正则表达式4非连续且没有重复数字

Question

I've been strugling for a few days with this validation. I'm working with Javascript to validate a user pin of 4 digits which shouldn't accept adjacent repeated digits such as 1135 or 1552 etc. It shouldn't accept sequences of digits, for example: 1234 or 3456 or even 1275 (0 sequence digits like 12** *56* , **87 , 21** (ie no ascending or descending sequence).

I've tried modifying the regex from this answer from @polygenelubricants

His regex is the following:

^(?=\d{4}$)(?:(.)\1*|0?1?2?3?4?5?6?7?8?9?|9?8?7?6?5?4?3?2?1?0?)$

But it also matches 3579 which in my case it should be allowed, so I modified it to be something like this (which in my head means, match all 4 digits numbers, then look for all the digits and check if they're not repeated more than once OR if it doesn't find a 0 and a 1 next to it or a 1 and a 2 next to it... (and the same for descending order))

^(?:\d{4}$)(?:(.)(?!\1)|0?1?|1?2?|2?3?|3?4?|4?5?|5?6?|6?7?|7?8?|8?9?|9?8?|8?7?|7?6?|6?5?|5?4?|4?3?|3?2?|2?1?|1?0?)$

However when I tested it I'm getting all 4 digits numbers but it's not evaluating if they're repeated more than once or are sequenced.

See the running example

Answer 1

How about something like this:

(?!.*(?:(\d)\1|12|23|34|45|56|67|78|89|98|87|76|65|54|43|32|21))\d{4}

Tested here: http://www.regexpal.com/?fam=93673

And if 0 needs to be included, do this:

(?!.*(?:(\d)\1|01|12|23|34|45|56|67|78|89|98|87|76|65|54|43|32|21|10))\d{4}

Answer 2

I guess this should do:

/^(?!.*(00|11|22|33|44|55|66|77|88|99|01|12|23|34|45|56|67|78|89|10|21|32|43|54|65|76|87|98))\d{4}$/

https://regex101.com/r/lY7nD4/1

Answer 3

Regex is not the right way of doing this, because regex can't compare numbers.

However, a foolproof regex solution would be generating all the allowed sequences and joining them in a big regex. I think it would be

/^(?:0202|0203|0204|0205|0206|0207|0208|0209|0240|0241|0242|0246|0247|0248|0249|0250|0251|0252|0253|0257|0258|0259|0260|0261|0262|0263|0264|0268|0269|0270|0271|0272|0273|0274|0275|0279|0280|0281|0282|0283|0284|0285|0286|0290|0291|0292|0293|0294|0295|0296|0297|0302|0303|0304|0305|0306|0307|0308|0309|0313|0314|0315|0316|0317|0318|0319|0350|0351|0352|0353|0357|0358|0359|0360|0361|0362|0363|0364|0368|0369|0370|0371|0372|0373|0374|0375|0379|0380|0381|0382|0383|0384|0385|0386|0390|0391|0392|0393|0394|0395|0396|0397|0402|0403|0404|0405|0406|0407|0408|0409|0413|0414|0415|0416|0417|0418|0419|0420|0424|0425|0426|0427|0428|0429|0460|0461|0462|0463|0464|0468|0469|0470|0471|0472|0473|0474|0475|0479|0480|0481|0482|0483|0484|0485|0486|0490|0491|0492|0493|0494|0495|0496|0497|0502|0503|0504|0505|0506|0507|0508|0509|0513|0514|0515|0516|0517|0518|0519|0520|0524|0525|0526|0527|0528|0529|0530|0531|0535|0536|0537|0538|0539|0570|0571|0572|0573|0574|0575|0579|0580|0581|0582|0583|0584|0585|0586|0590|0591|0592|0593|0594|0595|0596|0597|0602|0603|0604|0605|0606|0607|0608|0609|0613|0614|0615|0616|0617|0618|0619|0620|0624|0625|0626|0627|0628|0629|0630|0631|0635|0636|0637|0638|0639|0640|0641|0642|0646|0647|0648|0649|0680|0681|0682|0683|0684|0685|0686|0690|0691|0692|0693|0694|0695|0696|0697|0702|0703|0704|0705|0706|0707|0708|0709|0713|0714|0715|0716|0717|0718|0719|0720|0724|0725|0726|0727|0728|0729|0730|0731|0735|0736|0737|0738|0739|0740|0741|0742|0746|0747|0748|0749|0750|0751|0752|0753|0757|0758|0759|0790|0791|0792|0793|0794|0795|0796|0797|0802|0803|0804|0805|0806|0807|0808|0809|0813|0814|0815|0816|0817|0818|0819|0820|0824|0825|0826|0827|0828|0829|0830|0831|0835|0836|0837|0838|0839|0840|0841|0842|0846|0847|0848|0849|0850|0851|0852|0853|0857|0858|0859|0860|0861|0862|0863|0864|0868|0869|0902|0903|0904|0905|0906|0907|0908|0909|0913|0914|0915|0916|0917|0918|0919|0920|0924|0925|0926|0927|0928|0929|0930|0931|0935|0936|0937|0938|0939|0940|0941|0942|0946|0947|0948|0949|0950|0951|0952|0953|0957|0958|0959|0960|0961|0962|0963|0964|0968|0969|0970|0971|0972|0973|0974|0975|0979|1302|1303|1304|1305|1306|1307|1308|1309|1313|1314|1315|1316|1317|1318|1319|1350|1351|1352|1353|1357|1358|1359|1360|1361|1362|1363|1364|1368|1369|1370|1371|1372|1373|1374|1375|1379|1380|1381|1382|1383|1384|1385|1386|1390|1391|1392|1393|1394|1395|1396|1397|1402|1403|1404|1405|1406|1407|1408|1409|1413|1414|1415|1416|1417|1418|1419|1420|1424|1425|1426|1427|1428|1429|1460|1461|1462|1463|1464|1468|1469|1470|1471|1472|1473|1474|1475|1479|1480|1481|1482|1483|1484|1485|1486|1490|1491|1492|1493|1494|1495|1496|1497|1502|1503|1504|1505|1506|1507|1508|1509|1513|1514|1515|1516|1517|1518|1519|1520|1524|1525|1526|1527|1528|1529|1530|1531|1535|1536|1537|1538|1539|1570|1571|1572|1573|1574|1575|1579|1580|1581|1582|1583|1584|1585|1586|1590|1591|1592|1593|1594|1595|1596|1597|1602|1603|1604|1605|1606|1607|1608|1609|1613|1614|1615|1616|1617|1618|1619|1620|1624|1625|1626|1627|1628|1629|1630|1631|1635|1636|1637|1638|1639|1640|1641|1642|1646|1647|1648|1649|1680|1681|1682|1683|1684|1685|1686|1690|1691|1692|1693|1694|1695|1696|1697|1702|1703|1704|1705|1706|1707|1708|1709|1713|1714|1715|1716|1717|1718|1719|1720|1724|1725|1726|1727|1728|1729|1730|1731|1735|1736|1737|1738|1739|1740|1741|1742|1746|1747|1748|1749|1750|1751|1752|1753|1757|1758|1759|1790|1791|1792|1793|1794|1795|1796|1797|1802|1803|1804|1805|1806|1807|1808|1809|1813|1814|1815|1816|1817|1818|1819|1820|1824|1825|1826|1827|1828|1829|1830|1831|1835|1836|1837|1838|1839|1840|1841|1842|1846|1847|1848|1849|1850|1851|1852|1853|1857|1858|1859|1860|1861|1862|1863|1864|1868|1869|1902|1903|1904|1905|1906|1907|1908|1909|1913|1914|1915|1916|1917|1918|1919|1920|1924|1925|1926|1927|1928|1929|1930|1931|1935|1936|1937|1938|1939|1940|1941|1942|1946|1947|1948|1949|1950|1951|1952|1953|1957|1958|1959|1960|1961|1962|1963|1964|1968|1969|1970|1971|1972|1973|1974|1975|1979|2020|2024|2025|2026|2027|2028|2029|2030|2031|2035|2036|2037|2038|2039|2040|2041|2042|2046|2047|2048|2049|2050|2051|2052|2053|2057|2058|2059|2060|2061|2062|2063|2064|2068|2069|2070|2071|2072|2073|2074|2075|2079|2080|2081|2082|2083|2084|2085|2086|2090|2091|2092|2093|2094|2095|2096|2097|2402|2403|2404|2405|2406|2407|2408|2409|2413|2414|2415|2416|2417|2418|2419|2420|2424|2425|2426|2427|2428|2429|2460|2461|2462|2463|2464|2468|2469|2470|2471|2472|2473|2474|2475|2479|2480|2481|2482|2483|2484|2485|2486|2490|2491|2492|2493|2494|2495|2496|2497|2502|2503|2504|2505|2506|2507|2508|2509|2513|2514|2515|2516|2517|2518|2519|2520|2524|2525|2526|2527|2528|2529|2530|2531|2535|2536|2537|2538|2539|2570|2571|2572|2573|2574|2575|2579|2580|2581|2582|2583|2584|2585|2586|2590|2591|2592|2593|2594|2595|2596|2597|2602|2603|2604|2605|2606|2607|2608|2609|2613|2614|2615|2616|2617|2618|2619|2620|2624|2625|2626|2627|2628|2629|2630|2631|2635|2636|2637|2638|2639|2640|2641|2642|2646|2647|2648|2649|2680|2681|2682|2683|2684|2685|2686|2690|2691|2692|2693|2694|2695|2696|2697|2702|2703|2704|2705|2706|2707|2708|2709|2713|2714|2715|2716|2717|2718|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

I build that with the code from the following snippet:

 var allowedSequences = [], currentSequence = Array(4); (function backtracking(i, prev) { if(i == 4) { allowedSequences.push(currentSequence.slice().join('')); return; } for(var n=0; n<10; ++n) { if(prev == void 0 || Math.abs(n-prev) > 1) { currentSequence[i] = n; backtracking(i+1, n); } } })(0); document.write('/^(?:' + allowedSequences.join('|') + ')$/');