Ruby Conditional Assignment

Ruby Conditional Assignment-17
On the other hand, class variables '@@classvar' and '@instvar' are in scope across the entire class and, in the case of @@class variables, across the children classes.This new child of Test also has @@classvar with the original value newvar.print_classvar.The general format of this expression is as follows: conditional ? If the conditional expression is true, then the operator will evaluate as the true expression.

On the other hand, class variables '@@classvar' and '@instvar' are in scope across the entire class and, in the case of @@class variables, across the children classes.This new child of Test also has @@classvar with the original value newvar.print_classvar.

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Here, the conditional operator is being used to select between two strings.

The entire operator expression is everything including the conditional, question mark, two strings, and the colon.

If no prefix expression is used, the main Object class is used by default.

Conditional ternary should be used when the operations after the if or else statements are simple enough to be put into one line.

You may have noticed that this looks quite un-Ruby.

Complex expressions just don't belong on one line in Ruby - it's usually split up and easier to read.

$variable class Test def initialize(arg1='kiwi') @instvar=arg1 @@[email protected] ' told you so!!

' [email protected] end def print_instvar puts @instvar end def print_localvar puts @@classvar puts localvar end end var=var.print_instvar (Name Error). Well, in the scope of the method print_localvar there doesn't exists localvar, it exists in method initialize(until GC kicks it out).

In Ruby, these sequences are created using the ".." and "..." range operators.

The two-dot form creates an inclusive range, while the three-dot form creates a range that excludes the specified high value. is a special operator that takes the form of a method call to determine whether or not the passed expression is defined.

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