With the help of _.iterators.mapcat() method, we can get the function iterator which when called return the value which is flattening the contents of iterator and combined with the unary function by using this method.
Parameters: This method accepts two parameter as mentioned above and described below:
- iter: This parameter holds the iterator list of the array.
- unaryFn: This parameter holds the unary function key.
Return value: Return the function iterator which generate the value by mapping with unaryFn.
Note: To execute the below examples, you have to install the underscore-contrib library by using this command prompt we have to execute the following command.
npm install underscore-contrib
Example 1: In this example, we can see that by using _.iterators.mapcat() method, we are able to get the function iterator which can generate the value after mapping with the unary function by using this method.
1 1 2
0 1 0 0 0