const regex = /[a-zA-Z]\d([a-zA-Z]|\d)(.([a-zA-Z]|\d){1,4})?/g;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('[a-zA-Z]\\d([a-zA-Z]|\\d)(.([a-zA-Z]|\\d){1,4})?', 'g')
const str = `L89.141 – Pressure ulcer of left lower back, stage 1
L89.142 – Pressure ulcer of left lower back, stage 2
L89.143 – Pressure ulcer of left lower back, stage 3
L89.144 – Pressure ulcer of left lower back, stage 4
L89.149 – Pressure ulcer of left lower back, unspecified stage
L89.151 – Pressure ulcer of sacral region, stage 1
L89.152 – Pressure ulcer of sacral region, stage 2
A12.123a
123.1
B23
B12.
B12.321assdf
12B23.234a ds`;
// 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