Simplify Regular Expression with variable amount of alphanumeric character separated by a dash
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0
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I would like to validate a specific string to be correct. A correct string looks like the following:
ab1-peter-application
The rules for the string are <1-4 alphanumeric characters>-<1-30 alphanumeric characters>-<1-30 alphanumeric characters>
I just build the regex as following which I guess would work:
[a-zA-Z0-9]{1,4}[-]{1}[a-zA-Z0-9]{1,30}[-]{1}[a-zA-Z0-9]{1,30}
As every segment seems to be the same and the occurrence of the alphanumeric characters vary I feel like it can be shortened. Is there any chance to shorten/simplify this regex?
regex
asked Nov 12 at 8:03
monti
136214
add a comment |
up vote
0
down vote
favorite
I would like to validate a specific string to be correct. A correct string looks like the following:
ab1-peter-application
The rules for the string are <1-4 alphanumeric characters>-<1-30 alphanumeric characters>-<1-30 alphanumeric characters>
I just build the regex as following which I guess would work:
[a-zA-Z0-9]{1,4}[-]{1}[a-zA-Z0-9]{1,30}[-]{1}[a-zA-Z0-9]{1,30}
As every segment seems to be the same and the occurrence of the alphanumeric characters vary I feel like it can be shortened. Is there any chance to shorten/simplify this regex?
regex
asked Nov 12 at 8:03
monti
136214
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I would like to validate a specific string to be correct. A correct string looks like the following:
ab1-peter-application
The rules for the string are <1-4 alphanumeric characters>-<1-30 alphanumeric characters>-<1-30 alphanumeric characters>
I just build the regex as following which I guess would work:
[a-zA-Z0-9]{1,4}[-]{1}[a-zA-Z0-9]{1,30}[-]{1}[a-zA-Z0-9]{1,30}
As every segment seems to be the same and the occurrence of the alphanumeric characters vary I feel like it can be shortened. Is there any chance to shorten/simplify this regex?
regex
asked Nov 12 at 8:03
monti
136214
I would like to validate a specific string to be correct. A correct string looks like the following:
ab1-peter-application
The rules for the string are <1-4 alphanumeric characters>-<1-30 alphanumeric characters>-<1-30 alphanumeric characters>
I just build the regex as following which I guess would work:
[a-zA-Z0-9]{1,4}[-]{1}[a-zA-Z0-9]{1,30}[-]{1}[a-zA-Z0-9]{1,30}
As every segment seems to be the same and the occurrence of the alphanumeric characters vary I feel like it can be shortened. Is there any chance to shorten/simplify this regex?
regex
regex
asked Nov 12 at 8:03
monti
136214
asked Nov 12 at 8:03
monti
136214
asked Nov 12 at 8:03
monti
136214
asked Nov 12 at 8:03
monti
136214
asked Nov 12 at 8:03
monti
136214
136214
add a comment |
add a comment |
2 Answers
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You can combine the final two parts:
-<1-30 alphanumeric characters>-<1-30 alphanumeric characters>
into a single group, repeated twice. Additionally, a single character in a character set is superfluous - you can remove the character set entirely, in that case, to make the regex more concise. The same is true for {1} (meaningless quantifier):
[a-zA-Z0-9]{1,4}(?:-[a-zA-Z0-9]{1,30}){2}
Additionally, if possible in your environment, use the case-insensitive flag (so you don't have to repeat a-zA-Z) and also use d to represent digits instead of 0-9:
[a-zd]{1,4}(?:-[a-zd]{1,30}){2}
answered Nov 12 at 8:06
CertainPerformance
72.5k143453
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up vote
-1
down vote
[a-zA-Z0-9]{4}(-[a-zA-Z0-9]{30}){2}$ - simple Regex to match exact length required string.
^[a-zA-Z0-9]{1,4}(-[a-zA-Z0-9]{1,30}){2}$ - simple Regex to match variable length required
Hope this will help
answered Nov 12 at 9:33
Ashish Sapkale
454212
lol.. Thats what I had mentioned in my post that it is to match exact string. To match variable string user can easily add the minimum limit to RegEx
– Ashish Sapkale
Nov 12 at 13:50
Answer edited...
– Ashish Sapkale
Nov 12 at 13:54
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
2
down vote
accepted
You can combine the final two parts:
-<1-30 alphanumeric characters>-<1-30 alphanumeric characters>
into a single group, repeated twice. Additionally, a single character in a character set is superfluous - you can remove the character set entirely, in that case, to make the regex more concise. The same is true for {1} (meaningless quantifier):
[a-zA-Z0-9]{1,4}(?:-[a-zA-Z0-9]{1,30}){2}
Additionally, if possible in your environment, use the case-insensitive flag (so you don't have to repeat a-zA-Z) and also use d to represent digits instead of 0-9:
[a-zd]{1,4}(?:-[a-zd]{1,30}){2}
answered Nov 12 at 8:06
CertainPerformance
72.5k143453
add a comment |
up vote
2
down vote
accepted
You can combine the final two parts:
-<1-30 alphanumeric characters>-<1-30 alphanumeric characters>
into a single group, repeated twice. Additionally, a single character in a character set is superfluous - you can remove the character set entirely, in that case, to make the regex more concise. The same is true for {1} (meaningless quantifier):
[a-zA-Z0-9]{1,4}(?:-[a-zA-Z0-9]{1,30}){2}
Additionally, if possible in your environment, use the case-insensitive flag (so you don't have to repeat a-zA-Z) and also use d to represent digits instead of 0-9:
[a-zd]{1,4}(?:-[a-zd]{1,30}){2}
answered Nov 12 at 8:06
CertainPerformance
72.5k143453
add a comment |
up vote
2
down vote
accepted
up vote
2
down vote
accepted
You can combine the final two parts:
-<1-30 alphanumeric characters>-<1-30 alphanumeric characters>
into a single group, repeated twice. Additionally, a single character in a character set is superfluous - you can remove the character set entirely, in that case, to make the regex more concise. The same is true for {1} (meaningless quantifier):
[a-zA-Z0-9]{1,4}(?:-[a-zA-Z0-9]{1,30}){2}
Additionally, if possible in your environment, use the case-insensitive flag (so you don't have to repeat a-zA-Z) and also use d to represent digits instead of 0-9:
[a-zd]{1,4}(?:-[a-zd]{1,30}){2}
answered Nov 12 at 8:06
CertainPerformance
72.5k143453
You can combine the final two parts:
-<1-30 alphanumeric characters>-<1-30 alphanumeric characters>
into a single group, repeated twice. Additionally, a single character in a character set is superfluous - you can remove the character set entirely, in that case, to make the regex more concise. The same is true for {1} (meaningless quantifier):
[a-zA-Z0-9]{1,4}(?:-[a-zA-Z0-9]{1,30}){2}
Additionally, if possible in your environment, use the case-insensitive flag (so you don't have to repeat a-zA-Z) and also use d to represent digits instead of 0-9:
[a-zd]{1,4}(?:-[a-zd]{1,30}){2}
answered Nov 12 at 8:06
CertainPerformance
72.5k143453
answered Nov 12 at 8:06
CertainPerformance
72.5k143453
answered Nov 12 at 8:06
CertainPerformance
72.5k143453
answered Nov 12 at 8:06
CertainPerformance
72.5k143453
72.5k143453
add a comment |
add a comment |
up vote
-1
down vote
[a-zA-Z0-9]{4}(-[a-zA-Z0-9]{30}){2}$ - simple Regex to match exact length required string.
^[a-zA-Z0-9]{1,4}(-[a-zA-Z0-9]{1,30}){2}$ - simple Regex to match variable length required
Hope this will help
answered Nov 12 at 9:33
Ashish Sapkale
454212
lol.. Thats what I had mentioned in my post that it is to match exact string. To match variable string user can easily add the minimum limit to RegEx
– Ashish Sapkale
Nov 12 at 13:50
Answer edited...
– Ashish Sapkale
Nov 12 at 13:54
add a comment |
up vote
-1
down vote
[a-zA-Z0-9]{4}(-[a-zA-Z0-9]{30}){2}$ - simple Regex to match exact length required string.
^[a-zA-Z0-9]{1,4}(-[a-zA-Z0-9]{1,30}){2}$ - simple Regex to match variable length required
Hope this will help
answered Nov 12 at 9:33
Ashish Sapkale
454212
lol.. Thats what I had mentioned in my post that it is to match exact string. To match variable string user can easily add the minimum limit to RegEx
– Ashish Sapkale
Nov 12 at 13:50
Answer edited...
– Ashish Sapkale
Nov 12 at 13:54
add a comment |
up vote
-1
down vote
up vote
-1
down vote
[a-zA-Z0-9]{4}(-[a-zA-Z0-9]{30}){2}$ - simple Regex to match exact length required string.
^[a-zA-Z0-9]{1,4}(-[a-zA-Z0-9]{1,30}){2}$ - simple Regex to match variable length required
Hope this will help
answered Nov 12 at 9:33
Ashish Sapkale
454212
[a-zA-Z0-9]{4}(-[a-zA-Z0-9]{30}){2}$ - simple Regex to match exact length required string.
^[a-zA-Z0-9]{1,4}(-[a-zA-Z0-9]{1,30}){2}$ - simple Regex to match variable length required
Hope this will help
answered Nov 12 at 9:33
Ashish Sapkale
454212
edited Nov 12 at 14:00
answered Nov 12 at 9:33
Ashish Sapkale
454212
answered Nov 12 at 9:33
Ashish Sapkale
454212
answered Nov 12 at 9:33
Ashish Sapkale
454212
454212
lol.. Thats what I had mentioned in my post that it is to match exact string. To match variable string user can easily add the minimum limit to RegEx
– Ashish Sapkale
Nov 12 at 13:50
Answer edited...
– Ashish Sapkale
Nov 12 at 13:54
add a comment |
lol.. Thats what I had mentioned in my post that it is to match exact string. To match variable string user can easily add the minimum limit to RegEx
– Ashish Sapkale
Nov 12 at 13:50
Answer edited...
– Ashish Sapkale
Nov 12 at 13:54
lol.. Thats what I had mentioned in my post that it is to match exact string. To match variable string user can easily add the minimum limit to RegEx
– Ashish Sapkale
Nov 12 at 13:50
lol.. Thats what I had mentioned in my post that it is to match exact string. To match variable string user can easily add the minimum limit to RegEx
– Ashish Sapkale
Nov 12 at 13:50
Answer edited...
– Ashish Sapkale
Nov 12 at 13:54
Answer edited...
– Ashish Sapkale
Nov 12 at 13:54
add a comment |
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