文本去空格

复制import re

# 示例文本
raw = "  Hello   world!   \n\n  This  is   a   test.  "

# 1. 去除首尾空格
stripped = raw.strip()
print(f"strip: {repr(stripped)}")

# 2. 合并多个连续空格为单个空格
single_space = re.sub(r' +', ' ', stripped)
print(f"single: {repr(single_space)}")

# 3. 去除所有空格（含换行、制表符）
no_space = re.sub(r'\s+', '', raw)
print(f"no_space: {repr(no_space)}")

# 4. 去除空行（连续换行合并为一个换行）
no_blank = re.sub(r'\n\s*\n', '\n', raw).strip()
print(f"no_blank: {repr(no_blank)}")

复制package main

import (
	"fmt"
	"regexp"
	"strings"
)

func main() {
	raw := "  Hello   world!   \n\n  This  is   a   test.  "

	// 1. 去除首尾空格
	stripped := strings.TrimSpace(raw)
	fmt.Printf("trim: %q\n", stripped)

	// 2. 合并多个连续空格为单个空格
	re := regexp.MustCompile(` +`)
	single := re.ReplaceAllString(stripped, " ")
	fmt.Printf("single: %q\n", single)

	// 3. 去除所有空白字符
	reAll := regexp.MustCompile(`\s+`)
	noSpace := reAll.ReplaceAllString(raw, "")
	fmt.Printf("no_space: %q\n", noSpace)

	// 4. 去除空行
	reBlank := regexp.MustCompile(`\n\s*\n`)
	noBlank := strings.TrimSpace(reBlank.ReplaceAllString(raw, "\n"))
	fmt.Printf("no_blank: %q\n", noBlank)
}

复制// 示例文本
const raw = "  Hello   world!   \n\n  This  is   a   test.  ";

// 1. 去除首尾空格
const stripped = raw.trim();
console.log(`trim: ${JSON.stringify(stripped)}`);

// 2. 合并多个连续空格为单个空格
const single = stripped.replace(/ +/g, ' ');
console.log(`single: ${JSON.stringify(single)}`);

// 3. 去除所有空白字符（含换行、制表符）
const noSpace = raw.replace(/\s+/g, '');
console.log(`no_space: ${JSON.stringify(noSpace)}`);

// 4. 去除空行（连续换行合并为一个换行）
const noBlank = raw.replace(/\n\s*\n/g, '\n').trim();
console.log(`no_blank: ${JSON.stringify(noBlank)}`);