alat verifikasi online ekspresi reguler
1, mengimplementasikan ekspresi reguler kustom online untuk mengekstrak konten teks
2, validasiEkspresi reguler apa pun
Apa sebenarnya ekspresi reguler ?
Saat menulis program atau halaman web yang memproses string, seringkali ada kebutuhan untuk menemukan string yang memenuhi aturan kompleks tertentu.Ekspresi reguler adalah alat yang digunakan untuk menggambarkan aturan ini.Dengan kata lain, ekspresi reguler adalah kode yang mencatat aturan teks.
Common metacharacters
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Code
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Description
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.
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Matches any character except newline
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\w
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Match letters or numbers or underscores
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\s
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Matches any whitespace
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\d
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Matching numbers
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\b
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Match the beginning or end of a word
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^
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Match the beginning of a string
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$
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Match end of string
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Common qualifiers
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Code / syntax
|
Description
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*
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Repeat zero or more times
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+
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Repeat one or more times
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?
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Repeat zero or one time
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{n}
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Repeat n times
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{n,}
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Repeat n or more times
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{n,m}
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Repeat n to m times
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Common antonyms
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Code / syntax
|
Description
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\W
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Matches any characters that are not letters, numbers, underscores, or Chinese characters
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\S
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Matches any character that is not a space character
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\D
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Matches any non-digit character
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\B
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Matches where the word is not beginning or ending
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[^x]
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Matches any character except x
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[^aeiou]
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Matches any character except the letters aeiou
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