const regex = /^\w+(?: \w+)* +V\d{1,2}\.\d{1,2} +(?:3[01]|[12][0-9]|0[1-9])\/(?:1[0-2]|0[1-9])\/(?:20)?[0-9]{2}/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^\\w+(?: \\w+)* +V\\d{1,2}\\.\\d{1,2} +(?:3[01]|[12][0-9]|0[1-9])\\\/(?:1[0-2]|0[1-9])\\\/(?:20)?[0-9]{2}', 'gm')
const str = `hardware -v
...(need to ignore junk here in case there is any)
MyHardware V1.23 01/02/20 (This is the only line I need)
PROCESSOR:xxxxxxxxxx
abc <n> <c> [r]
def <n> <c> [r]
MyHardware V1.23 01/02/03
MyHardware V12.34 01/02/03
MyHardware V1.23 01/02/2003
MyHardware V12.34 01/02/2003
My Hardware V1.23 01/02/20`;
// Reset `lastIndex` if this regex is defined globally
// regex.lastIndex = 0;
let m;
while ((m = regex.exec(str)) !== null) {
// This is necessary to avoid infinite loops with zero-width matches
if (m.index === regex.lastIndex) {
regex.lastIndex++;
}
// The result can be accessed through the `m`-variable.
m.forEach((match, groupIndex) => {
console.log(`Found match, group ${groupIndex}: ${match}`);
});
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions