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Introduction to PostgreSQL STRING_AGG()

PostgreSQL supports various kinds of aggregate functions, The STRING_AGG() function is one of the aggregate functions which is used to concatenate the list of strings, and it will add a place to a delimiter symbol or a separator between all of the strings. The separator or a delimiter symbol will not be included at the end of the output string. The PostgreSQL STRING_AGG() function is supported by PostgreSQL 9.0 version, which performs the aggregate option related to the string. We can use various separators or delimiter symbols to concatenate the strings.

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Syntax

Explanation:

The STRING_AGG() function takes input ORDER BY clause is an optional and other two arguments as follows:

expression: This is a character string that is any valid expression.

separator/delimiter: This defines the separator/delimiter used for string concatenation.

The ORDER BY clause is optional and defines the order of concatenated string results.

The ORDER BY has the syntax as follows:

How does PostgreSQL STRING_AGG() function works?

The input expression needed should be a character string data type. We can also use other data types but only need to ensure that we have explicitly cast other data types to the character string data type.

The PostgreSQL STRING_AGG() returns us the result in string type.

The STRING_AGG() is generally used with the GROUP BY clause like we use other PostgreSQL aggregate functions such as MIN(), MAX(), AVG(), SUM(), COUNT(), etc.

Examples to Implement PostgreSQL STRING_AGG() function

We will create a table named ‘student’ and ‘course’ by using the CREATE TABLE statement as follows:

STUDENT TABLE:

create table student ( stud_id serial PRIMARY KEY, stud_name VARCHAR(80) NOT NULL, stud_grade CHAR(1) NOT NULL, stud_country VARCHAR(80) NOT NULL, course_id int NOT NULL );

COURSE TABLE:

create table course ( course_id serial PRIMARY KEY, course_name VARCHAR(80) NOT NULL );

Now, we will insert some data into the ‘course’ table by using the INSERT INTO statement as follows:

INSERT INTO course(course_name) VALUES ('Computer'), ('Mechanical'), ('Civil'), ('Electrical');

Illustrate the above INSERT statement’s result using the following SQL statement and snapshot.

select * from course;

INSERT INTO student(stud_name,stud_grade,stud_country,course_id) VALUES ('Smith','A','USA',1), ('Johnson','B','USA',2), ('Williams','C','USA',3), ('Jones','C','Canada',1), ('Brown','B','Canada',2), ('Davis','A','Canada',3), ('Aarnav','A','India',1), ('Aarush','B','India',2), ('Aayush','C','India',3), ('Abdul','C','UAE',1), ('Ahmed','A','UAE',3), ('Ying', 'A','China',1), ('Yue','B','China',2), ('Feng', 'C','China',3), ('Mian','C','South Korea',1), ('Fei','B','South Korea',2), ('Hong','A','South Korea',3);

Illustrate the above INSERT statement’s result using the following SQL statement and snapshot.

select * from student;

SELECT c.course_name AS "course name", s.stud_name AS "student name" FROM course c RIGHT JOIN student s ON c.course_id = s.course_id ORDER BY 1;

Illustrate the result of the above statement by using the following snapshot.

We can concatenate the student names by using the STRING_AGG() function by modifying the above SQL statement as follows:

SELECT crs.course_name AS "course name", string_agg(stud.stud_name, ', ') AS "student list" FROM course crs JOIN student stud ON crs.course_id = stud.course_id GROUP BY 1 ORDER BY 1;

Illustrate the result of the above statement by using the following snapshot.

SELECT  stud_grade, STRING_AGG(stud_name,', ') AS StudentsPerGrade FROM student GROUP BY stud_grade ORDER BY 1 ;

Illustrate the result of the above statement by using the following snapshot.

In the above example, the resulting snapshot shows us the students concatenated by a comma separator with a similar grade obtained.

SELECT STRING_AGG(stud_name, ', ') AS "student_names", stud_country FROM student GROUP BY stud_country;

Illustrate the result of the above statement by using the following snapshot.

In the above example, we observe that the code groups and concatenates all students from the same country, utilizing a comma separator.

Advantages

We can control the order of the result by using the ORDER BY clause.

The PostgreSQL STRING_AGG() function returns the result in string format.

We can use the STRING_AGG() function to concatenate all strings and add a delimiter symbol or separator between them.

The PostgreSQL STRING_AGG() supports various types of delimiter symbols or separators and does not include delimiter symbols or separators at the end of the string.

Conclusion

From the above article, we hope you understand how to use the PostgreSQL STRING_AGG() function and how the PostgreSQL STRING_AGG() function works. Also, we have added several examples of the PostgreSQL STRING_AGG() function to understand it in detail.

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Advantages , Disadvantages And Examples

Definition of Inventories List

The inventories list comprises line-item details of all the items of the stock of the company. It is a technique to have more control over inventory management and helps efficiently utilize the inventory. The list is updated from time to time, the frequency of which is dependent upon the type of the business.

Explanation

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It provides accurate and readily available stock details, which helps management make decisions and smooth business operations. Suppose the business comprises inventory that moves swiftly. In that case, the inventory should be updated daily, but in case of the slow movement of inventory, the business can update it weekly or monthly.

Examples of Inventories List

Inventory ID

Name

Description

Unit Price in $

Quantity in stock

Inventory Value in $

Reorder level

IN0001 ABC CBA 4.00 50.00 200 30 11

IN0002 DEF FED 2.00 40.00 80 25 3

IN0003 GHI IHG 1.00 100.00 100 70 10

IN0004 JKL LKJ 3.00 120.00 360 70 13

IN0005 MNP PNM 6.00 70.00 420 40 6

IN0006 OQR RQO 8.00 80.00 640 40 6

Components of Inventories List

The components of the inventories list given in the above template are explained below. Though there is no strict format that is followed across the companies, the below components are more or less present in every inventories list:

Inventory ID: It is a unique code assigned to each item in the inventory, which serves as its identifier in the inventory management system.

Name: The field represents the name of the particular inventory item.

Description: Description specifies the details of the inventory item, such as its specifications, color, measurement, etc., which can help in its identification later on.

Unit price: It indicates the purchase price of a particular item per unit basis.

Quantity in stock: The field represents the remaining quantity in the stock. It serves as a basis for reorder level and helps decide when a particular inventory item needs reordered.

Inventory value: This indicates the total value of the inventory in the stock i.e. product of the quantity of an item and its unit price.

Reorder level: If an item reaches the reorder level, the order will be placed with the vendor again. The order is automatically placed at the reorder level if the inventory management system software is in place.

Reorder time in days: This suggests the time lag between the placing of reorder and its physical receipt.

Advantages of Inventories List

Inventories list helps in the controlled management of the inventory.

The list helps track the inventory items in case of return of defective merchandise, multiple suppliers, and impacted items in case of a recall.

It also helps clearly categorize inventory since it contains useful information such as item number, description, etc.

Inventories list helps in the effective utilization of items in stock. Also, it helps in avoiding overstocking positions and shortage conditions.

Nowadays, companies use computer software to manage inventory or prepare inventories list, which is quite expensive, while manual intervention requires a lot of effort and is prone to errors.

Inventories list can be a little complex to be prepared through software, while manually, it can be cumbersome due to a lot of data.

Conclusion

Since inventory is an integral part of every business, an inventory list for managing inventory is also important. An inventory list prepared through inventory management software helps smooth business operations. Though the inventory list is data-intensive and prone to errors in the case of manual intervention, its usefulness overshadows all of its negatives.

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Learn The Examples For Implementation

Introduction to PostgreSQL REGEXP_REPLACE

The regular expression is a sequence of characters, the short name for the list of strings. If any string matches with any of the strings, which is part of a list of the strings defined by the regular expression. PostgreSQL supports the regular expression, and the function provided by PostgreSQL is used to replace substrings with a new substring that matches a POSIX regular expression. The PostgreSQL REGEXP_REPLACE() function uses a POSIX regular expression pattern.

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Syntax:

REGEXP_REPLACE(input_string, regex_pattern, replace_string,[, flags])

Explanation:

input_string: This defines the input string in which replacement should be taken place for a specified pattern, a POSIX regular expression.

regex_pattern: This defines the POSIX regular expression to match the string.

flags: This flag is used to control the behavior of the REGEXP_REPLACE() function, This can have the value of one or more characters.

Replace_string: This string defines a string that replaces the substring, which matches the POSIX regular expression pattern.

Examples of PostgreSQL REGEXP_REPLACE

Here are the following examples of implementing the PostgreSQL REGEXP_REPLACE function

Consider the following name format like the first name and then last name:

‘Jacob David’

Suppose we want to re-arrange the last name and the first name for purposes like the last name and then the first name. So, we can use the PostgreSQL REGEXP_REPLACE() function to do this as follows:

SELECT REGEXP_REPLACE('Jacob David', '(.*) (.*)', '2, 1');

Illustrate the result of the above statement by using the following snapshot.

Example #2

Example, to remove the string, consider we have a string in the following as follows:

"xyz54321ABC"

Now, we will remove all alphabets characters from the above string by using the following statement:

SELECT REGEXP_REPLACE('xyz54321ABC', '[[:alpha:]]', '', 'g');

Illustrate the result of the above statement by using the following snapshot.

Now, we will remove all digits from the above string by using the following statement:

SELECT REGEXP_REPLACE('xyz54321ABC', '[[:digit:]]', '', 'g');

Illustrate the result of the above statement by using the following snapshot.

In the above examples, we have used the following regular expressions.

'[[:alpha:]]' '[[:digit:]]'

Also, we have used the replacement string as ‘’ and the flag ‘g’ we have used to instruct the PostgreSQL REGEXP_REPLACE function to replace all of the occurrences of the matched string and not just the first occurrence.

Example #3

Remove multiple occurrences of the spaces. Consider the following example, which removes more than one space that occurred in a string. Consider the following statement to do the same. 

SELECT REGEXP_REPLACE('PostgreSQL  is    awesome   database', '( ){2,}', ' ', 'g');

Illustrate the result of the above statement by using the following snapshot.

Example #4

We will create a table named ‘student’ by using the CREATE TABLE statement as follows:

create table student ( stud_id serial PRIMARY KEY, stud_fname VARCHAR(80) NOT NULL, stud_lname VARCHAR(80) NOT NULL );

Now, we will insert some data into the student table by using the INSERT INTO statement as follows

INSERT INTO student(stud_fname,stud_lname) VALUES ('Smith','Johnson'), ('Williams','Jones'), ('Brown','Davis');

Illustrate the above INSERT statement’s result using the following SQL statement and snapshot.

select * from student;

Consider the following SQL statement where we are checking whether the stud_lname is having ‘Jo’ substring, and if it exists, then we replace it with ‘K.’

SELECT REGEXP_REPLACE(stud_lname , 'Jo', 'K') AS "New Name" FROM student;

Also, consider the other example,

Consider the following SQL statement where we are checking whether the stud_lname is having ‘s’ substring, and if it exists, then we replace it with ‘K’

SELECT REGEXP_REPLACE(stud_lname , 's', 'K') AS "New Name" FROM student;

Illustrate the result of the above SQL statement by using the following snapshot.

Advantages of using PostgreSQL REGEXP_REPLACE () function

1. The PostgreSQL REGEXP_REPLACE () function supports various flags,

Consider examples like:

flag ‘i’ : match case-insensitively

flag ‘g’: search globally for each occurrence.

2. The PostgreSQL REGEXP_REPLACE() replaces all occurrences of the substring with the new string.

3. We can use The PostgreSQL REGEXP_REPLACE() function, the substring in variable length or dynamic strings.

Conclusion

From the above article, we hope you understand how to use the PostgreSQL REGEXP_REPLACE() function and how the PostgreSQL REGEXP_REPLACE() function works. Also, we have added several examples of the PostgreSQL REGEXP_REPLACE() function to understand it in detail.

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Learn The Implementation Of Db2 Cast With Examples

Introduction to DB2 CAST

DB2 CAST is a function available in DB2 that is used for explicit conversion of the data type of a particular value to another datatype. DB2 comes with the default facility of trying to convert the datatypes of the values if they are not mentioned properly to an expected data type value in all the functions and the instructions that are issued and where there is a necessity of doing so. This is called implicit casting or conversion of a datatype. In this article, we will study how we can convert the value of one data type to another with the help of the CAST() function available in DB2, the syntax of the CAST() function, and the implementation with the help of certain examples.

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Syntax

CAST(any expression or value AS the required datatype)

In the above expression, the expression or value can be any field value of a particular table column or a constant value, or even a variable that holds a certain value. The required data type is the data type that you want the value mentioned as the expression to be converted to. We can specify any data type, we want the data to convert to such as int, string, etc.

Implicit casting in DB2 Examples

Consider the following example where we are trying to add 6 integer value with ‘16’ string value using the plus(+) operator and retrieve the result –

6 + ’16’ as result ;

The execution of the above query statement gives the following output with the resultant value being an integer which is 22. Over here, DB2 firstly converted the string ‘16’ to an integer value and then went for doing the addition.

Let us consider one more example where we will be using the concatenation operator which is a string operator and works only with string. When we use the same values specified in the above example 6 and ‘16’ which are an integer and a string, using the following query statement –

The execution of the above query statement gives the following output with the resultant value being a string which is 616. Over here, DB2 firstly converted the integer 6 to string value and then goes for doing the concatenation.

Now, let us see, how we can cast the values explicitly using the CAST() function. If the values cannot be cast by the DB2 due to incompatible type of values, it throws an error saying as shown in the below image –

Now, let us try to convert a decimal value to an integer value using the DB2 CAST() function which will do explicit datatype conversion for us. Consider the following query statement where we are trying to convert a decimal number 14.562 to and integer value to get a rounded whole number. We can do this by using the following query statement with the CAST() function in it –

The output of the above query statement is a rounded integer value of 14.562 which is 14 as shown below –

Now, consider a decimal number 16.5454 which we want to cast to a decimal number itself but a lower scale value to it. We can even do this by using the CAST() function and our query statement, in this case, will look as follows –

CAST ( 16.5454  DEC (4,2)) AS result;

The output of the above query statement’s execution is as shown below with the number rounded and cast to a decimal value of two places after a decimal point has a different scale than the original one –

Let us try to convert a value of the TIMESTAMP datatype to the TIME datatype, in order to get only the time value in the output. We will convert the current timestamp value to time using the cast function in the following query statement to retrieve the current time value of the system –

CAST (CURRENT TIMESTAMP AS TIME) as result;

The execution of the above query statement gives the following result where we get the value of the current time of the system from the current TIMESTAMP value which is as shown below –

We can even convert the current timestamp value to the date datatype in order to retrieve today’s date of my system and using the following query statement and the CAST() function –

CAST (CURRENT TIMESTAMP AS DATE) as result;

The output of the execution of the above query statement is as shown below with the date value in it which is the current system date.

Let us try one last example where we will cast the value of string data type to a DATE datatype explicitly by using the CAST() function in DB2 RDBMS. Let us consider a random date value say ‘2030-01-27’. We will try to convert this string to DATE datatype by using the following query statement –

CAST(‘2030-01-27’ AS DATE) result;

The output of the execution of the above query statement in DB2 DBMS gives the following resultant value with the date specified being cast to a DATE data type as shown below –

Conclusion

IN DB2 RDBMS, the datatypes are internally converted into required datatypes while using the functions and manipulations and while doing operations. However, if we want to explicitly convert a particular value to a required datatype then we can make use of the CAST() function to convert the value to a different datatype explicitly in DB2 RDBMS. We can convert the data type f the values to any in-built and user-defined datatype using the CAST() function.

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This is a guide to DB2 CAST. Here we discuss how we can convert the value of one data type to another with the help of the CAST() function. You may also look at the following article to learn more –

Working, Uses And Features With Advantages & Disadvantages

Introduction to Skencil How Does Skencil Works?

The present stable release of Skencil software is 0.6.17 and is used for various type of illustration work because it is vector graphics editing software.

We have many tools for doing different types of illustration work, transforming shapes and text, and many other vector art-related terms we can do in this software.

With transformation, we can also do scaling, rotating of all these objects.

We can also do color management tasks, such as you can blend with colors, fill gradient in any artwork, and some other color management-oriented work we can do.

Uses of Skencil

There is much use of skencil in different graphics related field, and as we know, Skencil is a vector graphics editor, so we use it for various types of vector art and editing work.

We can make a different type of art work by using shape tools and typographic by making a different type of transformation in text.

We also use it to export and import different types of file formats to make our work easy in this software.

Features of Skencil

We have many good features of this software, and it is necessary to understand them for getting more knowledge about this software.

The very first features of this software include that it has tools through which we can draw geometrical shapes such as we can draw a rectangle which you can convert into rounded corners rectangle for a different type of illustration work, you can draw circles, ellipse, pie circle by using the same tool for a curve or circular requirement in illustration, you can draw different anchor point curves which is Bezier curves and manipulate it according to work requirement with handling points.

The next important feature of this software is it can write ESP files in it to use this type of file to make our work easy with different features. We can also export and import different file format with an improved version of Skencil. Due to compatibility with the different file format, it makes our vector graphics editing more effective.

Advantages:

Skencil is based on Python, so it can extend in different ways, which starts from user scripts and goes up to plugins.

We have other plugin collections for skencil, such as Christof Ecker’s plugin for skencil, which offers graphs, Turtle Library, Transforms Scripts, and many more things to add new features to this software.

It offers plugins that help in the management of brightness and contrast of art work in this software as well as in the manipulation work of color.

You can increase the range of auto-shapes of this software by adding a plugin that gives you handling points to make changes in these shapes.

It also offers some tools and features through which we can convert text into a curve. You can also align text with your desired path in it.

We have Import Filters through which skencil can read different file formats such as adobe illustrator (.ai), Corel CMX, Scalable Vector Graphics (SVG) and many more. All these file formats related to vector graphics.

Through Export Filters, skencil can write the various graphics format such as adobe illustrator, SVG (scalable vector graphics) and PDF (portable document format) files.

It offers single User account that means you need a different account of multiple user or group users.

Limited features with a free account.

You cannot test templates with a free account.

Currently, it is not supported to Microsoft Windows, but in the unstable release, which is 0.7, it may become with compatibility of Microsoft windows.

We can do text transformation in skencil, but for the proper working of it with the transformed text, you need an X-server capable of scaling and transforming fonts.

The current version of skencil only supports True color visuals, which have depths of 15, 16, 24 or 32 bits and Pesudo Color visuals of 8-bits.

Conclusion

We have analyzed Skencil software with all important aspects of it. Now you can easily go through the pros and cons of this software to identify what good features of it helps you in your vector illustration work are.

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The Best Apps And Sites To Learn How To Code

If you have some extra time on your hands and you want to do something productive, you might want to learn a new skill. Consider coding—it’s easy to get started, everything you need is online (oftentimes for free), you can make a career out of it, and the possibilities are endless. Literally.

There are a lot of online resources and apps that can help you go from “total noob” to “master coder.” Here are some of the best we could find out there, but rather than putting all your eggs in one basket, we’d highly recommend using more than one platform at a time.

When it comes to learning to code, there isn’t a ‘one-stop shop’ so don’t be afraid to pick a couple of apps, try them, and take what you need from the parts that work for you

1. Mimo

You may have come across those language learning apps that get you to practice for five or 15 minutes every day, and Mimo takes the same approach to coding. Create a free account, decide how much time you want to devote to your new project daily, and then follow the exercises as instructed.

Mimo is certainly intuitive and straightforward to follow (even for beginners) and it starts with the very basics of coding. You can choose between several coding languages (HTML, CSS, JavaScript, Python, Java, Swift, C++, SQL, and PHP), and the platform immediately shows how the code runs as you write it. This is very practical if there’s something more specific you want to pick up. As well as typing out code, you get exercises where you have to spot mistakes, or drag script elements into the right order, so it keeps the learning experience varied.

Mimo (freemium) is available for Android and iOS.

2. Codecademy

Codecademy combines step-by-step lessons on your browser with optional exercises you can do on mobile, so it allows you to keep up with your coding practice wherever you are. While it’s not the most in-depth or thorough virtual coding school out there, Codecademy is a very useful introduction to the basics, with an intuitive and friendly interface, and explanations of terms and syntax as you go.

A wide variety of app and web programming languages are covered as well: HTML, CSS, JavaScript, Java, Python, Ruby, C++, PHP, Go, Swift, SQL and more. The portal can guide you through specific ‘career paths’ with a clear progression from one lesson to the next, but it’s also possible to just browse around and pick and choose what you want to do—there’s a wealth of material at your disposal.

You can get started with Codecademy and work through 25 courses for free. Sign up for a Pro account—$20 a month, billed annually—and you can access 65 courses, tackle real world projects, and unlock hundreds of extra exercises. You can give the free package a try and then opt for the paid-for version if you decide you actually want to make a career out of coding.

Codecademy (freemium) is available for Android and iOS, and on the web.

3. Programming Hero

Are you a total coding noob? No problem. Programming Hero is beginner friendly. David Nield

If you’re an absolute beginner and want to move at your own pace, then Programming Hero could be just what you’re looking for. It’s very friendly, with jargon-free language and coding challenges that are turned into mini-games, so you never feel like you’re slogging through difficult concepts.

As you work your way up through the different challenges, the platform will help you make your own game. You’ll still be a long way from being able to code your own from scratch, though, but you will at least understand the fundamentals behind coding, and some of the syntax and commands you can use.

Programming Hero (freemium) available for Android and iOS.

4. Grasshopper

Grasshopper is developed by Google, and is one of the more accessible ways for beginners to start coding in this list—you can dive in and be typing and arranging commands in minutes. While it focuses exclusively on JavaScript, the concepts that the platform covers (including loops and functions) apply to any programming language.

Coding exercises are set up like puzzles to solve, with a well-judged balance of instructions, actual coding, and end results on the screen. To begin with, you just have to move elements around on a screen before you actually get to type anything, and the progression speed is nice and steady.

The exercises are short, so you can jump in and do one whenever you have a spare five minutes on whatever device you use—Grasshopper will sync your progress automatically.

The app won’t take you as far as some other code teaching platforms can—you won’t get a job off the back of using Grasshopper—but it’s a really friendly introduction if you’re totally new to this, and it’s completely free to use.

Grasshopper (free) available for Android and iOS, and on the web.

5. Code Avengers

There’s a wide range of paths available on Code Avengers—from exercises suitable for kids to courses that can help you get an actual job in coding.

The coding languages covered are HTML, CSS, JavaScript, and Python, with some extra web development and design tutorials thrown in (covering more general topics). The layout is easy to get to grips with, and includes teaching instructions, code samples, and the end result of your coding all together on the same screen.

Code Avengers is one of the most in-depth and most informative sites we’ve come across, teaching you not just how to do something, but also why you’re doing it. This makes the platform really comprehensive, but it’s not free—pricing starts at $20 a month if you pay for a whole year at once, though you can sign up for a 7-day free trial to make sure Code Avengers suits you. If you don’t want to make a career out of coding or you’re only learning for fun, you’re probably better off going for another platform.

Code Avengers (from $20 a month) is available on the web.

6. Treehouse

Treehouse is for the serious coder. David Nield

Users go through a very clear progression of tutorials and exercises, with a neat sandbox feature called Workspaces, where you can try out experiments of your own. The platform may come across as too formal or too heavy for some (the free trial will help you work this out), but it’s a comprehensive learn-to-code package that covers HTML, CSS, JavaScript, Python, PHP, and more.

Treehouse can teach you how to code for iOS and Android, but ironically, courses are only available through your web browser on a computer.

Treehouse (from $25 a month) on the web.

7. Udemy

While Udemy may seem a bit chaotic and has pricing varies a lot, it’s still one of the best online resources for someone looking to learn to code. It goes from the basics all the way to the most complex programming concepts, and in that sense is on a par with platforms such as Treehouse.

If you’re unfamiliar with the portal, you should know that Udemy works as a sort of online marketplace, in which anyone can create a course. This means teaching styles differ quite a bit—this is great if you find a teacher you connect with, but problematic if you don’t. Content quality can also differ, but most of the material on this platform is top notch.

Udemy courses cover a whole range of topics, but as far as coding goes you’ve got everything from web and mobile development, to artificial intelligence. There’s a really big stack of stuff to go through. Unlike other platforms on this list, teachers on Udemy present tutorials in video form and offer answers to any questions you might have. Having a person on the other end—even if it’s not a one-on-one learning scenario—requires a fair degree of concentration and commitment so you should consider that when signing up for a Udemy class.

Udemy (from $10 and up per course) is available on Android and iOS, and on the web.

8. Dash

The Dash interface certainly impresses, with a coding window on one side and a nice big preview of your finished webpage on the other. It has five well laid out and easy to follow projects, including a responsive blog, a small business website or even a browser game that looks great on desktop or mobile. On each one, you can see instantly how your code affects the live site, making learning much more interactive.

It’s very much an ‘on rails’ experience—you won’t be able to build any website or browser game you like without more learning, but it’s a fine introduction to the basics.

Dash (free) is available on the web.

9. FreeCodeCamp

Free coding app. That’s it. That’s the caption. David Nield

There are some drawbacks, though. FreeCodeCamp isn’t quite as polished in terms of the interface and the course structure as some of the other entries on our list, and you don’t get as much hand-holding. Also, the platform doesn’t offer mobile apps either, so it’s all done through your browser on a computer.

Still, these are all minor details in our opinion, and not at all deal breakers when it comes to choosing a code-teaching platform. FreeCodeCamp is still very comprehensive, available for free, and easy enough at the beginning for anyone to pick up.

FreeCodeCamp (free) is available on the web.

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