How do you reset an array in Ruby?

The clear() function in Ruby is used to remove all the elements of the given array and returns the array with no elements.

1. Syntax: Array.clear. Here Array is the input array whose elements are to be cleared.
2. Parameters: This function does not accept any parameter.
3. Returns: the array with no elements.

How does GSUB work in Ruby?

gsub! is a String class method in Ruby which is used to return a copy of the given string with all occurrences of pattern substituted for the second argument. If no substitutions were performed, then it will return nil. If no block and no replacement is given, an enumerator is returned instead.

How do you update an array in Ruby?

To update an element in the array, assign a new value to the element’s index by using the assignment operator, just like you would with a regular variable. To make sure you update the right element, you could use the index method to locate the element first, just like you did to find the element you wanted to delete.

How do I replace in Ruby?

Changing a Section of a String Ruby allows part of a string to be modified through the use of the []= method. To use this method, simply pass through the string of characters to be replaced to the method and assign the new string.

How do you clear in Ruby?

You can use system(“clear”) or system(“cls”) according to the terminal you are going to print.

1. If you are using the Windows Command Prompt, use system(“cls”) .
2. If you are using a Mac or Linux system, just use system(“clear”) .

How do you clear an object in Ruby?

You can’t explicitly destroy object. Ruby has automatic memory management. Objects no longer referenced from anywhere are automatically collected by the garbage collector built in the interpreter.

What is gsub ()?

gsub() function in R Language is used to replace all the matches of a pattern from a string. If the pattern is not found the string will be returned as it is.

What is the difference between sub and gsub in R?

The difference is that sub only replaces the first occurrence of the pattern specified, whereas gsub does it for all occurrences (that is, it replaces globally).

How do you add an array to an array in Ruby?

This can be done in a few ways in Ruby. The first is the plus operator. This will append one array to the end of another, creating a third array with the elements of both. Alternatively, use the concat method (the + operator and concat method are functionally equivalent).

How do I replace a string in Ruby?

The simplest way to replace a string in Ruby is to use the substring replacement. We can specify the string to replace inside a pair of square brackets and set the replace value: For example: msg = “Programming in Ruby is fun!”

What is sub in Ruby?

The sub() method replaces just the first instance of a string with another. Gsub meanwhile replaces all instances. Thus:Gsub is closest to a “replace string” method. Sub() is conceptually a “replace first string” method. Ruby program that compares sub, gsubvalue = “abc abc”