Difference between multiple arguments and options object
Multiple Arguments: The arguments object is an array-like object that represents the passed arguments when invoking a function. This array-like object does not have the array prototype chain, hence it cannot use any of the array methods. It has length property but it does not have array’s built-in methods like forEach() and map() method.
- You can use arguments.length to determine how many arguments were passed-in during the given function invocation.
- Code readability is maximum.
- arguments.callee: Reference to the currently executing function that the arguments belong to.
- arguments.length: The number of arguments that were passed to the function.
- arguments.caller: Reference to the function that invoked the currently executing function.
- arguments[@@iterator]: Returns a new Array Iterator object that contains the value for each index in arguments.
Options Object: Options object are a common pattern for passing named arguments into the function. When a function has two or more parameters then we can use the options object. For a function with four or more parameters then the options object is a good choice. A function has one or two-parameter and we want to add more parameters in the future so instead of rewriting the code later we can use options object.
The options object is different from multiple arguments because multiple arguments can take multi-type of arguments e.g. int, float, char, string…etc while options object can take named arguments like AlertIcon, etc only.
- This function can take up to 34 parameters, all of which are optional.
- Using the ‘options as an object’ approach is going to be best. You don’t have to worry about the order of the properties.
- If you have more than four-parameter.
- At least one parameter is optional.
- Feel complex to figure out what parameter function takes.
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Differences between multiple Arguments and Options Object:
|Multiple Arguments||Options Objects|
|Multiple arguments are mostly for obligatory parameters.||Options object are mostly for named arguments.|
|Can not add more arguments after implementation without rewriting.||Can add more arguments after implementation without rewriting.|
|It have index properties like array e.g. arguments have index like [0, 1, 2, 3…].||It does not have index properties like array.|
|It is Passed by Value.||It is Passed by Reference.|
|Can be use for any number of arguments but good for less number of arguments except optional arguments.||Can be use for more than four arguments with atleast one argument is optional.|