i want to display a Quadratic equation with format like (4x2).

Question

i want to display a Quadratic equation with format like (4x2). i want to display 2 as superscript automatically after typing x in the textbox.

Answer 1

Unicode offers superscript digits.

• \u2070 = ⁰
• \u00B9 = ¹
• \u00B2 = ²
• \u00B3 = ³
• \u2074 = ⁴
• \u2075 = ⁵
• \u2076 = ⁶
• \u2077 = ⁷
• \u2078 = ⁸
• \u2079 = ⁹

So simply replace a 2 that's supposed to be superscript with U+00B2.

4x² - 2x + 4

Here's some sample code:

private static const SUPER_DIGIT:Object = {
    '0':0x2070, '1':0x00B9, '2':0x00B2, '3':0x00B3, '4':0x2074, 
    '5':0x2075, '6':0x2076, '7':0x2077, '8':0x2078, '9':0x2079,
    '-':0x207B 
};

// Converts all 0123456789- characters to their superscript forms.
public static function toSuperscript(str:String):String {
    var buffer:Array = new Array(str.length);
    for (var i:int = 0; i < str.length; ++i) {
        buffer[i] = SUPER_DIGIT[str.charAt(i)];
        if (buffer[i] == null) buffer[i] = str.charCodeAt(i); 
    }
    return String.fromCharCode.apply(null, buffer);
}

Edit:
If you passed my method 4x2 it'd return ⁴x². What you need to do is--within an update event on your text field--detect substrings that need to be converted to superscript and replace them. A quick rule that'll work for you is to say "if a digit comes immediately after a character with a code equal to or greater than 'A' (\u0041), replace it with its superscript equivillant."

Answer 2

it would be great if you can explain this further

Answer 3

plz help me..it's urgent