[Solved] What is the purpose of the Ruby method instance_variable_set? — Ans: It sets the value of an instance variable by name. | Ruby

Ruby - Metaprogramming Fundamentals

What is the purpose of the Ruby method instance_variable_set?

AIt returns the value of a class variable.

BIt lists all instance variables of an object.

CIt deletes an instance variable.

DIt sets the value of an instance variable by name.

Step-by-Step Solution

Solution:

Step 1: Understand instance_variable_set
This method allows setting the value of an instance variable by passing its name as a symbol or string and the new value.
Step 2: Differentiate from other methods
It does not return or delete variables, nor list them. Those are done by other methods like instance_variable_get or instance_variables.
Final Answer:
It sets the value of an instance variable by name. -> Option D
Quick Check:
instance_variable_set = sets value [OK]

Quick Trick: Use instance_variable_set to assign instance variables dynamically [OK]

Common Mistakes:

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What is the purpose of the Ruby method instance_variable_set?