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answered Jan 1, 2011 at 1:31Because assignment works on variables not objects and thus cannot be implemented as a method.
Content Under CC-BY-SA license Everything You Need to Know About Ruby Operators - RubyGuides
Learn about different types of operators in Ruby, such as assignment (=, +=, ||=), arithmetic (*, /, %), comparison (>, <=, ==), and more. See examples, syntax, and usage of each operator. See more
First, we are going to look at logical operators. You can use these operators to help you compare two objects& make a decision based on the result. Here’s a table: All these operators are methods, and they return a boolean value, with the exception of the … See more
Next up is assignment operators, and unlike all the operators we have seen until now, these are not methods. You have the basic assignment operator: But you also have the combined … See more
The next set of operators are the arithmetic operators. Nothing new here… But just like the ==operator, these are methods. This is … See more
Until now you have only seen operators that work with 2 values, but there are also operators that work with only one value, we call these “unary operators”. For example: This creates a mutable copy of a frozen string. You can define your own unary operators (+ / … See more
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