/**
 *  Substring search.
 */

def substringSearch(string, substring) {
    def found = false
    def max = string.length() - substring.length()
    
    test:
    for(int i = 0; i <= max; i++) {
        def n = substring.length()
        def j = i
        def k = 0
        while(n-- != 0) {
    	println "i: $i, j: $j, k: $k"
            if(string[j++] != substring[k++])
                continue test
        }
        found = true
        break
    }
    
    return found
}

println substringSearch('able was I ere I saw elba', 'ere')