| function test(str, re) |
| { |
| return str.replace(re, ","); |
| } |
| noInline(test); |
| |
| // 4-6 digit numbers: the thousands-separator idiom produces exactly one match. |
| const strs = []; |
| for (let k = 0; k < 16; k++) { |
| const digits = 4 + (k % 3); |
| let s = String(1 + (k % 9)); |
| for (let d = 1; d < digits; d++) |
| s += String((k + d * 7) % 10); |
| strs.push(s); |
| } |
| |
| const re = /\B(?=(\d{3})+(?!\d))/g; |
| |
| let result; |
| for (let i = 0; i < 2000000; ++i) |
| result = test(strs[i & 15], re); |
| |
| if (test("1234", re) !== "1,234") |
| throw new Error("bad result: " + test("1234", re)); |
| if (test("123456", re) !== "123,456") |
| throw new Error("bad result: " + test("123456", re)); |
