StringExtension extension
Null-safe validation, parsing, formatting, and conversion helpers for strings.
- on
Properties
- date → DateTime?
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Available on String?, provided by the StringExtension extension
Returns DateTime if string is a date string like "2025-01-01 12:00:00"no setter - dateOnly → DateTime?
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Available on String?, provided by the StringExtension extension
Returns DateTime if string is a date string like "2025-01-01"no setter - ipv4Tov6 → String?
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Available on String?, provided by the StringExtension extension
Convert an IPv4 address to an IPv6 address,no setter - ipv6Tov4 → String?
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Available on String?, provided by the StringExtension extension
Convert an IPv6 address to an IPv4 address,no setter - isBlank → bool
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Available on String?, provided by the StringExtension extension
Returns true if string is null, empty, or only whitespace.no setter - isChineseFullName → bool
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Available on String?, provided by the StringExtension extension
Returnstrueifnameis a valid Chinese full name.no setter - isChineseIdNumber → bool
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Available on String?, provided by the StringExtension extension
Returnstrueif this string is a valid Chinese resident ID number.no setter - isCreditCard → bool
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Available on String?, provided by the StringExtension extension
Returns true if string is a valid credit card numberno setter - isDate → bool
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Available on String?, provided by the StringExtension extension
Returns true if string is a dateno setter - isDEANumberOfUS → bool
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Available on String?, provided by the StringExtension extension
Returns true if string is a valid US Drug Enforcement Agencyno setter - isEmail → bool
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Available on String?, provided by the StringExtension extension
Returns true if string is a valid email addressno setter - isEmpty → bool
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Available on String?, provided by the StringExtension extension
Returns true if string is null or emptyno setter - isIPAddress → bool
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Available on String?, provided by the StringExtension extension
Returns true if string is a valid IPv4 or IPv6 addressno setter - isIPv4 → bool
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Available on String?, provided by the StringExtension extension
Returns true if string is a valid IPv4 addressno setter - isIPv6 → bool
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Available on String?, provided by the StringExtension extension
Returns true if string is a valid IPv6 addressno setter - isJson → bool
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Available on String?, provided by the StringExtension extension
Returns true if string is a valid JSON stringno setter - isNotBlank → bool
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Available on String?, provided by the StringExtension extension
Returns true if string has at least one non-whitespace character.no setter - isNotEmpty → bool
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Available on String?, provided by the StringExtension extension
Returns true if string is not emptyno setter - isNumeric → bool
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Available on String?, provided by the StringExtension extension
Returns true if string is a valid numberno setter - isPhoneNumberOfUS → bool
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Available on String?, provided by the StringExtension extension
Returns true if string is a valid US Phone Numberno setter - isQuery → bool
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Available on String?, provided by the StringExtension extension
Validates URL query string (handles ? & # fragments, allows empty values)no setter - isSSNofUS → bool
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Available on String?, provided by the StringExtension extension
Returns true if string is a valid US Society Security Numberno setter - isStrongPassword → bool
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Available on String?, provided by the StringExtension extension
Returns true if string match strong password requirementsno setter - isTime → bool
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Available on String?, provided by the StringExtension extension
Returns true if string is a timeno setter - isUrl → bool
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Available on String?, provided by the StringExtension extension
Returns true if string is a valid urlno setter - nullIfBlank → String?
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Available on String?, provided by the StringExtension extension
Returns null when this string is null, empty, or only whitespace.no setter - orEmpty → String
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Available on String?, provided by the StringExtension extension
Returns this string, or an empty string when it is null.no setter - time → Time?
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Available on String?, provided by the StringExtension extension
Returns Time if string is a time string like "12:00:00"no setter - timeOnly → Time?
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Available on String?, provided by the StringExtension extension
Returns Time if string is a time string like "12:00:00"no setter - trimmed → String
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Available on String?, provided by the StringExtension extension
Returns a trimmed string, or an empty string when it is null.no setter
Methods
-
bytes(
) → List< int> -
Available on String?, provided by the StringExtension extension
Returns a list of the UTF-16 code units of the string. -
bytesChunks(
int chunkSize) → List< List< int> > -
Available on String?, provided by the StringExtension extension
Splits the string's UTF-16 code units (bytes) into a list of chunks. -
bytesCount(
) → int -
Available on String?, provided by the StringExtension extension
Calculates the byte count of a string, treating non-ASCII characters as 2 bytes. -
capitalize(
{bool allWords = false}) → String -
Available on String?, provided by the StringExtension extension
Returns string with capitalized first letter. -
chunks(
int chunkSize) → List< String> -
Available on String?, provided by the StringExtension extension
Splits the string into a list of chunks of a specified size. -
containsIgnoreCase(
String other) → bool -
Available on String?, provided by the StringExtension extension
Returns true if this string containsother, ignoring letter case. -
equals(
String? other) → bool -
Available on String?, provided by the StringExtension extension
Returns true if string equals without ignoring case -
equalsIgnoreCase(
String? other) → bool -
Available on String?, provided by the StringExtension extension
Returns true if string equals with ignoring case -
isValidFileExtension(
[List< String> ? allowed]) → bool -
Available on String?, provided by the StringExtension extension
Returns true if string is a file -
json(
) → dynamic -
Available on String?, provided by the StringExtension extension
Returns JSON object if string is a valid JSON string -
limit(
int maxLength, {String ellipsis = '...'}) → String -
Available on String?, provided by the StringExtension extension
Limits this string tomaxLengthand appendsellipsiswhen truncated. -
mask(
{int start = 0, int? end, String mask = '*'}) → String -
Available on String?, provided by the StringExtension extension
Masks the characters fromstarttoendwithmask. -
numeric(
) → num? -
Available on String?, provided by the StringExtension extension
Returns double 0.564 from string percentage like "56.4%" Parses this string as a double literal and returns its value. -
onlyDigits(
) → String -
Available on String?, provided by the StringExtension extension
Returns only the numeric digits from this string. -
removeWhitespace(
) → String -
Available on String?, provided by the StringExtension extension
Returns a copy of this string with all whitespace removed. -
reverse(
) → String -
Available on String?, provided by the StringExtension extension
Returns this string reversed by rune. -
toCamelCase(
) → String -
Available on String?, provided by the StringExtension extension
Converts a string from snake_case or kebab-case to camelCase. -
toSnakeCase(
{String separator = '_'}) → String -
Available on String?, provided by the StringExtension extension
Converts a string from camelCase to snake_case.