The _.isSequential() Method checks whether the given value is a Sequential composite type value or not, Exp. arrays, arguments, etc. correspondingly returning a boolean value.
Syntax:
_.isSequential(value);
Parameters: This method accepts a single parameter as mentioned above and described below:
- value: Given value to be checked for Sequential value.
Return Value: This method returns a Boolean value(Returns true if the given value is Sequential, else false).
Note: This will not work in normal JavaScript because it requires the underscore.js contrib library to be installed.
underscore.js contrib library can be installed using npm install underscore-contrib –save.
Example 1:
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib');
// Checking console.log("The Value is Sequential : " +_.isSequential([1, 2, 3, 4]));
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Output:
The Value is Sequential : true
Example 2: A mapping returns false.
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib');
// Checking console.log("The Value is Sequential : " +_.isSequential({1:2, 3:4}));
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Output:
The Value is Sequential : false
Example 3: For string, this method returns false
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib');
// Checking console.log("The Value is Sequential : " +_.isSequential("Geeks"));
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Output:
The Value is Sequential : false