SwiftString is a lightweight string extension for Swift. This library was motivated by having to search StackOverflow for common string operations, and wanting them to be in one place with test coverage.
SwiftString is available through CocoaPods. To install it, simply add the following line to your Podfile:
pod "SwiftString"
import SwiftString
between(left, right)
"<a>foo</a>".between("<a>", "</a>") // "foo"
"<a><a>foo</a></a>".between("<a>", "</a>") // "<a>foo</a>"
"<a>foo".between("<a>", "</a>") // nil
"Some strings } are very {weird}, dont you think?".between("{", "}") // "weird"
"<a></a>".between("<a>", "</a>") // nil
"<a>foo</a>".between("<a>", "<a>") // nil
camelize()
"os version".camelize() // "osVersion"
"HelloWorld".camelize() // "helloWorld"
"someword With Characters".camelize() // "somewordWithCharacters"
"data_rate".camelize() // "dataRate"
"background-color".camelize() // "backgroundColor"
capitalize()
"hello world".capitalize() // "Hello World"
chompLeft(string)
"foobar".chompLeft("foo") // "bar"
"foobar".chompLeft("bar") // "foo"
chompRight(string)
"foobar".chompRight("bar") // "foo"
"foobar".chompRight("foo") // "bar"
collapseWhitespace()
" String \t libraries are \n\n\t fun\n! ".collapseWhitespace() // "String libraries are fun !")
contains(substring)
"foobar".contains("foo") // true
"foobar".contains("bar") // true
"foobar".contains("something") // false
count(string)
"hi hi ho hey hihey".count("hi") // 3
decodeHTML()
"The Weekend ‘King Of The Fall’".decodeHTML() // "The Weekend ‘King Of The Fall’"
"<strong> 4 < 5 & 3 > 2 .</strong> Price: 12 €. @ ".decodeHTML() // "<strong> 4 < 5 & 3 > 2 .</strong> Price: 12 €. @ "
"this is so "good"".decodeHTML() // "this is so \"good\""
endsWith(suffix)
"hello world".endsWith("world") // true
"hello world".endsWith("foo") // false
ensureLeft(prefix)
"/subdir".ensureLeft("/") // "/subdir"
"subdir".ensureLeft("/") // "/subdir"
ensureRight(suffix)
"subdir/".ensureRight("/") // "subdir/"
"subdir".ensureRight("/") // "subdir/"
indexOf(substring)
"hello".indexOf("hell"), // 0
"hello".indexOf("lo"), // 3
"hello".indexOf("world") // nil
initials()
"First".initials(), // "F"
"First Last".initials(), // "FL"
"First Middle1 Middle2 Middle3 Last".initials() // "FMMML"
initialsFirstAndLast()
"First Last".initialsFirstAndLast(), // "FL"
"First Middle1 Middle2 Middle3 Last".initialsFirstAndLast() // "FL"
isAlpha()
"fdafaf3".isAlpha() // false
"afaf".isAlpha() // true
"dfdf--dfd".isAlpha() // false
isAlphaNumeric()
"afaf35353afaf".isAlphaNumeric() // true
"FFFF99fff".isAlphaNumeric() // true
"99".isAlphaNumeric() // true
"afff".isAlphaNumeric() // true
"-33".isAlphaNumeric() // false
"aaff..".isAlphaNumeric() // false
isEmpty()
" ".isEmpty() // true
"\t\t\t ".isEmpty() // true
"\n\n".isEmpty() // true
"helo".isEmpty() // false
isNumeric()
"abc".isNumeric() // false
"123a".isNumeric() // false
"1".isNumeric() // true
"22".isNumeric() // true
"33.0".isNumeric() // true
"-63.0".isNumeric() // true
join(sequence)
",".join([1,2,3]) // "1,2,3"
",".join([]) // ""
",".join(["a","b","c"]) // "a,b,c"
"! ".join(["hey","who are you?"]) // "hey! who are you?"
latinize()
"šÜįéïöç".latinize() // "sUieioc"
"crème brûlée".latinize() // "creme brulee"
lines()
"test".lines() // ["test"]
"test\nsentence".lines() // ["test", "sentence"]
"test \nsentence".lines() // ["test ", "sentence"]
pad(n, string)
"hello".pad(2) // " hello "
"hello".pad(1, "\t") // "\thello\t"
padLeft(n, string)
"hello".padLeft(10) // " hello"
"what?".padLeft(2, "!") // "!!what?"
padRight(n, string)
"hello".padRight(10) // "hello "
"hello".padRight(2, "!") // "hello!!"
startsWith(prefix)
"hello world".startsWith("hello") // true
"hello world".startsWith("foo") // false
split(separator)
"hello world".split(" ")[0] // "hello"
"hello world".split(" ")[1] // "world"
"helloworld".split(" ")[0] // "helloworld"
times(n)
"hi".times(3) // "hihihi"
" ".times(10) // " "
toBool()
"asdwads".toBool() // nil
"true".toBool() // true
"false".toBool() // false
toFloat()
"asdwads".toFloat() // nil
"2.00".toFloat() // 2.0
"2".toFloat() // 2.0
toInt()
"asdwads".toInt() // nil
"2.00".toInt() // 2
"2".toInt() // 2
toDate()
"asdwads".toDate() // nil
"2014-06-03".toDate() // NSDate
toDateTime()
"asdwads".toDateTime() // nil
"2014-06-03 13:15:01".toDateTime() // NSDate
toDouble()
"asdwads".toDouble() // nil
"2.00".toDouble() // 2.0
"2".toDouble() // 2.0
trimmedLeft()
" How are you? ".trimmedLeft() // "How are you? "
trimmedRight()
" How are you? ".trimmedRight() // " How are you?"
trimmed()
" How are you? ".trimmed() // "How are you?"
slugify()
"Global Thermonuclear Warfare".slugify() // "global-thermonuclear-warfare"
"Crème brûlée".slugify() // "creme-brulee"
stripPunctuation()
"My, st[ring] *full* of %punct)".stripPunctuation() // "My string full of punct"
substring(startIndex, length)
"hello world".substring(0, length: 1) // "h"
"hello world".substring(0, length: 11) // "hello world"
[subscript]
"hello world"[0...1] // "he"
"hello world"[0..<1] // "h"
"hello world"[0] // "h"
"hello world"[0...10] // "hello world"
Andrew Mayne, andrew@redbricklab.com
SwiftString is available under the MIT license. See the LICENSE file for more info.