| //Project Euler # 10 | |
| //http://projecteuler.net/problem=10 | |
| @GrabResolver( name='s', root='https://oss.sonatype.org/repositories/snapshots' ) | |
| @Grab(group='org.gperfutils', module='gbench', version='0.4.2-groovy-2.1') | |
| @Grab( 'com.bloidonia:groovy-stream:0.7.0-SNAPSHOT' ) | |
| import groovy.transform.* | |
| import groovy.stream.Stream | |
| import groovyx.gbench.Benchmark |
From the simple R example of reshape here, given a List of Maps like this:
data = [ [ id: 1, time: 1, x1: 5, x2: 6 ],
[ id: 1, time: 2, x1: 3, x2: 5 ],
[ id: 2, time: 1, x1: 6, x2: 1 ],
[ id: 2, time: 2, x1: 2, x2: 4 ] ]And the methods melt:
| findPerpendicularDistance = ( point, line ) -> | |
| [pointX,pointY] = point[0..1] | |
| lineStart = x: line[0][0], y: line[0][1] | |
| lineEnd = x: line[1][0], y: line[1][1] | |
| slope = ( lineEnd.y - lineStart.y ) / ( lineEnd.x - lineStart.x ) | |
| intercept = lineStart.y - ( slope * lineStart.x ) | |
| Math.abs( slope * pointX - pointY + intercept ) / Math.sqrt( Math.pow( slope, 2) + 1) | |
| douglasPeucker = ( points, epsilon ) -> | |
| maxIndex = maxDistance = 0 |
| #!/usr/bin/env groovy | |
| // Trying it in Groovy as a shell script (just for fun) | |
| import java.util.regex.Pattern | |
| // All folders on the path which have contents: | |
| path = System.env[ 'PATH' ] | |
| .tokenize( File.pathSeparator ) | |
| .collect( { new File( it ) } ) |