Regular
Expressions
101
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Explanation
/
^
-
?
(?:
(?:
0
|
[
1
-
9
]
[
0
-
9
]
*
)(?:
,
[
0
-
9
]
+
)?
|
[
1
-
9
]
[
0
-
9
]
{1,2}
(?:
,
[
0
-
9
]
{3}
)+
)
$
/
gm
^
asserts position at start of a line
-
matches the character
-
with index
45
10
(
2D
16
or
55
8
) literally (case sensitive)
Non-capturing group
(?:
(?:
0
|
[
1
-
9
]
[
0
-
9
]
*
)(?:
,
[
0
-
9
]
+
)?
|
[
1
-
9
]
[
0
-
9
]
{1,2}
(?:
,
[
0
-
9
]
{3}
)+
)
1st Alternative
(?:
0
|
[
1
-
9
]
[
0
-
9
]
*
)(?:
,
[
0
-
9
]
+
)?
Non-capturing group
(?:
0
|
[
1
-
9
]
[
0
-
9
]
*
)
1st Alternative
0
0
matches the character
0
with index
48
10
(
30
16
or
60
8
) literally (case sensitive)
2nd Alternative
[
1
-
9
]
[
0
-
9
]
*
Match a single character present in the list below
[
1
-
9
]
1-9
matches a single character in the range between
1
(index 49)
and
9
(index 57)
(case sensitive)
Match a single character present in the list below
[
0
-
9
]
*
matches the previous token between
zero
and
unlimited
times, as many times as possible, giving back as needed
(greedy)
0-9
matches a single character in the range between
0
(index 48)
and
9
(index 57)
(case sensitive)
Non-capturing group
(?:
,
[
0
-
9
]
+
)?
?
matches the previous token between
zero
and
one
times, as many times as possible, giving back as needed
(greedy)
,
matches the character
,
with index
44
10
(
2C
16
or
54
8
) literally (case sensitive)
Match a single character present in the list below
[
0
-
9
]
+
matches the previous token between
one
and
unlimited
times, as many times as possible, giving back as needed
(greedy)
0-9
matches a single character in the range between
0
(index 48)
and
9
(index 57)
(case sensitive)
2nd Alternative
[
1
-
9
]
[
0
-
9
]
{1,2}
(?:
,
[
0
-
9
]
{3}
)+
Match a single character present in the list below
[
1
-
9
]
1-9
matches a single character in the range between
1
(index 49)
and
9
(index 57)
(case sensitive)
Match a single character present in the list below
[
0
-
9
]
{1,2}
matches the previous token between
1
and
2
times, as many times as possible, giving back as needed
(greedy)
0-9
matches a single character in the range between
0
(index 48)
and
9
(index 57)
(case sensitive)
Non-capturing group
(?:
,
[
0
-
9
]
{3}
)+
+
matches the previous token between
one
and
unlimited
times, as many times as possible, giving back as needed
(greedy)
,
matches the character
,
with index
44
10
(
2C
16
or
54
8
) literally (case sensitive)
Match a single character present in the list below
[
0
-
9
]
{3}
matches the previous token exactly
3
times
0-9
matches a single character in the range between
0
(index 48)
and
9
(index 57)
(case sensitive)
$
asserts position at the end of a line
Global pattern flags
g modifier:
g
lobal. All matches (don't return after first match)
m modifier:
m
ulti line. Causes
^
and
$
to match the begin/end of each line (not only begin/end of string)
Match Information
Your regular expression does not match the subject string.
Try launching the debugger to find out why.
Quick Reference
Regular Expression
v1
No Match
/
/
gm
Test String
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Regular
Expressions
101
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