Posted By

adrianparr on 05/10/10

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uk

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Last Edited at 05/10/10 08:02am

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AS3 Format a UK Postcode (eg. AA99 9AA)

/ Published in: ActionScript 3

This code removes all the spaces and then inserts a single space so that the there are only 3 characters on the right-hand side (the inward code).

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var inputPostcode:String = "   e   c   1   r    5    d   w   ";
trace("inputPostcode: "+inputPostcode);
var checkedPostcode:String = validateUkPostcode(inputPostcode).toUpperCase();
 
if (checkedPostcode == "") {
	trace("No valid postcode was found");
} else {
	trace("checkedPostcode: "+checkedPostcode);
}
 
function validateUkPostcode(str:String):String {
	var returnString:String;
	var withNoSpaces:String = str.split(" ").join("");
	var outwardCode:String = withNoSpaces.substring(0, withNoSpaces.length-3);
	var inwardCode:String = withNoSpaces.substring(withNoSpaces.length-3, withNoSpaces.length);
	var formatted:String = outwardCode + " " + inwardCode;
	str = formatted.replace(/^\s+|\s+$/g, "");
	var pattern:RegExp = /[A-Z]{1,2}[0-9R][0-9A-Z]? [0-9][ABD-HJLNP-UW-Z]{2}/i;
	var result:Object = pattern.exec(str);
	if(result == null) {
		returnString = "";
	} else {
		returnString = result[0];
	}
	return returnString;
}
 
// OUTPUT
// inputPostcode:    e   c   1   r    5    d   w   
// checkedPostcode: EC1R 5DW