const regex = /\d_([a-zA-Z_]+)_[0-9]+_/g;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('\\d_([a-zA-Z_]+)_[0-9]+_', 'g')
const str = ` abc_account2621_activity_20161116_20161117_030627_311999667.csv
abc_account2621_click_2016111606_20161116_221031_311735299.csv
abc_account2621_impression_2016111605_20161116_221808_311685411.csv
abc_account2621_rich_media_2016111606_20161116_192542_311735300.csv
abc_account2621_match_table_actwd342ivity_cats_20161116_20161117_0311_31.csv.gz
abc_account2621_match_table_activity_tdwypes_20161116_20161117_0342_31.csv.gz`;
// 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