codewars046: 机场起飞降落电子指示牌

最新推荐文章于 2025-09-06 09:26:50 发布

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最新推荐文章于 2025-09-06 09:26:50 发布

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文章标签： python

原文链接：https://my.oschina.net/u/553266/blog/818064

本文介绍了一个针对Python工程师的招聘标准示例，通过一个具体的代码案例展示了如何使用特定的类和方法来实现字符串的转换，包括定义字符集、创建翻转显示效果等。

2019独角兽企业重金招聘Python工程师标准>>>

Instructions:

Airport Arrivals/Departures - #1

Solution:

class Dinglemouse {
  
  private static final String ALPHABET = Preloaded.ALPHABET;
  private static final int SIZE = ALPHABET.length();
  private static Character flap(Character x, int step) {

		int current = ALPHABET.indexOf(x);
		int to = (current + step) % SIZE;

		return ALPHABET.charAt(to);
	}
  public static String[] flapDisplay(final String[] lines, final int[][] rotors) {

		String[] rslt = new String[lines.length];
		for (int i = 0; i < lines.length; i++) {
			StringBuilder sb = new StringBuilder(lines[i]);
			for (int j = 0; j < rotors[i].length; j++) {
				for (int k = j; k < sb.length(); k++) {
					Character c = sb.charAt(k);
					Character to = flap(c, rotors[i][j]);
					sb.replace(k, k + 1, String.valueOf(to));
				}
			}
			rslt[i] = sb.toString();
		}
		return rslt;
	
  }
  
}

public class Preloaded {

public static final String ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZ ?![@#](https://my.oschina.net/u/2839266)&()|<>.:=-+*/0123456789";

public static String[] prettyPrint(String[] a) {
	return a;
}

}

### Example Tests:

import org.junit.Test; import static org.junit.Assert.*;

public class ExampleTests {

private String[] BEFORE(String[] a) { System.out.println("Before:"); return Preloaded.prettyPrint(a); }

private String[] AFTER(String[] a) { System.out.println("After:"); return Preloaded.prettyPrint(a); }

@Test public void example() { // CAT => DOG String[] before = BEFORE(new String[]{"CAT"}); int[][] rotors = new int[][]{{1,13,27}}; String[] after = AFTER(Dinglemouse.flapDisplay(before,rotors)); String[] expected = new String[]{"DOG"}; assertArrayEquals(expected, after); }

@Test public void basic() { // HELLO => WORLD! String[] before = BEFORE(new String[]{"HELLO "}); int[][] rotors = new int[][]{{15,49,50,48,43,13}}; String[] after = AFTER(Dinglemouse.flapDisplay(before,rotors)); String[] expected = new String[]{"WORLD!"}; assertArrayEquals(expected, after);

  // CODE => WARS
  String[] before2 = BEFORE(new String[]{"CODE"});
  int[][] rotors2 = new int[][]{{20,20,28,0}};
  String[] after2 = AFTER(Dinglemouse.flapDisplay(before2,rotors2));
  String[] expected2 = new String[]{"WARS"};
  assertArrayEquals(expected2, after2);

}

转载于:https://my.oschina.net/u/553266/blog/818064