actionscript 3 - Hide a character in textField using TextFormat in as3 -


i have textfield text , need hide last character

i tried 

    _textfield.text = "my string";     var newtextformat:textformat =  new textformat();     newtextformat.size = 0;     _textfield.settextformat(newtextformat, _textfield.length-1, _textfield.length-1);

the issue last charter still visible single pixel. there way set font color transparent example

newtextformat.color = <any tranparent color>;

instead of changing size or alpha, recomend replacing text string inside of textfield blank field(" "), this:

_textfield.text = "my string"; var newstring:string=_textfield.text.replace (_textfield.text.charat (_textfield.text.length-1) , " ");  _textfield.text =newstring; //now textfield text strin

if want other character, not last one, can change e.g. 

_textfield.text = "my string"; var newstring:string=_textfield.text.replace (_textfield.text.charat (3) , " ");  _textfield.text =newstring; //now textfield text  tring

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