使用单个正则表达式

Question

标题说明了一切

• 单一正则表达式
• 删除前导空格
• 删除尾随空格

即

"  fooHello World" => "Hello World"
"fooBing space in the middlefoo  " => "Bing space in the middle"
"  foo " => ""
" fooHellofoo  " => "Hello"

Answer 1

您可以使用trim()删除前导/尾随空格。

您可以使用replace()通过正则表达式定位foo并将其删除。尝试运行以下代码段：

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const trimAndRemoveFoo = (str) => {
  return str.trim().replace(/foo/g, '');
}

// log trimAndRemoveFoo function with sample strings
console.log(trimAndRemoveFoo("  fooHello World"));
console.log(trimAndRemoveFoo("fooBing space in the middlefoo  "));
console.log(trimAndRemoveFoo("  foo "));
console.log(trimAndRemoveFoo(" fooHellofoo  "));

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Answer 2

您可以使用replace进行正则表达式搜索，并使用以下正则表达式/\W*foo\W*/g

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const strs = [
  "  fooHello World",
  "fooBing space in the middlefoo  ",
  "  foo ",
  " fooHellofoo  "
];

const results = strs.map((str) => {
  return str.replace(/\W*foo\W*/g, '');
});

console.log(results)

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