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@fumokmm
Created October 26, 2009 14:13
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リストにハッシュをつけてランダムアクセスするデモ
String getSHA1(String source) {
java.security.MessageDigest md = java.security.MessageDigest.getInstance('SHA-1')
md.update(source.getBytes('UTF-8'))
md.digest().collect{ String.format('%02x', it) }.join()
}
def list = (1..10).collect{
[it, getSHA1(it.toString())]
}
println list
println collect(list, 3)
def collect(list, num) {
def hash = getSHA1(Runtime.runtime.freeMemory().toString())
def result = []
result.addAll list.findAll{ it[1] <= hash }
if (result.size() >= num) {
return result[0..<num]
}
result.addAll list.findAll{ it[1] > hash }
println "2: ${result.size()}個"
if (result.size() >= num) {
return result[0..<num]
}
return result
}
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