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Commit 5ac43f7

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‎snippets/regex/miscellaneous/ipv4.md

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---
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Title: IPv4
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Description: Matches IPv4 address
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Author: majvax
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Tags: ipv4,networking
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---
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```regex
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^((25[0-5]|2[0-4]\d|1\d{2}|\d{1,2})\.){3}(25[0-5]|2[0-4]\d|1\d{2}|\d{1,2})$
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-> Usage:
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123.300.0.101 ✗
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127.0.0.1 ✓
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192.168.0.1 ✓
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```
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---
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Title: Unintentional Duplication
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Description: Matches duplicated word in a text.
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Author: majvax
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Tags: trim
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---
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```regex
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\b(\w+)\s+1円\b
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-> Usage:
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I need to finish this task ✗
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I need to to finish this task ✓
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```
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---
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Title: Whitespace Trimmer
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Description: Matches leading and/or trailing whitespace.
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Author: majvax
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Tags: trim
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---
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```regex
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^\s+|\s+$
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-> Usage:
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(don't account for the quotation marks, it just to visualize whitespace)
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"Hello World" ✗
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" Hello World" ✓
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"Hello World " ✓
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" Hello World " ✓
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```

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