July 2013
Intermediate to advanced
370 pages
8h 27m
English
Content preview from Programming Groovy 2
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5.2 GString Lazy-Evaluation Problem
The result we get from GString expressions depends on whether we use values or references in the expression. The result may lead to some surprises if we’re not careful how we compose the expression. Learning this now will help avoid stumbling like your humble author did when learning about string manipulation in Groovy.
Here’s the example that worked well
in the previous section:
| WorkingWithStrings/LazyEval.groovy | |
| | what = new StringBuilder('fence') |
| | text = "The cow jumped over the $what" |
| | println text |
| | |
| | what.replace(0, 5, "moon") |
| | println text |
The output from the code looks pretty reasonable:
| | The cow jumped over the fence |
| | The cow jumped over the moon |
The GString (text) contains the ...
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