I want to validate a text field to accept just text like this :
I don't want the types like this :
so I make this regular expression but it seems doesn't work like what I want
var reg = /^\d*(((?!.*--)(?!.*,,)(?!.*;;)(?!.*,;)(?!.*,-)(?!.*-;)(?!.*-,)(?!.*;,)(?!.*;-))[,-;])*\d$/
thanks for your help :)
you can simply use the regex
function match(str){
return str.match(/^(?!.*([-,])\d+\1)(?!.*,\d+-)\d+(?:[-,;]\d+)*$/) != null
}
console.log(match(';1'));
console.log(match(',1'));
console.log(match('1;;2'));
console.log(match('1-3'));
console.log(match('12'));
console.log(match('1,2;2,3;1-3'));
console.log(match('1-2;4;2,3;4;1-3'));
console.log(match('1,2,3'));take a look at regex demo
1,2,3?Here's my attempt. Based on your examples I've assumed that semi-colons are used to separate 'ranges', where a 'range' can be a single number or a pair separated by either a comma or a hyphen.
var re = /^\d+([,\-]\d+)?(;\d+([,\-]\d+)?)*$/;
// Test cases
[
'1',
'1,2',
'1-2',
'1;2',
'1,2;2,3;1-3',
'1-2;4;2,3;4;1-3',
'12',
';1',
',1',
'-1',
'1;;2',
'1,,2',
'1--2',
'1-2-3',
'1,2,3',
'1,2-3'
].forEach(function(str) {
console.log(re.test(str));
});The first part, \d+([,\-]\d+)? matches a 'range' and the second part (;\d+([,\-]\d+)?)* allows further 'ranges' to be added, each starting with a semi-colon.
You can add in ?: to make the groups non-capturing if you like. That's probably a good idea but I wanted to keep my example as simple as I could so I've left them out.
You may use
/^\d+(?:(?:[-,;]\d+){3,})?$/
See the regex demo
Details
^ - start of string\d+ - 1 or more digits(?:(?:[-,;]\d+){3,})? - 1 or 0 sequences of:
(?:[-,;]\d+){3,} - 3 sequences of:
[-,;] - a -, , or ;\d+ - 1 or more digits$ - end of stringvar ss = [ '1,2;2,3;1-3','1-2;4;2,3;4;1-3','12',';1',',1','-1','1;;2','1,,2','1--2','1-2-3','1,2,3','1,2-3',';1',',1','-1','1;;2','1,,2','1--2' ];
var rx = /^\d+(?:(?:[-,;]\d+){3,})?$/;
for (var s of ss) {
console.log(s, "=>", rx.test(s));
}NOTE: the [,-;] creates a range between , and ; and matches much more than just ,, - or ; (see demo).
1,3,41, 1,3, or 1,3,4,5 but not 1,3,4? Please explain the rule. Or do you want to avoid matching delimited numbers if they are separated with only 1 type of separator (i.e. if there is a separator, there must be at least 2 different ones)?