const value = arr.find(test) — return the value that passes your test function for when you need to run a test to determine which value you want const bool = arr.some(test) — return true if at least one element passes your test for when you need to see if anything in your array passes your test function const bool = arr.includes(value) — check if a value exists in an array for when you already know the value and you want to check if the array has a copy Answer from ChaseMoskal on reddit.com
Medium
medium.com › poka-techblog › simplify-your-javascript-use-some-and-find-f9fb9826ddfd
Simplify your JavaScript – Use .some() and .find() | by Etienne Talbot | poka-techblog | Medium
September 5, 2019 - As for .some() , you are clearly checking if the array contains items that fit your needs or not. Make your code clearer! Use .find() and .some() when relevant. Hopefully you’ve learned something new. Share the knowledge with your fellow developers! Do you know of more JavaScript gems that could help the JS community write cleaner, simpler code?
Reddit
reddit.com › r/learnjavascript › what is the correct situation to use array.find() vs. array.includes vs. array.some() ?
r/learnjavascript on Reddit: What is the correct situation to use array.find() vs. array.includes vs. array.some() ?
September 14, 2019 -
I understand how each of these methods work, but they all seem to have similar functions to one another, and I'm not sure as to what situation might call for what method.
Top answer 1 of 3
35
const value = arr.find(test) — return the value that passes your test function for when you need to run a test to determine which value you want const bool = arr.some(test) — return true if at least one element passes your test for when you need to see if anything in your array passes your test function const bool = arr.includes(value) — check if a value exists in an array for when you already know the value and you want to check if the array has a copy
2 of 3
1
Use find when you actually need the first element that matches to be returned. Sure you could check to see if the result of find was not undefined and in that way it's similar to some. But sometimes you want the array element returned and sometimes you JUST need to know if it exists. includes is actually pretty different from both of these and is useful for arrays with simple values. Most of the time in production code I deal with arrays of objects and want to pass a function as a truth test to really dig into the contents of the object. If it's a simple array of strings or numbers then sure includes might be all you need.
Videos
06:03
Array Filter vs. Array Find in JavaScript - YouTube
01:37
What Is The Array Some Method In Javascript? - YouTube
06:22
Array Iteration: 8 Methods - map, filter, reduce, some, every, ...
01:45
JavaScript Tip: .includes() vs .some() – Find values & objects ...
.some() vs .find() in Javascript || some() in Js || find() in js ...
MDN Web Docs
developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › Array › some
Array.prototype.some() - JavaScript | MDN
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.
Top answer 1 of 2
42
Their performance characteristics are probably the same, assuming you want to know wether to use find or some in a specific case. They are both lazy in the same way.
The difference is in the output. find will return the value, some will return a boolean.
I checked the source (1.4.4). some and find both use some (=== any) internally. So even if a native implementation of some is used it benefits both find and some.
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4
If you look into it's source, you will find that those two are identical, _.find actually calls _.some.
_.find = _.detect = function(obj, iterator, context) {
var result;
any(obj, function(value, index, list) {
if (iterator.call(context, value, index, list)) {
result = value;
return true;
}
});
return result;
};
var any = _.some = _.any = function(obj, iterator, context) {
iterator || (iterator = _.identity);
var result = false;
if (obj == null) return result;
if (nativeSome && obj.some === nativeSome) return obj.some(iterator, context);
each(obj, function(value, index, list) {
if (result || (result = iterator.call(context, value, index, list))) return breaker;
});
return !!result;
};
LinkedIn
linkedin.com › pulse › understanding-distinction-arraysome-vs-arrayfind-shuaibu-muhammad-20j9f
Understanding the Distinction: Array.some() vs. Array.find() in JavaScript
February 26, 2024 - Array.find() for Specific Values: On the other hand, Array.find() is ideal when you're searching for a particular element in an array based on a condition and need the value of that element.
Quora
quora.com › What-is-the-correct-situation-to-use-array-find-vs-array-includes-vs-array-some-in-JavaScript
What is the correct situation to use array.find() vs. array.includes vs. array.some() in JavaScript? - Quora
Answer (1 of 2): includes: this is syntactic sugar for the old common way of writing [code]myArray.indexOf('some value') !== -1 [/code]Which can now be written as [code]myArray.includes('some value') [/code]It simply checks to see if some value exists in the array and returns true if it does. ...
MDN Web Docs
developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › Array › find
Array.prototype.find() - JavaScript | MDN
If you need to find if a value exists in an array, use includes(). Again, it checks each element for equality with the value instead of using a testing function. If you need to find if any element satisfies the provided testing function, use some().
Medium
acharyan.medium.com › javascript-array-fundamentals-find-vs-filter-vs-findindex-vs-some-vs-every-905273dde9fa
Search in Javascript Array : Find Vs Filter Vs FindIndex Vs Some Vs Every | Medium
August 30, 2021 - Use case 3: FindIndex : Use array ‘findIndex’ method to traverse through the array to get an integer result of ‘index number’ when the condition matches for any entity for first time else returns ‘-1’. Loop executes only till the first match. CallbackFn is run even for indexes with unassigned values. ... Use case 4: Some : Use array ‘some’ method to traverse through the array to get a result of boolean true if the condition matches for any entity else returns false.
LinkedIn
linkedin.com › pulse › java-script-bits-array-methods-some-vs-every-
Java Script Bits - Array Methods - some vs every vs find vs filter
August 12, 2022 - If there is no apple in the array, and empty array will be returned. fruitBasket1.filter( fruit => { console.log(fruit); return fruit === ‘apple’ }) Will output below apple apple apple [apple, apple, apple] // this is return result fruitBasket3.filter( fruit => { console.log(fruit); return fruit === ‘apple’ }) Will output below mango orange orange orange [] // this is return result · Now, we learned where to use some vs every vs find vs filter while working with Javascript arrays.
MeasureThat
measurethat.net › Benchmarks › Show › 4337 › 0 › array-find-vs-some
Benchmark: array find vs some - MeasureThat.net
JavaScript benchmarks, JavaScript performance playground. Measure performance accross different browsers. javascript benchmarks online.
W3Schools
w3schools.com › jsref › jsref_some.asp
JavaScript Array some() Method
The some() method checks if any array elements pass a test (provided as a callback function).
Medium
medium.com › @obsidianart › javascript-array-methods-find-some-and-findindex-explained-6dbd3adbb33e
JavaScript array methods: find, some, and findIndex explained | by Obsidianart | Medium
August 4, 2024 - Well, JavaScript is a language ... easier to read in the future. But if you care about the actual element, you can use find to get the element itself, or undefined if it doesn't exist....
Educative
educative.io › answers › filter-vs-find-javascript-array-methods
filter vs. find: JavaScript array methods
The JavaScript array method find returns the first matching element, while the array method filter returns an array of all matching elements.
CoderPad
coderpad.io › blog › development › javascript-some-method
JavaScript .some() Method: When and How to Use It - CoderPad
June 5, 2023 - The .every() method returnstrue if every array element passes the provided condition, stops execution, and returns false the moment even one element does not fulfill the condition. On the other hand, the .find() method returns the first element that satisfies the provided condition. Because of this, it’s similar to the functionality of the .some() method.
freeCodeCamp
freecodecamp.org › news › heres-how-you-can-make-better-use-of-javascript-arrays-3efd6395af3c
Here’s how you can make better use of JavaScript arrays
August 25, 2018 - In the previous case, we saw Array.find requires a callback as an argument and returns an element. Is Array.find the best solution if we need to know whether our array contains a value or not? Probably not, because it returns a value, not a boolean. For this case, I recommend using Array.some which returns the needed boolean.
MeasureThat
measurethat.net › Benchmarks › Show › 5921 › 0 › some-vs-find
Benchmark: Some vs Find - MeasureThat.net
JavaScript benchmarks, JavaScript performance playground. Measure performance accross different browsers. javascript benchmarks online.
Medium
medium.com › coding-in-depth › when-to-use-every-some-any-foreach-and-map-in-javascript-9ed598010946
When to use every(), some(), any(), forEach() and map() in JavaScript | by Coding In depth | Coding In Depth | Medium
August 8, 2020 - These methods help in finding output based on the input provided. There are plenty of articles but they are not focused on practical implementation. ... Check the attached stackblitz project. Is Array.any() exist in the JavaScript? The answer is no. However, Array.some() do the purpose of getting any elements.
freeCodeCamp
freecodecamp.org › news › find-vs-filter-javascript
find() vs filter() in JavaScript – Differences Explained with Examples
October 14, 2022 - When you have a use case where ... can use the filter() method. But if you expect only a single element to be returned from the array, then you can use find() and avoid extra iterations....