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improve：更新代码排版

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sjsdfg 2019-12-15 20:04:50 +08:00
parent 814f2bcca0
commit 580c686cbf
1 changed files with 26 additions and 26 deletions
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52
docs/notes/45. 明智审慎地使用Stream.md
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@ -25,8 +25,8 @@ public class Anagrams {
try (Scanner s = new Scanner(dictionary)) {
while (s.hasNext()) {
String word = s.next();
groups.computeIfAbsent(alphabetize(word),
(unused) -> new TreeSet<>()).add(word);
groups.computeIfAbsent(alphabetize(word),
(unused) -> new TreeSet<>()).add(word);
}
}
@ -50,19 +50,19 @@ public class Anagrams {
```java
// Overuse of streams - don't do this!
public class Anagrams {
public static void main(String[] args) throws IOException {
Path dictionary = Paths.get(args[0]);
int minGroupSize = Integer.parseInt(args[1]);
try (Stream<String> words = Files.lines(dictionary)) {
words.collect(
groupingBy(word -> word.chars().sorted()
.collect(StringBuilder::new,
(sb, c) -> sb.append((char) c),
StringBuilder::append).toString()))
.values().stream()
.filter(group -> group.size() >= minGroupSize)
.map(group -> group.size() + ": " + group)
.forEach(System.out::println);
public static void main(String[] args) throws IOException {
Path dictionary = Paths.get(args[0]);
int minGroupSize = Integer.parseInt(args[1]);
try (Stream<String> words = Files.lines(dictionary)) {
words.collect(
groupingBy(word -> word.chars().sorted()
.collect(StringBuilder::new,
(sb, c) -> sb.append((char) c),
StringBuilder::append).toString()))
.values().stream()
.filter(group -> group.size() >= minGroupSize)
.map(group -> group.size() + ": " + group)
.forEach(System.out::println);
}
}
}
@ -76,18 +76,18 @@ public class Anagrams {
// Tasteful use of streams enhances clarity and conciseness
public class Anagrams {
public static void main(String[] args) throws IOException {
Path dictionary = Paths.get(args[0]);
int minGroupSize = Integer.parseInt(args[1]);
public static void main(String[] args) throws IOException {
Path dictionary = Paths.get(args[0]);
int minGroupSize = Integer.parseInt(args[1]);
try (Stream<String> words = Files.lines(dictionary)) {
words.collect(groupingBy(word -> alphabetize(word)))
.values().stream()
.filter(group -> group.size() >= minGroupSize)
.forEach(g -> System.out.println(g.size() + ": " + g));
}
}
// alphabetize method is the same as in original version
try (Stream<String> words = Files.lines(dictionary)) {
words.collect(groupingBy(word -> alphabetize(word)))
.values().stream()
.filter(group -> group.size() >= minGroupSize)
.forEach(g -> System.out.println(g.size() + ": " + g));
}
}
// alphabetize method is the same as in original version
}
```