javascript - 检查字符串是否包含完全匹配

Question

我想检查字符串(let entry)是否包含与let Expect完全匹配:

let expect = 'i was sent'
let entry = 'i was sente to earth' // should return false
// let entry = 'to earth i was sent' should return true

// includes() using the first instance of the entry returns true
if(entry.includes(expect)){
console.log('exact match')

} else {
console.log('no matches')

}

StackOverflow 上有很多答案，但我找不到有效的解决方案。

注意:

let expect = 'i was sent' 
let entry = 'to earth i was sent'

应该返回true

let expect = 'i was sent' 
let entry = 'i was sente to earth'

应该返回 false

Answer 1

似乎您正在谈论匹配单词边界，这可以使用 RegExp 中的 \b 断言来完成，该断言匹配单词边界，所以你就可以了:

const escapeRegExpMatch = function(s) {
    return s.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
};
const isExactMatch = (str, match) => {
  return new RegExp(`\\b${escapeRegExpMatch(match)}\\b`).test(str)
}

const expect = 'i was sent'

console.log(isExactMatch('i was sente to earth', expect)) // <~ false
console.log(isExactMatch('to earth i was sent', expect)) // <~ true

希望有帮助:)