Following scripts can be used for scripted validators within the workflow

issue.projectObject.name == "My First Project Name"

if ( cfValues['FIELD1']?.value == 'Yes') { 
    if ( cfValues['FIELD2'] ) {
        return true
    } 
    else return false
     }
 else return true

Date today123 = new Date()
if ( cfValues['FIELD1'] ) { 
    if ( cfValues['DATEFIELD2'].getTime() > today123.getTime() ) {
        return true
    } 
    else return false
     }
 else return true

def selectedSegment = cfValues['Segment']
def selectedSegmentString = selectedSegment.toString()
if ( selectedSegmentString.equals("Some String") ){
    // do something here
 
}