const regex = new RegExp('\\b\\d{1,2}[- /]+\\d{1,2}[- /]+\\d{2,4}', 'g')
const str = `im trying to retrieve a date from a string. the problem is that the pattern of this date varies a lot (string comes from an OCR reading). These are the patterns i need to identify:
11/11/1111 (i can get this one already)
11-11-1111 (i can get this one already)
11 11 1111 (i can get this one already)
11- 11- 1111
11 11 1111
11-11 1111
23- 10-17
9 06- 17
`;
// 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