The _.pullAllBy() method is used to remove the values from the original array by iterating over each element in the array by using the Iteratee function. It is almost the same as _.pullAll() function.
Syntax:
_.pullAllBy(array, values, [iteratee=_.identity])
Parameters: This method accepts two parameters as mentioned above and described below:
- array: This parameter holds the array that needs to be modified.
- values: This parameter holds the values in an array that needs to be removed from the first array.
- Iteratee: This is the function that Iteratee over each element.
Return Value: It returns an array.
Note: If the iteratee function is not given then _.pullAllBy() function act as _.pullAll() function.
Example 1:
Javascript
// Requiring the lodash library const _ = require("lodash"); // Original array let array1 = [1, 2, 3, 4.2] // Array to be subtracted let val = [2, 3, 3, 5]// Printing the original array console.log("Before : ", array1); // Array after _.pullAllBy() // method where Math.double is the // comparable function _.pullAllBy(array1, val, Math.double); // Printing the output console.log("After : ", array1); |
Output:
Example 2:
Javascript
// Requiring the lodash library const _ = require("lodash"); // Original array let array1 = [1, 2, 3, 4.2] let array2 = [1, 2, 3, 4.2] // Value array to be subtracted let val = [2, 3, 4, 5] // Printing the original array console.log("Before : ", array1); // Array after _.pullAllBy() // method where Math.double is the // comparable function _.pullAllBy( array1, val, Math.floor); // Array after _.pullAllBy function // where no comparable function is given _.pullAllBy(array2, val); // Printing the output console.log("When compare funct is given: ", array1); // Printing the output console.log("When compare funct is not given: ", array2); |
Output:
Note: This will not work in normal JavaScript because it requires the library lodash to be installed.
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