week2 praksi lahendused

Author: sim642

sols/week2/intro/RegexExercise.java

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+package week2.intro;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.List;
+
+public class RegexExercise {
+
+    // sõnad "kalad" või "jalad".
+    public static final String RE1 = "[kj]alad";
+
+    // Viietähelised sõned, mis lõppevad tähtedega "alad".
+    public static final String RE2 = ".alad"; // sõnad täpsemalt: \b\walad\b
+
+    // color ja colour
+    public static final String RE3 = "colou?r";
+
+    // jaha, jahaaaaaaaaa!
+    public static final String RE4 = "ja+ha+";
+
+    // binaarsõned
+    public static final String RE5 = "^[01]*$";
+
+    // eelviimane täht on "a"
+    public static final String RE6 = "^[ab]*a[ab]$";
+
+    // tagasiviited
+    public static final String RE7 = "^(..)\\1$";
+
+    // nimede asendamine: regulaaravaldis
+    public static final String RE8 = "^(\\w*) (\\w*)$";
+    // millega asendada? (Util.replace'i teine argument)
+    public static final String RP8 = "$2, $1";
+
+    // Eemaldada sulud!
+    public static final String RE9 = " \\(.*?\\)";
+    // Siin asendatakse regexiga sobituvad juppid tühja sõnega.
+
+
+
+    // Testimise meetod, et saaks natuke debuugida, muidu on ka automaattestid.
+
+    static void main() throws IOException {
+        List<String> strings = Files.readAllLines(Paths.get("inputs", "regex.txt"));
+        printLines(RegexUtils.grep(RE1, strings));
+    }
+
+    private static void printLines(List<String> strings) {
+        for (String s : strings) System.out.println(s);
+    }
+
+}

sols/week2/regexapi/Exercise1.java

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+package week2.regexapi;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class Exercise1 {
+
+    // Kui kasutada rühmad siit: http://www.unicode.org/reports/tr18/#General_Category_Property
+    // Siis peaks töötama põhimõtteliselt igal pool, et võib testida regex101.com-is ja tõsta siia.
+    private static final String MAAKOND = "\\p{Lu}\\p{Ll}*\\s*maakond";
+    private static final String ALEV = "\\p{Lu}\\p{Ll}*\\s*\\p{Ll}*";
+    private static final String TANAV = "\\p{Lu}\\p{Ll}*\\s*\\p{Ll}*";
+    private static final String MAJANR = "\\d+";
+    private static final String TAPSUSTUS = "\\p{Ll}*\\s*\\d+";
+
+    private static final String REGEX =
+            MAAKOND + ", " + ALEV + ", " + TANAV + " " + MAJANR + "(, " + TAPSUSTUS + ")?";
+
+    public static List<String> extractAddresses(String text) {
+        Pattern pattern = Pattern.compile(REGEX);
+        Matcher matcher = pattern.matcher(text);
+        List<String> addresses = new ArrayList<>();
+        while (matcher.find()) {
+            addresses.add(matcher.group());
+        }
+        return addresses;
+    }
+}

sols/week2/regexapi/Exercise2.java

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+package week2.regexapi;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class Exercise2 {
+
+    // Kasutame siin ASCII klassid, aga all lisame Unicode flag.
+    private static final String VARIABLE = "[\\p{Alpha}_][\\p{Alnum}_]*";
+
+    // Anname siis rühmitusele nimi "fnname":
+    // http://stackoverflow.com/questions/415580/regex-named-groups-in-java
+    private static final String REGEX =
+            "def\\s+(?<fnname>"+ VARIABLE +")\\s*\\(\\s*"+ VARIABLE +"\\s*,\\s*"+ VARIABLE +"\\s*\\)\\s*:";
+
+    public static List<String> extractFunctions(String text){
+        List<String> functionNames = new ArrayList<>();
+        Pattern pattern = Pattern.compile(REGEX, Pattern.UNICODE_CHARACTER_CLASS); // <-- saab eesti tähtedega kergemini
+        Matcher matcher = pattern.matcher(text);
+        while (matcher.find()){
+            functionNames.add(matcher.group("fnname"));
+        }
+        return functionNames;
+    }
+}