const regex = new RegExp('match this (?:match that)', 'gim')
const str = `match this match that/// TRC20.sol -- API for the TRC20 token standard
// See <https://github.com/tronprotocol/tips/blob/master/tip-20.md>.
// This file likely does not meet the threshold of originality
// required for copyright to apply. As a result, this is free and
// unencumbered software belonging to the public domain.
pragma solidity >=0.4.25;
contract TRC20Events {
event Approval(address indexed src, address indexed guy, uint wad);
event Transfer(address indexed src, address indexed dst, uint wad);
}
contract TRC20 is TRC20Events {
function totalSupply() public view returns (uint);
function balanceOf(address guy) public view returns (uint);
function allowance(address src, address guy) public view returns (uint);
function approve(address guy, uint wad) public returns (bool);
function transfer(address dst, uint wad) public returns (bool);
function transferFrom(
address src, address dst, uint wad
) public returns (bool);
}`;
// 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