### **4.2 WordCount**

WordCount is a simple program that counts how often a word occurs in a text file. The code builds a dataset of (String, Int) pairs called counts, and saves the dataset to a file.

The following example submits WordCount code to the Scala shell. Select an input file for the Spark WordCount example. We can use any text file as input.

- Login as user **‘spark’**.

        // Test different attribute formats
        PrunedTag[] tags = PrunedTag.parse("input[type=text]");
        assertEquals(1, tags.length);
        assertTrue(tags[0].toString().contains("attrName=type"));
        assertTrue(tags[0].toString().contains("attrValue=text"));

        tags = PrunedTag.parse("div[data-test=value123]");
        assertEquals(1, tags.length);

    LinearCongruentialGenerator generator = new LinearCongruentialGenerator(input);
    int candidate = 0;
    int next;

    // Jump from bucket to bucket until we go out of range
    while (true) {
      next = (int) ((candidate + 1) / generator.nextDouble());
      if (next >= 0 && next < buckets) {
        candidate = next;
      } else {
        return candidate;
      }
    }
  }

  /**

/**
 * Service class for managing character mapping operations.
 * <p>
 * This service handles character mapping management including CRUD operations
 * and list retrieval. Character mappings are used for text normalization
 * and character substitution during document processing and search operations.
 * </p>
 */
public class CharMappingService {

    /**
     * Creates a new instance of CharMappingService.
     */

import assertk.assertions.isFalse
import assertk.assertions.isNotEqualTo
import assertk.assertions.isNotNull
import assertk.assertions.isNull
import assertk.assertions.isTrue
import java.text.ParseException
import java.text.SimpleDateFormat
import java.util.Arrays
import java.util.Date
import kotlin.test.assertFailsWith
import okhttp3.Cookie.Companion.parse
import okhttp3.Cookie.Companion.parseAll

要運行你的 FastAPI 應用程式來進行開發，你可以使用 `fastapi dev` 命令：

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> dev <u style="text-decoration-style:single">main.py</u>
<font color="#3465A4">INFO    </font> Using path <font color="#3465A4">main.py</font>

  // the text processing methods below.

  public void testWhitespaceBreakingWhitespaceSubset() throws Exception {
    for (int c = 0; c <= Character.MAX_VALUE; c++) {
      if (breakingWhitespace().matches((char) c)) {
        assertTrue(Integer.toHexString(c), whitespace().matches((char) c));
      }
    }
  }

  // The next tests require ICU4J and have, at least for now, been sliced out

// to accumulate the text of a file.
func readLines(b *Reader) string {
	s := ""
	for {
		s1, err := b.ReadString('\n')
		if err == io.EOF {
			break
		}
		if err != nil && err != iotest.ErrTimeout {
			panic("GetLines: " + err.Error())
		}
		s += s1
	}
	return s
}

// Call Read to accumulate the text of a file
func reads(buf *Reader, m int) string {

    SQLModel will know that something declared as `str` will be a SQL column of type `TEXT` (or `VARCHAR`, depending on the database).

### Create an Engine { #create-an-engine }

A SQLModel `engine` (underneath it's actually a SQLAlchemy `engine`) is what **holds the connections** to the database.

			internalLogIf(ctx, err)
		}
		return ""
	}
	defer helmInfoFile.Close()
	scanner := bufio.NewScanner(helmInfoFile)
	for scanner.Scan() {
		if strings.Contains(scanner.Text(), "chart=") {
			helmChartVersion := strings.TrimPrefix(scanner.Text(), "chart=")
			// remove quotes from the chart version
			return strings.Trim(helmChartVersion, `"`)
		}
	}

	return ""
}