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Groovy \"List Comprehension\" example

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  1. def paramNames  = request.getParameterNames().collect { it }
  2. def paramValues = request.getParameterNames().collect { request.getParameter(it) }
  3.  
  4. // -----------------------------------------------
  5. def getEvenNumbers(l) {
  6.         l.findAll {it % 2 == 0}
  7.     }
  8.  
  9.     def getFilesGreaterThan(size, folder) {
  10.         new File(folder).listFiles().findAll {it.isFile() && it.length() > size}
  11.     }
  12.  
  13.     def solveProblem() {
  14.         (1..9).each { a->
  15.             (0..9).each { b->
  16.                 (0..9).each { c->
  17.                     (0..9).each { d->
  18.                         if ((1000*a + 100*b + 10*c + d)*4 == 1000*d +100*c + 10*b + a) {
  19.                             println "$a, $b, $c, $d"
  20.                         }
  21.                     }
  22.                 }
  23.             }
  24.         }
  25.     }

URL: https://www.ist-dresden.de/blog/?p=11

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