The call Method
The call method is used to call a function with a given this value and arguments provided individually. The arguments are passed as a comma-separated list after the this value.
The apply Method
The apply method is similar to call, but it accepts arguments as an array or an array-like object. The array is unpacked, and its elements are passed as individual arguments to the function.
Differences and Use Cases
- call: Accepts arguments individually after the this value.
- apply: Accepts arguments as an array or array-like object.
- call: Arguments are passed individually.
- apply: Arguments are unpacked from an array-like object.
Number of Arguments
- call: The number of arguments must match the number of parameters in the function.
- apply: The number of arguments can vary as long as the array-like object contains the required number of elements.
Choosing Between Them
- Use call when you know the exact number of arguments and can provide them individually.
- Use apply when you have arguments stored in an array or array-like object and want to pass them as separate arguments.
Both call and apply are used to set the this value and invoke a function with specific arguments. The choice between them depends on whether you have arguments in individual variables or an array-like object.