length

($$string length)

Integer

Number of characters in $$string

char

($$string char N)

String

Nth character in $$string, counting from the left; the leftmost character is number 1

first

($$string first N)

String

First N characters of $$string

last

($$string last N)

String

Last N characters of $$string

before

($$string before $$str)

String

Substring that precedes the first (leftmost) occurrence of $$str in $$string

after

($$string after $$str)

String

Substring that follows the first (leftmost) occurrence of $$str in $$string

starts

($$string starts $$str)

Boolean

True if $$str is at the start of $$string

ends

($$string ends $$str)

Boolean

True if $$str is at the end of $$string

contains

($$string contains $$str)

Boolean

True if $$str occurs anywhere in $$string

trim first

($$string trim first N)

String

All but the first N characters of $$string

trim last

($$string trim last N)

String

All but the last N characters of $$string

replace with

($$string replace " " with "_")

String

Each instance of first operand is replaced with second operand

upper

($$string upper)

String

$$string is all uppercase

lower

($$string lower)

String

$$string is all lowercase