Oshgnacknak
a136c9b98e
git-subtree-dir: H02 git-subtree-split: c53b8335cebf2a8ed06ca14f89263c558a06ef6b
79 lines
3 KiB
Java
79 lines
3 KiB
Java
package h02;
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import org.tudalgo.algoutils.student.annotation.DoNotTouch;
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import org.tudalgo.algoutils.student.annotation.StudentImplementationRequired;
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import java.util.Arrays;
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/**
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* This class serves as a container for the methods that are to be implemented by the students for exercise H2.1.2.
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*/
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public class TwoDimensionalArrayStuff {
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/**
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* Prevent instantiation of this utility class.
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*/
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private TwoDimensionalArrayStuff() {
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throw new IllegalStateException("This class is not meant to be instantiated.");
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}
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/**
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* Returns an array containing the number of occurrences of the query {@link String} in each line of the input array.
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*
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* @param input the input array
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* @param query the query {@link String}
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* @return an array containing the number of occurrences of the query {@link String} in each line of the input array
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*/
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@StudentImplementationRequired("H2.1.2")
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public static int[] occurrences(final String[][] input, final String query) {
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// TODO: H2.1.2
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return org.tudalgo.algoutils.student.Student.crash("H2.1.2 - Remove if implemented");
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}
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/**
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* Returns the mean of the input array.
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*
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* @param input the input array
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* @return the mean of the input array
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*/
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@StudentImplementationRequired("H2.1.2")
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public static float mean(final int[] input) {
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// TODO: H2.1.2
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return org.tudalgo.algoutils.student.Student.crash("H2.1.2 - Remove if implemented");
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}
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/**
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* Returns the mean number of occurrences of the query {@link String} in each line of the input array.
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*
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* @param input the input array
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* @param query the query {@link String}
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* @return the mean number of occurrences of the query {@link String} in each line of the input array
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*/
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@DoNotTouch
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public static float meanOccurrencesPerLine(final String[][] input, final String query) {
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return mean(occurrences(input, query));
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}
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/**
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* Overload that splits the input string by lines and spaces, then calls regular meanOccurrencesPerLine.
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*
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* @param input the input string to split by lines and spaces
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* @param query the query {@link String}
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* @return the mean number of occurrences of the query {@link String} in each line of the input array
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*/
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@DoNotTouch
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public static float meanOccurrencesPerLine(final String input, final String query) {
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// filter out unwanted symbols
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final String filteredInput = input.replaceAll("[^\\w\\s]", "");
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// split by lines
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final var processedInput = Arrays.stream(filteredInput.split("(\\r\\n|\\r|\\n)"))
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// split by spaces
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.map(line -> line.split("\\s"))
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// collect to 2D array
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.toArray(String[][]::new);
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/// uncomment the following line to log processed input
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// System.out.printf("Processed input: %s%n", Arrays.deepToString(processedInput));
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// call regular meanOccurrencesPerLine
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return meanOccurrencesPerLine(processedInput, query);
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}
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}
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