The some() method of Array instances returns true if it finds an element in the array that satisfies the provided testing function. Otherwise, it returns false.

The some() method checks if any array elements pass a test (provided as a callback function).

We have then passed callback to the some() method as ageArray.some(checkMinor) that checks for elements less than 18 and returns true. // array of scores obtained by student let scoreObtained = [45, 50, 39, 78, 65, 20]; // a test function: returns score less than 40 function studentIsPassed(score) ...

November 8, 2024 - In this tutorial, you will learn how to use the JavaScript Array some() method to test if at least one element in the array passes a test.

September 1, 2008 - After executing the above program, the some() method returns "true" because at least one element (2) in the numbers array is positive. ... In this example, we are checking for atleast one string element that has a lenght of '5'.

December 18, 2016 - If some element passes the test, then it returns true, otherwise false. function isBigEnough(element, index, array) { return (element >= 10); } var retval = [2, 5, 8, 1, 4].some(isBigEnough); console.log("Returned value is : " + retval ); var ...

September 5, 2019 - Well, you pass .some() a function as the argument. That function runs for each value in the array. You can then see if the value fits the condition you’ve written. The function must return a boolean (although a truthy/falsy value works as well). As soon as one true is returned, .some() will itself return true.

October 15, 2024 - In addition to the callback function, some() can also take in a context object. ... We can then refer to the object from inside the callback function on each iteration, using this as a reference. This allows us to access any properties or methods defined inside the context object. In this example, we are looking to check if at least one person in the people array is a tricenarian.

function isNegative(element, index, array) { return element < 0; } const int8 = new Int8Array([-10, 20, -30, 40, -50]); const positives = new Int8Array([10, 20, 30, 40, 50]); console.log(int8.some(isNegative)); // Expected output: true console.log(positives.some(isNegative)); // Expected output: false

November 4, 2024 - To use the JavaScript Array.prototype.some method, can declare the test inside a callback function, so that we can pass it to some() at invocation. For example, as in the case below for checking if a number in the array is even or not:

This function calls a given closure/function with every element in a given array and returns true, if one of the closure calls returns true. array.some( closure=function, parallel=boolean, maxThreads=number )

Give the live Array Some demo a try, you can toggle promo: true to promo: false and see the result change: Let’s check out a for...in loop example that mimics the behaviour of Array Some:

July 12, 2024 - Example: In this example the Function checkAvailability checks if a value exists in an array using some().

July 16, 2025 - Nowadays known as one of the most familiar Arrays methods to test in Javascript we have the Array Some method. What some() method performs is testing whether at least one element of the array matches the test executed by our custom function.

The some() method executes a user-provided callback function on each element of the array until it finds one where the callback returns a truthy value. If such an element is found, some() immediately returns true; otherwise, it returns false.

If such an element is found, some() immediately returns true. Otherwise, some() returns false. callback is invoked only for indexes of the array with assigned values.

Other methods mutate the array that the method was called on, in which case their return value differs depending on the method: sometimes a reference to the same array, sometimes the length of the new array.

June 12, 2023 - In the first checkUsers function, we use a for loop to iterate through the users array and manually update the allAdults and anyFromNewYork variables. This approach is more complex and harder to read. In the second checkUsersWithSomeAndEvery function, we use the every and some methods to achieve the same result.

The some method takes one callback function, which can have 3 different arguments: element - the element being iterated over. In the example above, I’ve named it x. index - the index of array element we are iterating over currently.

December 15, 2025 - The most important part is the callbackFn, which is usually an arrow function: ... const ages = [12, 18, 5, 25, 10]; // Check if at least one person is 18 or older const isAdultPresent = ages.some(age => age >= 18); console.log(isAdultPresent); ...