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Lodash _.takeSkipping() Method

  • Last Updated : 14 Sep, 2020

The Lodash _.takeSkipping() method takes an array and a skip value (say n) and creates an array containing every nth element of the original array.

For an index >= 0 first element of the new array is always the same as the first element of the original array.

Syntax:

_.takeSkipping(array, skip_value)

Parameters: This method takes two parameters as mentioned above and described below:

  • array: The array from which the skip array is to be made.
  • skip_value: The value which is used to make skip array from the original array.

Return Value: This method returns a newly created skip array.



Note: This will not work in normal JavaScript because it requires the lodash contrib library to be installed. 

Module Installation: Lodash contrib library can be installed using the following command:

npm install lodash-contrib –save

Example 1: In this example, we will generate a skip array using this method.




// Defining lodash contrib variable 
var _ = require('lodash-contrib'); 
  
// Array
var array = [1, 2, 3, 4, 6, 4, 3, 10];
  
// SkipValue
var skip = 2;
  
// Generating Array using takeSkipping() method
var arr = _.takeSkipping(array, skip);
  
console.log("Array : ", array);
console.log("Skip Value : ", skip);
console.log("Generated Array : ", arr);

Output: Generated skip array contains the (n+2)th indexed element.

Array :  [
  1, 2, 3, 4,
  6, 4, 3, 10
]
Skip Value :  2
Generated Array :  [ 1, 3, 6, 3 ]

Example 2: This method is safe for skip values greater or lesser than the array size.




// Defining lodash contrib variable 
var _ = require('lodash-contrib'); 
  
// Array
var array = [1, 2, 3, 4, 6, 4, 3, 10];
  
// SkipValue
var skip = 10;
  
// Generating Array using takeSkipping() method
var arr = _.takeSkipping(array, skip);
  
console.log("Array : ", array);
console.log("Skip Value : ", skip);
console.log("Generated Array : ", arr);

Output: Only the first element or 0th indexed element is in the generated array.

Array :  [
  1, 2, 3, 4,
  6, 4, 3, 10
]
Skip Value :  10
Generated Array :  [ 1 ]

Example 3: For negative skip value it returns an empty array.




// Defining lodash contrib variable 
var _ = require('lodash-contrib'); 
  
// Array
var array = [1, 2, 3, 4, 6, 4, 3, 10];
  
// skipValue
var skip = -10;
  
// Generating Array using takeSkipping() method
var arr =_.takeSkipping(array, skip);
  
console.log("Array : ", array);
console.log("Skip Value : ", skip);
console.log("Generated Array : ", arr);

Output:

Array :  [
  1, 2, 3, 4,
  6, 4, 3, 10
]
Skip Value :  -10
Generated Array :  []



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