StringUtils class abstract

Util class for operations on strings.

Constructors

StringUtils()

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

abbreviate(String str, int maxWidth, {int offset = 0}) → String

Abbreviates a string with maxWidth using dots. If offset is set the Examples:

compare(String? str1, String? str2) → int

Null safe comparison of two strings according their lexical order. null it is treated as less than non-null.

contains(String? str, Pattern searchPattern, [int startIndex = 0]) → bool

Null safe check if a string contains searchPattern.

containsAny(String? str, List<Pattern> searchPatterns, [int startIndex = 0]) → bool

Null safe check if a string contains any of searchPatterns.

defaultIfBlank(String? str, String defaultStr) → String

Returns the string itself or a default if the string is null or blank.

defaultIfEmpty(String? str, String defaultStr) → String

Returns the string itself or a default if the string is null or empty.

defaultString(String? str, String defaultStr) → String

Returns the string itself or a default if the string is null.

hammingDistance(String str1, String str2) → int

Calculates the hamming distance between two strings. The hamming distance is the number of positions where two strings have different chars.

isBlank(String? str) → bool

Null safe check if string is blank.

isEmpty(String? str) → bool

Null safe check if string is empty.

levenshteinDistance(String str1, String str2) → int

Calculates the levenshtein distance between two strings. The levenshtein distance is the number of deletions, insertions or substitutions needed to transform one string into the other.

random({int? length, bool includeNumeric = true}) → String

Creates a random alpha numeric string with a random length between 1 and 64. For a specific length length can be set. If includeNumeric is set to false a string with only alpha characters is generated.

startsWith(String? str, Pattern prefix, [int index = 0]) → bool

Null safe check if a string starts with prefix.

startsWithAny(String? str, List<Pattern> prefixes, [int index = 0]) → bool

Null safe check if a string starts with any of prefixes.

trim(String? str) → String?

Null safe trim operation on a string.