Rosetta Code/Tasks without examples: Difference between revisions
Rosetta Code/Tasks without examples (view source)
Revision as of 23:18, 29 October 2020
, 3 years ago→{{header|Kotlin}}
Line 137:
A* search algorithm
</pre>
=={{header|Java}}==
{{trans|Kotlin}}
<lang Java>import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.time.Duration;
import java.util.ArrayList;
import java.util.regex.Pattern;
public class TasksWithoutExamples {
private static String readPage(HttpClient client, URI uri) throws IOException, InterruptedException {
var request = HttpRequest.newBuilder()
.GET()
.uri(uri)
.timeout(Duration.ofSeconds(5))
.setHeader("accept", "text/html")
.build();
var response = client.send(request, HttpResponse.BodyHandlers.ofString());
return response.body();
}
private static void process(HttpClient client, String base, String task) {
try {
var re = Pattern.compile(".*using any language you may know.</div>(.*?)<div id=\"toc\".*", Pattern.DOTALL + Pattern.MULTILINE);
var re2 = Pattern.compile("</?[^>]*>");
var page = base + task;
String body = readPage(client, new URI(page));
var matcher = re.matcher(body);
if (matcher.matches()) {
var group = matcher.group(1);
var m2 = re2.matcher(group);
var text = m2.replaceAll("");
System.out.println(text);
}
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) throws URISyntaxException, IOException, InterruptedException {
var re = Pattern.compile("<li><a href=\"/wiki/(.*?)\"", Pattern.DOTALL + Pattern.MULTILINE);
var client = HttpClient.newBuilder()
.version(HttpClient.Version.HTTP_1_1)
.followRedirects(HttpClient.Redirect.NORMAL)
.connectTimeout(Duration.ofSeconds(5))
.build();
var uri = new URI("http", "rosettacode.org", "/wiki/Category:Programming_Tasks", "");
var body = readPage(client, uri);
var matcher = re.matcher(body);
var tasks = new ArrayList<String>();
while (matcher.find()) {
tasks.add(matcher.group(1));
}
var base = "http://rosettacode.org/wiki/";
var limit = 3L;
tasks.stream().limit(limit).forEach(task -> process(client, base, task));
}
}</lang>
=={{header|Kotlin}}==
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