Usage

-- Lingo syntax
stringExpression1 contains stringExpression2

// JavaScript syntax
stringExpression1.indexOf(stringExpression2);

Description

Operator; compares two strings and determines whether stringExpression1 contains stringExpression2 (TRUE) or not (FALSE).

The contains comparison operator has a precedence level of 1.

The contains comparison operator is useful for checking whether the user types a specific character or string of characters. You can also use the contains operator to search one or more fields for specific strings of characters.

Example

This example determines whether a character passed to it is a digit:

-- Lingo syntax
on isNumber aLetter
    digits = "1234567890"
    if digits contains aLetter then
        return TRUE
    else
        return FALSE
    end if
end

// JavaScript syntax
function isNumber(aLetter) {
    var digits = "1234567890"
    if (digits.indexOf(aLetter) >= 0) {
        return true; 
    } else {
        return false;
    }
}

See also

offset() (string function), starts