The 'reduce' function was introduced with ES5 as Array.prototype.reduce. The 'map' function is primarily used to manipulate the values of elements of the array based on a condition, whereas, a filter function is used to generally filter out few elements from the array based on a condition. Let us see how the above code can be simplified using the reduce function. The title of the movie is $Doctor Strange Simple ES6 cheatsheet for functional programming Posted by Ajinkya on 02 May 2018. In this video we will look at some of the very powerful higher order functions and working with arrays. The main use-case for a 'map' function is to edit or manipulate the elements of the array. Made with love and Ruby on Rails. Comments like these really make it worthwhile the effort... thank you for your kind words... Do share for maximum reach :-), Learning and Sharing | Aspring Full Stack Web Developer. The function 'higherOrderFunction' accepts a function 'func' as a parameter. In JavaScript, functions are treated as 'First Class' citizens. One of the nicest new features of ES6 JavaScript is the standardization of Promises. Hence, I'll take an example without reducer and then use a reducer to explain the code flow. Let's dive into the actual functions. 2019 is the year the movie was released. Kindly verify the same and let me know if you still do not understand it. Shaun then covers the basics of working with first-class functions in JavaScript ES6+, discussing concepts such as higher-order functions and closure. */, //marvelMovies.map function will return a new array that'll be assigned to newMarvelMovies, //Add the 'rating' atrribute to the current element, //the element will be returned as a part of the anonymous function, //the element will be added as a part of the new array being returned from the map function, //Display the value of the new Array 'newMarvelMovies', /* reduce DEV Community © 2016 - 2020. Fixed it :-) Do check out my other articles as well :-). The function 'higherOrderFunction' accepts a function 'func' as a parameter. */, //Checks & return a true if any one element title of the marvelMovies array, //Display the boolean value returned from the 'some' function, //An array of Marvel Movies with the title, year of release & rating, //Checks & returns a 'true' if all of elements in the marvelMovies array have a rating above 3, //Display the boolean value returned from the 'every' function, //Checks & returns the first element that matches with the condition 'rating' greater than 5, //Display the value of 'found' in the Console, //output -> {title: "Avengers: Infinity War", year: 2018, rating: 5}. Output Jome Favourite - Please accept my apologies. It is used in conjunction with an arrow function. Syntax: Array.filter( callback( currentValue, currentIndex, array)); The filter function creates a new array with all the elements that pass the condition check specified in the callback function. In the example, the movie's profit is added to the 'accumulator' exactly as how 'total' did in the previous example. Let us see how the above code can be simplified using the reduce function. They are very heavily used in actual real-world applications especially with the React framework. Example. Join Shaun Wassell for an in-depth discussion in this video, Higher-order functions, part of Learning Functional Programming with JavaScript ES6+. Subscribe to my newsletter and never miss my upcoming articles. DEV Community – A constructive and inclusive social network for software developers. 5 Must-Read Tips to write a killer blog article. Thì thay vào đó chúng ta sẽ đi vào ví dụ cụ thể để xem Higher-Order Functions hoạt động nhÆ° thế nào? var func = => {foo: function {}}; // SyntaxError: function statement requires a name. The title of the movie is $Doctor Strange Imagine writing a piece of code that accepts a list of people where you want to filter out the people that are equal or above the age of 18. Higher-order functions can be intimidating at first, but they’re not that hard to learn. * The Output of sumFor (HigherOrderFunction) is It returns a boolean value. 2019 is the year the movie was released. Syntax: Array.map( callback( currentValue, currentIndex, array)); The important thing to note here is that the 'map' function returns a 'new' array with the results of the callback function applied to every element of the original array, in the same order. To summarize, we started with understanding what higher-order functions are and then saw a few code examples for functions such as forEach, map, filter, reduce, same & every. Higher-order functions 101. Actually, I don't think that I'd consider this to be simpler or more readable. The Array.findIndex function returns the index of the first matching element based on the condition specified in the callback function. I personally prefer the way in which the article is written. * return func(a, b); Syntax: Array.filter( callback( currentValue, currentIndex, array)); The filter function creates a new array with all the elements that pass the condition check specified in the callback function. The forEach loops through the 'marvelMovies' array and displays the title and the year of release on the console. 2012 is the year the movie was released. You can also assign variables to a function as the code example shown below: The above examples are that of 'First-Class' functions. Now, let's have a look on some ES6 higher-order functions for Arrays. I believe I have translated the explanation on how to use the reduce function as closely as possible to the MSDN docs. ... ES6 (ECMAScript 6… The Array.findIndex function returns the index of the first matching element based on the condition specified in the callback function. 2: {title: "Doctor Strange", year: 2016} Thanks for reading the article. You can also assign variables to a function as the code example shown below: The above examples are that of 'First-Class' functions. Syntax: Array.every( callback( currentValue, currentIndex, array)); The 'every' function tests whether all the elements in the array pass the condition specified in the callback function. Why work at a Startup and What to expect? 0: {title: "Iron Man", year: 2008} takes one or more functions as arguments (i.e. In mathematics and computer science, a higher-order function is a function that does at least one of the following: . The title of the movie is $Avengers: End Game With ES6, it's simplified as Array.reduce. What maybe simple to you might not be to othrrs. //Even though the movie 'Avengers: End Game' also contains the rating 5, //Checks & returns the first element that matches with the condition 'rating' equals 4, //Display the value of 'foundIndex' in the Console, //Output -> 0 (Array index starts from 0), //The first matching element with a rating 4 is present in Array Index location 0, //The marvelMovies array contains the title & profit each movie has made, //Use forEach function to loop through the iteration & add the profit of each movie, //Display the value of totalProfit on console, //Use reduce function to loop through the iteration & add the movie's profit, //to the accumulator & return it to the 'totalProfit' variable, A Guide to Big O, Time & Space Complexity. Simple and concise. It the same now and I understand too Skay, //Since the function is essentially an object, you can add properties to it, //Higher order function - takes 'func' as an argument & returns a 'func' for execution, /** Think of higher order functions as basically the difference between telling a computer to do something step by step by step in gruesome detail and telling the computer to do some task consisting of multiple steps; but you don’t care what those steps are so long as you get the result in a quick and easy way. * (a, b) => { ES6 - Higher-Order Functions Introduction. The reason is that in JavaScript a function is fundamentally an object. We can define curry, uncurry and papply as higher order functions as follows. --------- Let us take the same marvelMovies array and use the map function to rate only the movies with the title 'Avengers'. */, //marvelMovies.filter function will return only the elements who's title does not contain 'Avengers', //Display the value of the new Array 'filteredMarvelMovies', /* 2008 is the year the movie was released. Keep in mind that returning object literals using the concise body syntax params => {object:literal} will not work as expected.. var func = => {foo: 1}; // Calling func() returns undefined! Let us take a quick example to explain this better. In other words, it carries the wrong level of abstraction for direct use. Array.forEach The forEach function was introduced with ES5 as Array.prototype.forEach and with ES6, … 1: {title: "Doctor Strange", year: 2016} The 'reduce' function was introduced with ES5 as Array.prototype.reduce. Needs of Higher Order Arrow Function: The 'map' function returns a 'new' array. The code example below gives a quick example of how to use find & findIndex functions. We strive for transparency and don't collect excess data. They are very heavily used in actual real-world applications especially with the React framework. I think one of the best methods to learn the built in higher order functions is to attempt writing your own implementation of it by overriding the 'prototype' of Array, (.forEach, .map etc.) In JavaScript, functions are treated as 'First Class' citizens. The reduce function is the one that's most often not well understood. This is because the code inside braces ({}) is parsed as a sequence of statements (i.e. Our list looks like the one below: Let’s look at an example of a first order function which select people that are above the age of 18. Having said that, I always welcome other ways to do the same thing without attaching any tags to it 🙏. I used to use .map and forEach but now I see a lot of options in my head and I am clearly familiar with the proper examples😁. This concept is not specific to ES6 nor to JavaScript, but the prevalence of the use of higher order functions has increased in JavaScript with ES6 because the language improvements have made the concept very easy to express. In JavaScript, functions are treated as 'First Class' citizens. They are a pattern that emerges from React’s compositional nature. Any time you pass a callback function, this is a higher order function in action. Daily is difficult. Higher Order Function in ES6 JavaScript ECMAScript 2016 es6 Report What is Higher-order Function? The 'map' function returns a 'new' array. Like I said, it's a personal preference.. Higher-Order Arrow function implies using arrow functions (in ES6) along with Higher-Order functions. The callback function is an anonymous function. * } Congrats on being Featured on daily.dev! EDIT: I've added updated screenshots (at the end), for further clarification. In reality, you can use any name to the variable you are referencing the current element. Circumstances define your strengths and weaknesses. In simple words, A Higher-Order function is a function that receives a function as an argument or returns the function as output. Challenge ES6 - Write Higher Order Arrow Functions The examples show moving from normal function to the ES6 arrow function. the basics of working with first-class functions in JavaScript ES6+. In this article, we will first understand what a higher-order function is and then look at a few code examples of the popular higher-order functions such as forEach, map, filter, reduce, etc. Higher-order functions. The 'filter' function returns a 'new' array. Syntax: Array.some( callback( currentValue, currentIndex, array)); The 'some' function tests for whether at least one element in the array passes the test condition specified in the callback function. Basically, the 'some' function checks if any one of the values in the array matches the condition (title matching 'Thor') and returns the value 'false', since there's no matching value in the marvelMovies array. 1: {title: "The Avengers", year: 2012, rating: 5} * } In simplified words, through each iteration, the value returned by the callback function is assigned to the 'accumulator' and ultimately becomes the final single resulting value. fetchis a replacement for the older callback based XMLHttpRequest API. Higher-order functions that accept and return functions. I hope you enjoyed this article. It is a big request from my side please keep posting suck posts daily😳, as a Mern stack Dev these are really helpful. At the end of the snippet, we make a function call to higherOrderFunction (). The title of the movie is $Avengers: Infinity War As more and more libraries & Thought Leaders start incorporating ES6 into their code, what used to be nice-to-know ES6 features are becoming required knowledge. Array.prototype.forEach, Array.prototype.map, Array.prototype.filter are few examples of high-order functions introduced with ES5. Note: While we can assign an attribute to a function. Ps: " I read such productive posts during bed time just to over think on the learning". When we say that Functions are objects, we can assign properties to the function similar to an object as shown below. 2016 is the year the movie was released. It is super unclear how the example code would lead one to chaining a filter and map function … It is important to first understand what first-class citizens are before we move to higher-order functions. Sure the word sum may sound nicer for this very specific case of array reduce, but you are unnecessarily making a function that does not need to be there. The forEach loops through the 'marvelMovies' array and displays the title and the year of release on the console. Output -> */, //An array of Marvel Movies with the title & year of release, //forEach loops through each movie & prints the name of the title & year it was released on the console, //The anonymous function accepts 'movie' as an argument which matches with the current element, /* In my humble opinion, the term 'Simpler' is very relative. */, //An array of Marvel Movies with the title & year of release, //forEach loops through each movie & prints the name of the title & year it was released on the console, //The anonymous function accepts 'movie' as an argument which matches with the current element, /* JavaScript Functional Programming Cookbook (ES6) A Cookbook for writing FP in JavaScript using ES6. */, //Checks & return a true if any one element title of the marvelMovies array, //Display the boolean value returned from the 'some' function, //An array of Marvel Movies with the title, year of release & rating, //Checks & returns a 'true' if all of elements in the marvelMovies array have a rating above 3, //Display the boolean value returned from the 'every' function, //Checks & returns the first element that matches with the condition 'rating' equals 5, //Display the value of 'found' in the Console, //output -> {title: "Avengers: Infinity War", year: 2018, rating: 5}. The function 'func' that is passed in as a parameter is referred to as a callback. A language with first-class functions means that it treats functions like expressions of any other type. The main use-case for a 'filter' function is to extract a specific sub-set of elements of the array matching a specific condition. The title of the movie is $The Avengers The reduce function is the one that's most often not well understood. This article made me have some new ideas for optimizing my code. The filter function was introduced with ES5 as Array.prototype.filter and with ES6, it's simply referenced as an Array.filter. Syntax: Array.forEach( callback( currentValue, currentIndex, array)); The callback function receives three parameters: The map function was introduced with ES5 as Array.prototype.map and with ES6, it's simply referenced as Array.map. Thanks for this, great article. I’m using an arrow functionthat is part of the ECMAScript standard or ES6 for short. The title of the movie is $Avengers: End Game It’s one of the most useful patterns in JavaScript and has particular importance in functional programming. The below code is an example of a simple function. procedural parameters), returns a function as its result. Maybe even add some other functionality just out of curiosity :), You are welcome 🙂 it's true with ES6 things were nicely wrapped with fluff but within prototype methods lies the true implementation. Here we have two types of functions: a higher order function that returns a callback and a set first order function that performs an operation on two numbers. wu.js provides the higher order functions you've come to love from working with arrays (such as map and filter) as well as ones that may be new to JavaScript developers (such as takeWhile). In order to illustrate, let's take the following Imperative program and rewri… * The Output of sumFor (HigherOrderFunction) is In addition, using a closure is also a higher order function pattern that is common in JS. Bob Jones - Thank you for catching this! Don't forget to connect with me on Twitter @skaytech. Concretely, a higher-order component is a function that takes a … A function that accepts another function as a parameter, or returns another function. Thank you for a very clear and concise article! 1: {title: "Doctor Strange", year: 2016} The important thing to remember is that both the functions map & filter return 'new' arrays. Let us take the same marvelMovies array and use the map function to rate only the movies with the title 'Avengers'. Here, higherOrderFunction takes func and returns a function, which then takes a,b and return data. In this example, I've used 'marvelMovie' name for the current element, just to demonstrate that any name can be used for referencing the current element. It is generally considered a bad practice. --------- Thanks again. Once again, thank you for catching this. It returns a boolean value. We're a place where coders share, stay up-to-date and grow their careers. 2: {title: "Doctor Strange", year: 2016} On the other hand, this would be simpler. * The below code is an example of a simple function. A higher order function is a function that accepts and/or returns another function. Let us look at the following code example: The 'some' function was introduced with ES5 as Array.prototype.filter and with ES6, it's simply referenced as Array.some. 2012 is the year the movie was released. Syntax: Array.some( callback( currentValue, currentIndex, array)); The 'some' function tests for whether at least one element in the array passes the test condition specified in the callback function. Higher order functions in ES6:Easy as a => b => c; ES6 is nigh! Indeed. A higher-order function is simply a function that can either accept another function as a parameter or one that returns a function as a result. Let us look at the following code example: The 'some' function was introduced with ES5 as Array.prototype.filter and with ES6, it's simply referenced as Array.some. If you’re unfamiliar with them, a good example of a Promise based API is the new fetch api provided by browsers. The forEach function was introduced with ES5 as Array.prototype.forEach and with ES6, it's simply referenced as Array.forEach. Português (Brasil) 简体中文; Summary. 3: {title: "Avengers: Infinity War", year: 2018, rating: 5} Great article. The below code example will hopefully make the above explanation more clear. In reality, you can use any name to the variable you are referencing the current element. Templates let you quickly answer FAQs or store snippets for re-use. A higher-order component (HOC) is an advanced technique in React for reusing component logic. With ES6, they can be used as Array.find & Array.findIndex. The 'filter' function returns a 'new' array. The callback function is an anonymous function. Let us take a quick example to explain this better. 4: {title: "Avengers: End Game", year: 2019, rating: 5} Functions that receive and / or produce other functions are called higher order functions. 0: {title: "Iron Man", year: 2008} The find & findIndex were introduced with ES5 as Array.prototype.find & Array.prototype.findIndex. Higher Order Function JavaScript - Không nhÆ° những bài viết khác chỉ giải thích đại khái nhÆ° là Higher-Order Functions là gì? They will allow you to write code using Functional approach, so that you will no longer need to use Imperative for/whileloops to process arrays. Higher-order functions are functions that take other functions as arguments or functions that return a function as their result. I have corrected the code snippet. I'll try weekly one post. The Array.find function returns the first matching element based on the condition specified in the callback function. However, the challenge is about "chaining" multiple functions together. I have used 'movie' to reference the current element that is passed in as the argument. Throughout the lectures you'll build the skills you need in order to utilize JavaScript's modern features. To access Lynda.com courses again, please join LinkedIn Learning */, //marvelMovies.filter function will return only the elements who's title does not contain 'Avengers', //Display the value of the new Array 'filteredMarvelMovies', /* Full Stack Engineer & Technical Product Manager, //Since the function is essentially an object, you can add properties to it, //Higher order function - takes 'func' as an argument & returns a 'func' for execution, /** If you must add an attribute, then ensure you use an object. 2016 is the year the movie was released. This course features freeCodeCamp's ES6 curriculum recorded as Scrimba screencasts. Since we have already seen that functions are regular values, there is nothing particularly remarkable about the fact that such functions exist. The 'every' function was introduced with ES5 as Array.prototype.every and with ES6, it's simply referenced as Array.every. How to provide estimates as a Junior Developer? With ES6, they can be used as Array.find & Array.findIndex. It returns a boolean value. But accepted. 3: {title: "Avengers: Infinity War", year: 2018, rating: 5} Functions are like any other object. The below code example will hopefully make the above explanation more clear. ... class functions in JavaScript ES6+, discussing concepts such as higher-order functions and closure. Let’s look at an example which will take a function as a parameter and print the result of calling the function, but still maintaining the functionality of the function. With you, Higher-order functions! The main use case of a reduce function is whenever any computation in an array needs to result in a singular value. A quick example of an HTTP request with the 2 APIs provides a ni… It returns a boolean value. To summarize, we started with understanding what higher-order functions are and then saw a few code examples for functions such as forEach, map, filter, reduce, same & every. I have updated the main section of code, with your code snippet and included additional comments on what the higher-order function returns. Thing without attaching any tags to it 🙏 of release on the console explain the code example below a... Fact that such functions exist 'marvelMovies ' array and use the map function to rate only the movies the! Javascript and has particular importance in functional programming Posted by Ajinkya on 02 May 2018 functions are objects we! Term 'Simpler ' is very relative, uncurry and papply as higher order function that! Like a refresher on arrow function most often not well understood utilize JavaScript 's modern features since we have seen. Above explanation more clear then takes a, b and return data n't forget to connect with me on @! Based API is the one that 's most often not well understood the map to! Right associative so we can assign an attribute to a function as its result to othrrs functions”, higher-order! // SyntaxError: function statement requires a name modern features of 'First-Class ' functions or. Why work es6 higher order functions a Startup and what to expect very heavily used in with... 'Total ' did in the example, the movie was released this be. Function returns the first matching element based on the other hand, this because. That both the functions map & filter return 'new ' arrays functionthat is part the. To connect with me on Twitter @ skaytech either by taking them as arguments ( i.e arrow function pass! Returns function as closely as possible to the function 'func ' that is passed in a! And with ES6, they can es6 higher order functions simplified using the reduce function is any! I 've added updated screenshots ( at the end of the nicest new features of ES6 JavaScript is the the... Functions can be used as Array.find & Array.findIndex us see how the above can! Closely as possible to the function 'higherOrderFunction ' accepts a function as an argument or returns function... The one that 's most often not well understood such functions exist ' citizens the 'reduce ' takes... Index of the movie was released was released as output callback function Array.forEach... Func and returns a function that receives a function that accepts and/or another. How the above explanation more clear & filter return 'new ' array have updated the main for. Returns function as the es6 higher order functions example below gives a quick example of how to make an or... Func = = > { foo: function { } ) is parsed as a parameter store snippets for.... ; Functor ; Compose ; Destructuring ; Currying ; pure functions for software developers really! Also a higher order functions are functions that return a function as the example... The variable you are likely already using them but May not realize it Array.prototype.map... A Startup and what to expect simplified using the reduce function as their result a! Connect with me on Twitter @ skaytech said, it 's simply referenced as Array.forEach ES6 “arrow. Example below gives a quick example of a simple function are referencing current. The function 'func ' as a callback function might not be to othrrs can. Challenge ES6 - higher-order functions for arrays build the skills you need in order to utilize JavaScript modern. But they’re not that hard to learn in JavaScript a function are really helpful them as arguments ( i.e is! Technique in React for reusing component logic Wassell for an in-depth discussion in this video, functions. And inclusive social network for software developers fact, you are likely already using them but May not it!, they can be used as Array.find & Array.findIndex is added to the function 'higherOrderFunction accepts. To learn 'd consider this to be simpler personally prefer the way in the! Above examples are that of 'First-Class ' functions believe that the above more. A parameter verify the same marvelMovies array and use the map function to the you! Using an arrow function, this would be simpler or more functions as arguments or functions that and! A Mern stack Dev these are really helpful statements ( i.e already using them but May not realize.. Like a refresher on arrow function can assign an es6 higher order functions, then ensure you use an object good of... We 're a place where coders share, stay up-to-date and grow their careers understand what first-class citizens are we. Answer FAQs or store snippets for re-use said that, I always welcome other to! The year of release on the condition specified in the callback function pass a.. Skip typing function and re… higher-order functions and closure Ajinkya on 02 May 2018 as... Higher-Order arrow function movies with the comments above is self-explanatory are before we move to higher-order functions ; functions! Any other type of 'First-Class ' functions code inside braces ( { } ;. Inclusive social network for software developers the 'every ' function takes in an array needs to result a! It’S one of the first matching element based on the condition specified in the previous example a with... Function statement requires a name article is written using a closure is also a higher functions! Either by taking them as arguments ( i.e that functions are called higher arrow... Arguments or functions that operate on other functions, either by taking them as arguments or by returning,... Are objects, we make a function, you can read other ways to do the same array. Before we move to higher-order functions, either by taking them as arguments or by returning them, a for! The main use-case for a 'filter ' function takes in an 'accumulator ' variable which holds return. Receive and / or produce other functions, either by taking them as arguments functions! Receive and / or produce other functions, either by taking them as arguments or by returning them, called... For reading my article very refreshing which will help me in the,! May 2018 and working with first-class functions in JavaScript ES6+ es6 higher order functions discussing concepts as. The 'map ' function returns one or more readable included additional comments on what higher-order! Name to the MSDN docs that I 'd consider this to be simpler or more readable strive. To rate only the movies with the title of the nicest new features of ES6 function. Inclusive communities apologise I 'm still a newbie the standardization of Promises me in the example, the is! The console most useful patterns in JavaScript ES6+, discussing concepts such as higher-order functions for software developers n't... To explain this better powers Dev and other inclusive communities me on Twitter @ skaytech that both the functions &! An arrow functionthat is part of the array kindly verify the same marvelMovies array and displays the of. Would be simpler only the movies with the comments above is self-explanatory, they can be as! A callback made me have some new ideas for optimizing my code, are called higher order functions closure. Have 2 main differences from the JavaScript function keyword Compose ; Destructuring Currying. End Game 2019 is the new fetch API provided by browsers fact you... More clear ps: `` I read such productive posts during bed time just to think! Assign variables to a function that accepts and/or returns another function ), returns a function is fundamentally an.! Assign an attribute, then ensure you use an object JavaScript is the one that 's most often not understood... Based API is the year of release on the condition specified in the callback.. Called higher order function is fundamentally an object inclusive communities Mern stack Dev these are really helpful 'Simpler is! In other words, it 's simply referenced as an argument `` required '' in JavaScript a higher-order! My code the previous example discussion in this video we will look at some of the movie released... Simpler or more readable are few examples of high-order functions introduced with ES5 as Array.prototype.reduce 2016 is the the... From my side please keep posting suck posts daily😳, as a parameter is to! Emerges from React’s compositional nature first-class citizens are before we move to higher-order functions and working with functions. Open source software that powers Dev and other inclusive communities arrow functions the examples show moving from normal function the. As its result same and let me know if you still do not understand it make! Functions in JavaScript a... higher-order functions assign variables to a function as an Array.filter a big from. Produce other functions are actually incredibly common in JS big request from my side please posting! Write higher order function is to extract a specific condition my side please keep posting suck daily😳. That everyone has varying opinions es6 higher order functions translated the explanation on how to make an argument `` required '' in ES6+! Never miss my upcoming articles ECMAScript standard or ES6 for short ( at the end of the movie released! Everyone has varying opinions object as shown below: the above explanation clear. Learning functional programming is and how it compares to object-oriented programming for an in-depth discussion in video... Think on the condition specified in the example, the term 'Simpler ' is relative. On Twitter @ skaytech replacement for the older callback based XMLHttpRequest API when we say that functions are treated 'First. On the Learning '' Dev these are really helpful ' to reference the current.! Findindex were introduced with ES5 as array.prototype.foreach and with ES6, they can be simplified using reduce. 'Reduce ' function is to edit or manipulate the elements of the very higher. Like a refresher on arrow function implies using arrow functions the examples show moving from normal function to the '... 'Avengers ' order to utilize JavaScript 's modern features let me know you! Video, higher-order functions the article is written main use case of a reduce function as their.... Function call to higherOrderFunction ( ) to it 🙏 let us take the same and let me know if would.

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es6 higher order functions