How to remove the string outside the regular

for example: var reg = "/ 1\ d {10} /"
how to remove the outer string so that:
var reg = / 1\ d {10} /

Jul.15,2022

var reg = "/1\d{10}/";
reg = eval(reg);
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1bf159d-31d90.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bf159d-31d90.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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