javascript - JS : Extracting specific text from a string

Question

我有一个像这样的字符串...

var str = "6 validation errors detected: Value '' at 'confirmationCode' failed to satisfy constraint: Member must satisfy regular expression pattern: [\S]+; Value '' at 'confirmationCode' failed to satisfy constraint: Member must have length greater than or equal to 1; Value at 'password' failed to satisfy constraint: Member must satisfy regular expression pattern: [\S]+; Value at 'password' failed to satisfy constraint: Member must have length greater than or equal to 6; Value at 'username' failed to satisfy constraint: Member must satisfy regular expression pattern: [\p{L}\p{M}\p{S}\p{N}\p{P}]+; Value at 'username' failed to satisfy constraint: Member must have length greater than or equal to 1";

我想提取所有以单词...“Value”...开头的“独特”行...

所以预期的输出是......

• “confirmationCode”处的值“”未能满足约束
• “password”的值未能满足约束
• “用户名”的值未能 满足约束

这是我到目前为止所尝试过的......

var x = str.split("\;|\:")  // This is NOT working
console.log(x);

var z = y.filter(word => word.indexOf("Value") > -1) // Also this needs to be tweaked to filter unique values
console.log(z);

性能是一个问题，所以我更喜欢最优化的解决方案。

Answer 1

您可以使用单个正则表达式，不需要 split 或 filter 或循环或其他测试:

var str = "6 validation errors detected: Value '' at 'confirmationCode' failed to satisfy constraint: Member must satisfy regular expression pattern: [\S]+; Value '' at 'confirmationCode' failed to satisfy constraint: Member must have length greater than or equal to 1; Value at 'password' failed to satisfy constraint: Member must satisfy regular expression pattern: [\S]+; Value at 'password' failed to satisfy constraint: Member must have length greater than or equal to 6; Value at 'username' failed to satisfy constraint: Member must satisfy regular expression pattern: [\p{L}\p{M}\p{S}\p{N}\p{P}]+; Value at 'username' failed to satisfy constraint: Member must have length greater than or equal to 1";

console.log(
  str.match(/((^|Value)[^:]+)(?!.*\1)/g)
);