Assignment Replace Arrow For Free

Unlike regular functions, arrow functions do not have their own this . Arguments objects are not available in arrow functions, but are available in regular functions. Regular functions created using function declarations or expressions are 'constructible' and 'callable'.

The operator <- can be used anywhere, whereas the operator = is only allowed at the top level (e.g., in the complete expression typed at the command prompt) or as one of the subexpressions in a braced list of expressions.

It really boils down to preference. Many people are more used to using = for assignment, and it's one less keystroke if you want to save on typing. On the other hand, many R traditionalists prefer <- for clarity, and if you plan to share or publish your code, other might find code using = for assignment hard to read.

An arrow function doesn't have its own this value and the arguments object. Therefore, you should not use it as an event handler, a method of an object literal, a prototype method, or when you have a function that uses the arguments object.

In RStudio the keyboard shortcut for the assignment operator <- is Alt + - (Windows) or Option + - (Mac). In RStudio use Ctrl + L to clear all the code from your console. If you're typing in a script in the source editor pane but you want to move the curser to the console use Ctrl + 2 .

Since arrow functions don't have their own arguments , you cannot simply replace them with an arrow function. However, ES2015 introduces an alternative to using arguments : the rest parameter. // old function sum() { let args = . slice.

As an assignment operator. It's partly because it was inspired by a language called APL, which also had this sign for assignment. , so assigning a variable needed to be done with another symbol. was the standard (and only way) to assign value into a variable.