nl_tokens: Assigns value to key of object if the existing value is not equivalent using [ SameValueZero ] ( http : // ecma - international . org / ecma - 262 / 7 . 0 / #sec - samevaluezero ) for equality comparisons .
pl_tokens: function assignValue$1 ( object , key , value ) { var objValue = object [ key ] ; if ( ! ( hasOwnProperty$6 . call ( <mask> , key ) && eq$3 ( objValue , value ) ) || ( value === undefined && ! ( key in object ) ) ) { object [ key ] = value ; } }