Prettier - Code formatter With more then 14.3 million downloads this is definitely one of the best VS Code extensions.

Prettier is an code formatter which enforces a consistent style by parsing your code and re-printing it with its own rules that take the maximum line length into account, wrapping code when necessary etc. It is highly configurable to better fit your and your teams coding style.

Check it out here.

Auto Rename Tag

Auto Rename Tag is a super useful VS Code extension for web developers. As the names suggest, Auto Rename Tag renames the second tag as the first one is updated and vice versa. Really useful for writing HTML, React or Vue.

Check it out here.

Ponicode

Ponicode is an AI-powered extension pack that generates unit tests.

AI shows you what functions need to be tested the most and
it handles repetitive part of unit testing, by writing the test file for you.
It also generates and suggests you relevant inputs for your tests scenarios.

Supports

Typescript
JavaScript
Python

Check it out here..

ESLint

With this plugin, you can code with ease knowing that you will maintain correct code etiquette make things easier to read, both for yourself and others.It is really easy to customise, simply modify Json settings file according to your needs.

Check it out here..

I recently started a new blog TheDailyTechTalk where I create free content. If you liked this post and would like to read more posts about javascript please check it out 🎉🎉
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Part 1: Short introduction to RabbitMQ

TheDailyTechTalk — Sun, 12 Sep 2021 08:05:29 +0000

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In this blog post, we are going to cover an overview of what RabbitMQ is and give an example of when you would apply this technology.

What is RabbitMQ?

RabbitMq is an open source message broker software. sometimes called message-oriented middleware, that originally implemented the Advanced Message Queuing Protocol or >AMQp for short, and has since been extended with a plug-in architecture to support Streaming Text Oriented Messaging Protocol (STOMP), Message Queuing Telemetry >Transport (MQTT), and other protocols.

The simplest way of putting it would be RabbitMQ is used to distribute long-running task that doesn’t require immediate user feedback into a separate process.

Now since we have a good understanding of the definition let’s dive deep into the components of RabbitMq, it’s topology and how we can use it.

RabbitMq has 5 different exchanges:

Direct exchange
Fanout exchange
Header exchange
Dead Letter exchange
Topic exchange

Basic components of RabbitMq

Exchanges

Exchange	Description
Direct	Direct exchange delivers messages to queues based on a message routing key.
Fanout	Fanout exchange routes messages to all of the queues that are bound to it and the routing key is ignored.
Header	Headers exchange routes messages based on arguments containing headers and optional values. Headers exchanges are very similar to topic exchanges, but route messages based on header values instead of routing keys.
Dead Letter Exchange	Provides the functionality to capture messages that are not deliverable.
Topic	Topic exchanges route messages to queues based on wildcard matches between the routing key and the routing pattern, which is specified by the queue binding. Messages are routed to one or many queues based on a matching between a message routing key and this pattern.

Components

Exchange	Description
Binding	Binding is a “link” that you set up to bind a queue to an exchange.
Routing key	Routing key The routing key is a message attribute. The exchange might look at this key when deciding how to route the message to queues (depending on exchange type).
Producers	Job of the producer is to send a new message to the exchange.
Message	Message represents value you want the consumer to recieve and process.
Queue	Queues are ordered collections of messages.
Exchange	Exchange routes the message to the right queue.
Consumers	Consumers is a client that receives messages.

Direct exchange

A direct exchange delivers messages to queues based on a message routing key. The routing key is a message attribute added to the message header by the producer. Think of the routing key as an "address" that the exchange is using to decide how to route the message. A message goes to the queue(s) with the binding key that exactly matches the routing key of the message.

Fanout exchange

A fan-out topology is when the producer sends a message to the exchange and the exchanges ignore the routing key and just sends the task directly to all of the queues that are available.

Topic exchange

The logic behind the topic exchange is similar to a direct one - a message sent with a particular routing key will be delivered to all the queues that are bound with a matching binding key. There are two important special cases for binding keys:

* can substitute for exactly one word.
# can substitute for zero or more words.

Dead Letter exchange

There are three identified situations where a message becomes undeliverable after reaching RabbitMQ:

A message is negatively acknowledged by the consumer
The TTL of a message expires
The queue reaches capacity

By default, the broker drops these messages. Publishing is successful, however, the RabbitMQ consumer never handles or has a change to handle the message successfully.

Queues attached to a dead letter exchange collect dropped messages, with the next steps determined by developer. In other words - it's up to you to decide how to handle messages in the dead letter queue. When implemented correctly, information is almost never lost.

Header exchange

Headers exchange is an exchange which route messages to queues based on message header values instead of routing key. Producer adds some values in a form of key-value pair in message header and sends it to headers exchange. After receiving a message, exchange try to match all or any (based on the value of “x-match”) header value with the binding value of all the queues bound to it.

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Exploring JavaScript console object and logging!

TheDailyTechTalk — Thu, 19 Aug 2021 12:47:29 +0000

If you like what I write and want to support me, please follow me on Twitter to learn more about programming and similar topics ❤️❤️

JavaScript Console

The console object provides access to the browser's debugging console (e.g. the Web console in Firefox). The specifics of how it works varies from browser to browser, but there is a de facto set of features that are typically provided.

Most developers usually use console.log() to debug JavaScript code, but console provides us with such a powerful set of features it would be shame not to use them, or at least know what they do.

console.log() For general output of logging information.
console.info() Informative logging of information.
console.warn() Outputs a warning message.
console.error() Outputs an error message to the Web console.

Using other logging besides console.log() will provide you with more informative and clearer logs.

Lets start by exploring console object

As we can see Console object has plenty of methods. Lets explore some of more useful ones.

console.clear()

The console.clear() clear the console.

console.dir()

console.log() prints the object in its string representation while console.dir() recognizes the object as an object and prints it’s properties in the form of a clean expandable list.

const dog = {name: 'Rex', age: 7, friends: ['cat', 'dog', 'duck']};
console.dir(dog);

console.table()

With console.table() we can create beautiful tables. This is probably my favourite console method.

console.time(), console.timeLog() and console.timeEnd()

Use console.time() to start a timer.
Use console.timeLog() to print time elapsed since the timer started.
Use console.timeEnd() to print the total amount of time since console.time() started.

console.group() and console.groupEnd()

The console.group() method creates a new inline group in the Web console log. This indents following console messages by an additional level, until console.groupEnd() is called.

console logging with CSS

This works with most console method such as .log(), .warn(), .error() etc.

Please note that we have to use '%c' for css to work!

console.log(
        "%cTheDailyTechTalk!",
        "color:red;font-family:system-ui;font-size:4rem;-webkit-text-stroke: 1px black;font-weight:bold"
      );

I recently started a new blog TheDailyTechTalk where I create free content. If you liked this post and would like to read more posts about javascript please check it out 🎉🎉
🥰

Top 10 Must Know JavaScript Functions!

TheDailyTechTalk — Sat, 14 Aug 2021 19:33:42 +0000

I recently started a new blog TheDailyTechTalk where I create free content. If you liked this post and would like to read more posts about javascript please check it out 🎉🎉
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If you like what I write and want to support me, please follow me on Twitter to learn more about programming and similar topics ❤️❤️

Top 10 Must-Know JavaScript Functions

Please check out full article here

1 filter()

This function filters an array based on the condition you provide and it returns a new array which contains items which satisfy those conditions.

filter()

const temperatures = [10, 2, 30.5, 23, 41, 11.5, 3];

const coldDays = temperatures.filter(dayTemperature => {
    return dayTemperature < 20;
});

console.log("Total cold days in week were: " + coldDays.length); // 4

2 map()

Function map() is a very simple, it loops over an array and convert each item into something else.

const readings = [10, 15, 22.5, 11, 21, 6.5, 93];
const correctedReadings = readings.map(reading => reading + 1.5);
console.log(correctedReadings); // gives [11.5, 16.5, 24, 12.5, 22.5, 8, 94.5]

3 some()

some() is very similar to filter() , but some() returns boolean instead.

const animals = [
    {
        name: 'Dog',
        age: 2
    },

    {
        name: 'Cat',
        age: 8
    },

     {
        name: 'Sloth',
        age: 6
    },
];

if(animals.some(animal => {
    return animal.age > 4
})) {
    console.log("Found some animals!")
}

4 every()

every() is also very similar to some() , but every() true only if every single element in array satisfy our condition.

const isBelowThreshold = (currentValue) => currentValue < 40;

const array1 = [1, 30, 39, 29, 10, 13];

console.log(array1.every(isBelowThreshold));   // true

5 shift()

The shift() method removes the first element from an array and returns removed element. This method changes the length of the array.

const items = ['meat', 'carrot', 'ham', 'bread', 'fish'];
items.shift()
console.log(items); // ['carrot', 'ham', 'bread', 'fish']

6 unshift()

Just like shift() method removes the first element from an array unshift() adds it. This method changes the length of the array and returns the new length of the array as result.

const items = ['milk', 'fish'];
items.unshift('cookie')
console.log(items); // ['cookie', 'milk', 'fish']

7 slice()

let message = "The quick brown fox jumps over the lazy dog";
let startIndex = message.indexOf('brown');
let endIndex = message.indexOf('jumps');
let newMessage = message.slice(startIndex, endIndex);
console.log(newMessage); // "brown fox "

8 splice()

const animals = ['dog', 'cat', 'rabbit', 'shark', 'sloth'];
animals.splice(2, 1);
console.log(animals); // ["dog", "cat", "shark", "sloth"]

9 includes()

includes() will check every item in the array, and check if any of them includes our condition. It will return boolean.

const array1 = [1, 2, 3];

console.log(array1.includes(2));
// expected output: true

const pets = ['cat', 'dog', 'bat'];

console.log(pets.includes('cat'));  //  true

console.log(pets.includes('at'));  //  false

10 reverse()

reverse() method reverses an array. Be careful since reverse() is destructive which means it changes the original array.

const array1 = ['one', 'two', 'three', 'four'];
console.log(array1);  //  ["one", "two", "three", "four"]

const reversed = array1.reverse();
console.log(reversed);  //  ["four", "three", "two", "one"]

I recently started a new blog TheDailyTechTalk where I create free content. If you liked this post and would like to read more posts about javascript please check it out 🎉🎉
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5 Best VS Code extensions to increase your productivity

TheDailyTechTalk — Sat, 14 Aug 2021 14:44:59 +0000

I recently started a new blog TheDailyTechTalk where I create free content. If you liked this post and would like to read more posts about javascript please check it out 🎉🎉
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If you like what I write and want to support me, please follow me on Twitter to learn more about programming and similar topics ❤️❤️

Bracket Pair Colorizer

Check it out here.

Prettier - Code formatter

Prettier - Code formatter With more then 14.3 million downloads this is definitely one of the best VS Code extensions.

Check it out here.

Auto Rename Tag

Check it out here.

Ponicode

Ponicode is an AI-powered extension pack that generates unit tests.

Supports

Typescript
JavaScript
Python

Check it out here..

ESLint

Check it out here..

I recently started a new blog TheDailyTechTalk where I create free content. If you liked this post and would like to read more posts about javascript please check it out 🎉🎉
🥰

If you like what I write and want to support me, please follow me on Twitter to learn more about programming and similar topics ❤️❤️

Selecting low power networking — LoraWan,SigFox, Nb-IoT and LTE-M

TheDailyTechTalk — Mon, 09 Aug 2021 18:54:43 +0000

Selecting low power networking contrasting pros and cons of LoraWan,SigFox, Nb-IoT and LTE-M

What is "Low power wide area network"?

The respective advantages of Sigfox, LoRaWAN, and NB-IoT. Source: The Korean Institute of Communications and Information Sciences (KICS) as published in ICT Express, March 2019.

SigFox

Pros:

Strong industry support and partners like Texas Instruments, Silicon Labs and Arduino
Very long range
Large coverage
Cost effective
Cloud service & API
Easy to integrate with services like AWS, Azure and others

Cons:

Not an open standard
Low security (16 bit encryption)
US design architecture is different from European architecture
Bad UI/UX in administration interface
Bad latency performance
Low maximum payload length
Limited amount of UL / DL
No private networks

LoRaWaN

Pros:

Strong industry support and partners such as Cisco, IBM and KPN
Strong security (128 bit encryption) and authentication (2 layers of security)
Great for communication with moving devices, since it is resistant to the Doppler effect
Unlimited uplinks and downlinks
Multiple classes of end devices for different requirements and situations

Cons:

Not an open standard
The price and availability of the modules
You can only use vendors approved by Semtech
Expensive device certification required for most device types

NB-IoT

Pros:

Big data rate (200 kbps)
Large maximum payload length (1600) bytes
LTE encryption
Scalability
Latency performance

Cons:

No private networks
Low coverage
Cost efficiency
Lower range than its competitors
Low interference immunity

LTE-M

Pros:

Compatible with existing LTE network.
High data rate
Support of voice functionality via VoLTE
Low power consumption
Use of TCP / IP protocols
Easy to deploy
Supports mobility, no disconnections while moving between stations
Low latency

Cons:

Firmware upgrades consume power
High costs
Bandwidth consumption
Low support outside USA