CFLib.org – Common Function Library Project

Description:
Converts a day string to a number (e.g. Sunday to 1, Monday to 2, etc.).

Return Values:
A numeric index corresponding to the day of the week (Sunday=1)

Example:

<cfoutput>#dayOfWeekAsInteger("Wednesday")#</cfoutput>

Parameters:

Full UDF Source:

/**
 * Converts a day string to a number.
 * v0.9 by Simon Bingham
 * v1.0 by Adam Cameron. Rename & raise exception when input is invalid
 * 
 * @param day      A day of the week in English, eg Wednesday (Required)
 * @return A numeric index corresponding to the day of the week (Sunday=1) 
 * @author Simon Bingham (me@simonbingham.me.uk) 
 * @version 1, December 9, 2013 
 */
numeric function dayOfWeekAsInteger(required string day){
    var days = "Sunday,Monday,Tuesday,Wednesday,Thursday,Friday,Saturday";
    var index = listFindNoCase(days, day);
    if (index){
        return index;
    }else{
        throw(type="ArgumentOutOfRangeException", message="Invalid day value", detail="day argument value must be one of #days#");
    }
}