const regex = /operator\D+(\d+)/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('operator\\D+(\\d+)', 'gm')
const str = `I have following string dfed operator 11 - 145. I am trying to match string operator 11 and inside this matched string, i am trying to match string 11. Currently I successfully matched operator 11 with regex ((O|o)perator(i|I)?\\s*)\\d+(?=\\s*(-|_)\\s*\\d+). As I am in javascript, I can not use lookbehinds.
Is my approach correct? Is there any way to accomplish this in regex? How can i match string 11 inside previously matched string operator 11?`;
// 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