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Collection - I

1. Matching IP Address
Word Wrap
Enter input string
184.151.243.192 - Valid 135.19.780.192 - Invalid 104.102.169.42 - Valid 271.47.185.84 - Invalid 62.26.180.265 - Invalid 104.102.169.42 - Valid
Let's start with a simple regex that matches a set of four 3-digit number seperated by a dot. The regex is: (\d{1,3})\.(\d{1,3}).(\d{1,3}).(\d{1,3})
The problem with this regex is that it matches numbers that are outside the range of Ip address (255). 135.19.780.192 is one such incorrect entry.
Enter regex pattern
i - Ignore Case
g - Global Match
m - Multiline
s - Dot All
u - Unicode
y - Sticky
With lastIndex^?
/(\d{1,3})\.(\d{1,3}).(\d{1,3}).(\d{1,3})/gCount:6
184.151.243.192 - Valid 135.19.780.192 - Invalid 104.102.169.42 - Valid 271.47.185.84 - Invalid 62.26.180.265 - Invalid 104.102.169.42 - Valid
match position $1 $2 $3 $4
184.151.243.192 0 184 151 243 192
135.19.780.192 24 135 19 780 192
104.102.169.42 49 104 102 169 42
271.47.185.84 72 271 47 185 84
62.26.180.265 96 62 26 180 265
104.102.169.42 120 104 102 169 42
Let's first find the pattern for first number of the 4-set in each of the row
Add ^ and options g and m to focus only on the first number.
Enter regex pattern
i - Ignore Case
g - Global Match
m - Multiline
s - Dot All
u - Unicode
y - Sticky
With lastIndex^?
/^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\./gmCount:5
184.151.243.192 - Valid 135.19.780.192 - Invalid 104.102.169.42 - Valid 271.47.185.84 - Invalid 62.26.180.265 - Invalid 104.102.169.42 - Valid
match position $1
184. 0 184
135. 24 135
104. 49 104
62. 96 62
104. 120 104
Now that it matches the first part correctly. Let's repeat the same thrice followed by number without dot to complete this.
We can remove the ^ and m as we don't need it anymore.
We should add the word boundary marker as it would set the exact area to apply the pattern.
Enter regex pattern
i - Ignore Case
g - Global Match
m - Multiline
s - Dot All
u - Unicode
y - Sticky
With lastIndex^?
/\b((25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b/gCount:3
184.151.243.192 - Valid 135.19.780.192 - Invalid 104.102.169.42 - Valid 271.47.185.84 - Invalid 62.26.180.265 - Invalid 104.102.169.42 - Valid
match position $1 $2 $3
184.151.243.192 0 243. 243 192
104.102.169.42 49 169. 169 42
104.102.169.42 120 169. 169 42
If we don't want the group capturing, we can disable it as follows:
Enter regex pattern
i - Ignore Case
g - Global Match
m - Multiline
s - Dot All
u - Unicode
y - Sticky
With lastIndex^?
/\b(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b/gCount:3
184.151.243.192 - Valid 135.19.780.192 - Invalid 104.102.169.42 - Valid 271.47.185.84 - Invalid 62.26.180.265 - Invalid 104.102.169.42 - Valid
match position
184.151.243.192 0
104.102.169.42 49
104.102.169.42 120
2. Match Time string in various formats
Word Wrap
Enter input string
12:45 AM 15:30 20:45 9:15 AM 11:30 PM 08:18 AM
To activate the ^ and $ combination in every line, select the Multiline option(m).
12Hr format
Enter regex pattern
i - Ignore Case
g - Global Match
m - Multiline
s - Dot All
u - Unicode
y - Sticky
With lastIndex^?
/^(0?[0-9]|1[0-2]):[0-5][0-9]\s*[AP]M$/gmCount:4
12:45 AM 15:30 20:45 9:15 AM 11:30 PM 08:18 AM
match position $1
12:45 AM 0 12
9:15 AM 21 9
11:30 PM 29 11
08:18 AM 38 08
24Hr format
Enter regex pattern
i - Ignore Case
g - Global Match
m - Multiline
s - Dot All
u - Unicode
y - Sticky
With lastIndex^?
/^([01][0-9]|2[0-3]):[0-5][0-9]$/gmCount:2
12:45 AM 15:30 20:45 9:15 AM 11:30 PM 08:18 AM
match position $1
15:30 9 15
20:45 15 20

match	position	$1	$2	$3	$4
184.151.243.192	0	184	151	243	192
135.19.780.192	24	135	19	780	192
104.102.169.42	49	104	102	169	42
271.47.185.84	72	271	47	185	84
62.26.180.265	96	62	26	180	265
104.102.169.42	120	104	102	169	42

match	position	$1	$2	$3
184.151.243.192	0	243.	243	192
104.102.169.42	49	169.	169	42
104.102.169.42	120	169.	169	42

match	position	$1
12:45 AM	0	12
9:15 AM	21	9
11:30 PM	29	11
08:18 AM	38	08

match	position	$1
15:30	9	15
20:45	15	20