const regex = /\b[A-ZA-z]+(?=\s(?=ssh|folder|http))/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('\\b[A-ZA-z]+(?=\\s(?=ssh|folder|http))', 'gm')
const str = `Thu May 23 22:41:55 2019 19 10.10.10.20 22131676 /mnt/tmp/test.txt b s o r J]ohn ssh 0 *
Thu May 23 22:42:55 2019 19 10.10.10.20 22131676 /mnt/tmp/test.txt b s o i Ja[ke folder 0 *
Thu May 23 22:41:55 2019 19 10.10.10.20 22131676 /mnt/tmp/test.txt b s o t Ste^ve http 0 *`;
// 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