PowerShell: String Methods

List String Methods

# list string methods
"a" | Get-Member -MemberType Method

Get Substring

Substring

• string Substring(int startIndex)
• string Substring(int startIndex, int length)

# substring, from 2 to end
"abcd".substring(2).equals("cd")

# from index 1 to 2
"abcd".substring(1, 2).equals("bc")

String Replace

Replace

• string Replace(string oldValue, string newValue, bool ignoreCase, cultureinfo culture)
• string Replace(string oldValue, string newValue, System.StringComparison comparisonType)
• string Replace(char oldChar, char newChar)
• string Replace(string oldValue, string newValue)

# Case-Sensitive replace
"dog".replace("dog", "cat").equals("cat")

# case insensitive replace
"DOG".replace("dog", "cat", $true, $null).equals("cat")

Split String to Array

Split

• string[] Split(char separator, System.StringSplitOptions options)
• string[] Split(char separator, int count, System.StringSplitOptions options)
• string[] Split(Params char[] separator)
• string[] Split(char[] separator, int count)
• string[] Split(char[] separator, System.StringSplitOptions options)
• string[] Split(char[] separator, int count, System.StringSplitOptions options)
• string[] Split(string separator, System.StringSplitOptions options)
• string[] Split(string separator, int count, System.StringSplitOptions options)
• string[] Split(string[] separator, System.StringSplitOptions options)
• string[] Split(string[] separator, int count, System.StringSplitOptions options)

$x = "a b c".split(" ")

Check Substring

Contains

• bool Contains(string value)
• bool Contains(string value, System.StringComparison comparisonType)
• bool Contains(char value)
• bool Contains(char value, System.StringComparison comparisonType)

"abc".contains("bc") -eq $true

StartsWith

• bool StartsWith(string value)
• bool StartsWith(string value, System.StringComparison comparisonType)
• bool StartsWith(string value, bool ignoreCase, cultureinfo culture)
• bool StartsWith(char value)

EndsWith

• bool EndsWith(string value)
• bool EndsWith(string value, System.StringComparison comparisonType)
• bool EndsWith(string value, bool ignoreCase, cultureinfo culture)
• bool EndsWith(char value)

Get Substring Index

IndexOf

• int IndexOf(char value)
• int IndexOf(char value, int startIndex)
• int IndexOf(char value, System.StringComparison comparisonType)
• int IndexOf(char value, int startIndex, int count)
• int IndexOf(string value)
• int IndexOf(string value, int startIndex)
• int IndexOf(string value, int startIndex, int count)
• int IndexOf(string value, System.StringComparison comparisonType)
• int IndexOf(string value, int startIndex, System.StringComparison comparisonType)
• int IndexOf(string value, int startIndex, int count, System.StringComparison comparisonType)

IndexOfAny

• int IndexOfAny(char[] anyOf)
• int IndexOfAny(char[] anyOf, int startIndex)
• int IndexOfAny(char[] anyOf, int startIndex, int count)

LastIndexOf

• int LastIndexOf(char value)
• int LastIndexOf(char value, int startIndex)
• int LastIndexOf(char value, int startIndex, int count)
• int LastIndexOf(string value)
• int LastIndexOf(string value, int startIndex)
• int LastIndexOf(string value, int startIndex, int count)
• int LastIndexOf(string value, System.StringComparison comparisonType)
• int LastIndexOf(string value, int startIndex, System.StringComparison comparisonType)
• int LastIndexOf(string value, int startIndex, int count, System.StringComparison comparisonType)

LastIndexOfAny

• int LastIndexOfAny(char[] anyOf)
• int LastIndexOfAny(char[] anyOf, int startIndex)
• int LastIndexOfAny(char[] anyOf, int startIndex, int count)

String Insert/Remove

Insert

• string Insert(int startIndex, string value)

"abc".Insert(1, "X")
# aXbc

Remove

• string Remove(int startIndex, int count)
• string Remove(int startIndex)

# remove from index 2 to end
"abcdef".remove(2).equals("ab")

# remove from index 2, 3 chars
"abcdef".remove(2,3).equals("abf")

Trim

• string Trim()
• string Trim(char trimChar)
• string Trim(Params char[] trimChars)

TrimEnd

• string TrimEnd()
• string TrimEnd(char trimChar)
• string TrimEnd(Params char[] trimChars)

TrimStart

• string TrimStart()
• string TrimStart(char trimChar)
• string TrimStart(Params char[] trimChars)

String Comparison

Equals

• bool Equals(System.Object obj)
• bool Equals(string value)
• bool Equals(string value, System.StringComparison comparisonType)
• bool IEquatable[string].Equals(string other)

"abc".equals("abc")
# True

# is Case-Sensitive
"abc".equals("ABC")
# False

CompareTo

• int CompareTo(System.Object value)
• int CompareTo(string strB)
• int IComparable.CompareTo(System.Object obj)
• int IComparable[string].CompareTo(string other)

String Format

PadLeft

• string PadLeft(int totalWidth)
• string PadLeft(int totalWidth, char paddingChar)

PadRight

• string PadRight(int totalWidth)
• string PadRight(int totalWidth, char paddingChar)

ToUpper

• string ToUpper()
• string ToUpper(cultureinfo culture)

"hi".ToUpper()

ToUpperInvariant

• string ToUpperInvariant()

ToLower

• string ToLower()
• string ToLower(cultureinfo culture)

ToLowerInvariant

• string ToLowerInvariant()