javascript - 检查子字符串是否存在于另一个字符串中，正则表达式

Question

我有两个字符串:

var first = "913 DE 6D 3T 222"
var second = "913 DE 3T 222"

我想检查 second 是否出现在 first 中，最好使用 regex。问题是 indexOf 或 includes 返回 second 在 first 中不 ，这是错误的(只有 6D 是不同的):

first.indexOf(second)
-1

first.includes(second)
false

Answer 1

使用String#split和 Array#every方法。

var first = "913 DE 6D 3T 222";
var second = "913 DE 3T 222";

console.log(
  second
  // split the string by space
  .split(' ')
  // check all strings are contains in the first
  .every(function(v) {
    return first.indexOf(v) > -1;

    // if  you want exact word match then use regex with word
    // boundary although you need to escape any symbols which
    // have special meaning in regex but in your case I think all are 
    // alphanumeric char so which is not necessary

    // return (new RegExp('\\b' + v + '\\b')).test(first);
  })
)

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仅供引用:对于较旧的浏览器，请检查 polyfill option of every method .

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