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：

＆＃13;

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  "));

＆＃13;

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

＆＃13;

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)

＆＃13;

使用单个正则表达式

2 个答案: