const regex = /^([^-\n]*-).*?(?i)(\.pdf)$/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^([^-\\n]*-).*?(?i)(\\.pdf)$', 'gm')
const str = `Tab 3-3-z-o.pdf
Should be Tab 3-3.pdf
Tab 2-3-jk2.pdf
Should be: Tab 2-3.pdf
Tab 3-3-Yuwk-3-k-l-s.pdf
Should be: Tab 3-3.pdf`;
// 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