正則表達式（Javascript）允許忽略逗號

Question

const value = 'I am a student. My age is 5';
const regex = new RegExp('\\b' + value, 'i'); //what to add here?

console.log(regex.test('I am a student, my age is 5')); //true
console.log(regex.test('I am a student my age is 5')); //false

我想忽略,以使我的第二個字符串為真。

Answer 1

你可能想要一個更通用的正則表達式：

const regex =  /^I am a \w+[.,]? My age is \d+$/i

console.log(regex.test('I am a student, my age is 5')); //should be true
console.log(regex.test('I am a student my age is 5')); //should be true
console.log(regex.test('I am a INSERTWORD my age is 5')); //should be true
console.log(regex.test('I am a student my age is 230')); //should be true

一個不太通用的正則表達式可能如下所示：

const regex =  /^I am a student[.,]? My age is 5$/i

console.log(regex.test('I am a student, my age is 5')); //should be true
console.log(regex.test('I am a student my age is 5')); //should be true
console.log(regex.test('I am a INSERTWORD my age is 5')); //should be false
console.log(regex.test('I am a student my age is 230')); //should be false

如果您想了解有關正則表達式的更多信息，請訪問：

https://regex101.com/ regex 101 是我訪問 regex 測試網站的地方。

https://www.regextester.com/

https://regexr.com/