在不同的字符串中查找包含“hello”的“hello”单词(附加)

在不同的字符串中查找包含“hello”的“hello”单词，可以使用多种编程语言中的字符串处理功能来实现。以下是一些常见编程语言的示例代码：

Python 示例

import re

def find_hello_words(text):
    # 使用正则表达式查找独立的 "hello" 单词
    pattern = r'\bhello\b'
    matches = re.findall(pattern, text, re.IGNORECASE)
    return matches

# 示例字符串
texts = [
    "Say hello to the world!",
    "Hello, how are you?",
    "I said hello there.",
    "hellohello",
    "oh hello!"
]

for text in texts:
    print(f"Text: '{text}' -> Matches: {find_hello_words(text)}")

JavaScript 示例

function findHelloWords(text) {
    // 使用正则表达式查找独立的 "hello" 单词
    const pattern = /\bhello\b/gi;
    const matches = text.match(pattern);
    return matches || [];
}

// 示例字符串
const texts = [
    "Say hello to the world!",
    "Hello, how are you?",
    "I said hello there.",
    "hellohello",
    "oh hello!"
];

texts.forEach(text => {
    console.log(`Text: '${text}' -> Matches:`, findHelloWords(text));
});

Java 示例

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class HelloFinder {
    public static String[] findHelloWords(String text) {
        // 使用正则表达式查找独立的 "hello" 单词
        Pattern pattern = Pattern.compile("\\bhello\\b", Pattern.CASE_INSENSITIVE);
        Matcher matcher = pattern.matcher(text);
        java.util.List<String> matches = new java.util.ArrayList<>();
        while (matcher.find()) {
            matches.add(matcher.group());
        }
        return matches.toArray(new String[0]);
    }

    public static void main(String[] args) {
        String[] texts = {
            "Say hello to the world!",
            "Hello, how are you?",
            "I said hello there.",
            "hellohello",
            "oh hello!"
        };

        for (String text : texts) {
            System.out.println("Text: '" + text + "' -> Matches: " + java.util.Arrays.toString(findHelloWords(text)));
        }
    }
}