Scala

Scala String Split

In a programming language, we wish to split a string based on some structured data regular expression. The given string fields can have any special characters or be separated by commas. In Scala, we have the split method for this purpose. It can be applied to any string object and return a split array containing all the elements present in it. For a better understanding of the example scripts, we will cover the Scala split method and its use in real life in this post.

What is Split Method in Scala?

The split method can manipulate strings and split them into several specified points. We can call the split method in Scala in any given string. The split method allows us to define the string by which we want to split a string. This specified string is also known as a separator. It can be any character, substring, and regular expression. Also, we can alternatively limit the value of the array using the limit parameter.

Syntax and Parameter of the Split Method in Scala in Ubuntu 20.04

The general syntax of the Split Method we used in Scala is given below:

String_Name.split( regular_expression, int limit)

There are two parameters that the split method takes as an argument.

  • Regular_expression: The regular expression of a string is split using a substring. This can be a regular expression of String, any character, commas, and also a separator.
  • Limit(optional): An integer value is used to limit the number of elements we want in the resultant split array. It is an optional parameter.

The Return Value of the Split Method in Scala in Ubuntu 20.04

The Scala Split method returns a split string array that contains all the elements present in it. It searches for a specified number of occurrences of the split separator. The remainder of the string is stored in the array’s last position when the number is reached. When the limit is reached the split method will stop splitting.

How to Use Split Method in Scala in Ubuntu 20.04

To understand the use of the Split method in Scala, we should take a look at the examples:

Example # 1: Using Split Method in Scala Program

The split method breaks a string into two halves, one of which is given. For this, we have used the split method and passed the specific string as a parameter that we want to split. Let’s execute an example code to see how the split method works.

In the example code, we are trying to split a string. First, we created a class called “myString”. In the main function of the class, we have a variable defined as “str1”. In “str1” we have initialized a string to which we want to split. Then, we have another variable “result”, on this we are calling the split method. We are mentioning “example” as a split expression in the split method. As a result, whenever the string “example” occurs in the variable “str1,” the string will be split and divided into several parts, and then the string will be ignored. The print function will return the split string of elements.

Upon execution of the above code, we have the output splitter string below in the image.

Example # 2: Using Split Method with Limit Parameter in Scala Program

We are using the split method and passing a limit parameter as an argument. So, the array’s value will be limited here, as well as the resultant array. We have an example code with a limit parameter below.

In the example code, we have declared a class as “myString”. In the class, we have a string stored in a variable “str2”. The “str2” is called in another variable “myResult” which we are calling the split method. The split method takes the string regular expression “is” and limits set as “5” as an argument. It will split the string, and we’ve also set the limit option to limit the size of the output array. The “for” is used to assign “r1” a returned value from “myResult”. Through print statements, we can have a resultant array.

The output displays the split array up to the limit specified in the above code.

Example # 3: Using Split Method with Multiple Delimiters

We can also split the string having delimiters or many delimiters. These can be split with the delimiter specified in the split method. Here, we have an example code to demonstrate how it will work.

In the above example code, we have a string with many delimiters. This might look complex but we can split them by passing multiple delimiters as an argument. We have “mystr3” which has four parts. These are separated by different delimiters. We called the split method in “finalResult” to separate strings on delimiters and pass an Array argument. We call the print statement on these elements of string in “for loop”.

The various delimiters are handled correctly by the split method and we have a split array below on the terminal screen of Ubuntu 20.04.

Example # 4: Using Split Method with Separator

If we want to split a string with a character, it is known as a separator. This can be accomplished using a split approach. Separators are the substring of a given string. It can also be a special character or any delimiter as mentioned above. We have an example code of passing a specific separator in the split method.

The example above is declared in class “myString”, which has the main function defined in it. In the main function, we have created a variable “str4”. The “str4” is initialized with a string. This string can be split by calling the string “str4” along with the split method in a new variable “Result”. We have passed a separator “e” which is a substring of “str4” in the split method and also specifies the limit value to “8”. The limit value passed will limit the output resulting array of string. Then, using a for loop and calling the print function to return the split string from “Result”.

The resulting string shows the working of a separator called in a split method, displayed on the screenshot below.

Conclusion

The article was aimed to demonstrate to you the Scala split method. By using this method, how can we split a string into several parts and return the result of the split array? We can also use limit parameters which can limit array elements. Otherwise, it contains the element of the split array. We have discussed all the examples of the split method and its code implementation. You may find ease while using the Scala split string method.

About the author

Saeed Raza

Hello geeks! I am here to guide you about your tech-related issues. My expertise revolves around Linux, Databases & Programming. Additionally, I am practicing law in Pakistan. Cheers to all of you.