Every() and Some() functions in JavaScript - #54 #JavaScript #Programming

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Introduction :
The every() and some() functions in JavaScript are used to test whether all or some elements in an array satisfy a specified condition. Here's an overview of each function:

every() Function:
Description : The every() function tests whether all elements in an array pass a provided function's test. It returns true if all elements pass the test, otherwise false.

Syntax:
JavaScript code:
callback: A function to test for each element.
element: The current element being processed in the array.
index (Optional): The index of the current element being processed.
array (Optional): The array every() was called upon.
thisArg (Optional): Object to use as this when executing the callback function.

Example:
JavaScript code
const numbers = [1, 2, 3, 4, 5];

// Check if all numbers are greater than 0

// Check if all numbers are even
some() Function:
The some() function tests whether at least one element in the array passes the provided function's test. It returns true if at least one element passes the test, otherwise false.

Syntax:
JavaScript code:
callback: A function to test for each element.
element: The current element being processed in the array.
index (Optional): The index of the current element being processed.
array (Optional): The array some() was called upon.
thisArg (Optional): Object to use as this when executing the callback function.

Example:
JavaScript code:
const numbers = [1, 2, 3, 4, 5];

// Check if at least one number is negative

// Check if at least one number is even
In both examples, the every() and some() functions return boolean values based on the conditions specified in the callback functions.

Chapter :
00:00 Introduction
00:21 Syntax - Every() function
01:02 Example - Every() function
01:23 Syntax - Some() function
01:51 Example - Some() function
02:19 Summery

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