July 2007
Beginner to intermediate
176 pages
2h 30m
English
Content preview from Ruby Pocket Reference
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Pseudovariables
Table 4 shows Ruby’s pseudovariables. A pseudovariable is an object that looks like a variable, acts like a constant, and can’t be assigned a value. These are also listed in Table 1.
Table 4. Pseudovariables in Ruby
Pseudovariable | Description |
|---|---|
| Logical or Boolean |
| Empty, uninitialized, or invalid; always |
| Current object (receiver invoked by a method). |
| Logical or Boolean |
| Name of current source file. |
| Number of current line in the current source file. |
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