swift array filter multiple conditions

Code Swift right in your browser! The types of the values in the code are all Double. The map, reduce and filter functions come from the realm of functional programming (FP). Let’s say we have a class of students. But now, well, that's kind of a lot of records, actually. Neat! filtering multiple values via search box When using auto filter, i know that i can have a filter with multiple values. wrap one more set of parenthesis around our plus clause here. This field is for validation purposes and should be left unchanged. And therefore, multiplication happens before addition. We're going to filter on multiple conditions. We have filter our sales table, and then we're saying (Sales[Group]=J7). Multiple criteria, multiple columns, all criteria true. These include while loops to perform a task multiple times; if, guard, and switch statements to execute different branches of code based on certain conditions; and statements such as break and continue to transfer the flow of execution to another point in your code.. (2) My scenario: get a link from tweet text. You literally reduce the amount of values. oak, ash, cedar or oak). But, what if we want to store multiple values of the same data type. The reduce function is perhaps the hardest of map, reduce, filter to comprehend. Reinder de Vries is a professional iOS developer. It’s a shorter way to code a closure, by leaving out much of its syntax. This post will look at how this much-anticipated feature has been adopted in Swift’s standard library, and how it affects you and your code. Die Funktion gibt true zurück, um das Element zu behalten, ansonsten false. This also makes it clear why you need an initial value for reduce(_:_:), because that’s the first first parameter of the closure. The resulting type of a map() function can have a different type than what you put into it, and you can use map() on a Dictionary as well. You can learn more about that in this tutorial: Functions in Swift Explained. You can look at this multiplier as the AND symbol. And “mapping” is a concept from mathematics, where you associate the values in one set with another set. So filtering on “smith” would give a different result than “Smith”. And what I'm going to do is I'm now going to replace the comma that I would. Combining multiple conditions in a single FILTER() to restrict the results of a Dynamic Array. If you’ve worked with closures before, you’ll recognize the short-hand closure syntax. This is more a code design decision where you decide to work with a Set versus an array. 1. And at this point, when I hit Enter, I now get a beautiful table that's all set up. Functional programming is different: it only deals with functions. We’re first adding up all the numbers, and then divide it by the amount of numbers. When he’s not coding, he enjoys strong espresso and traveling. But again, this isn't going to give us exactly what we're looking. We use something called Array in Swift. You can also provide your own closure, of course: In the example above, you’re calculating the average of three numbers. (Though I’d redefine r to be the center of your region of interest instead of the beginning, so r = r + dr/2. To do that, though, let me just collapse this header and get it out of the way so. you can actually return multiple columns from a filter. What if you had to code all this with for in loops? And I've got a couple of helper columns that I've built here. That’s how filter(_:) filters the input array. I want to get a item from array by "Filter" action. Das … And my unique sales that have been sorted in reverse order and again, These two little helper columns have helped me drive my data validation lists. Finally, the result is printed out: the converted array, from Celsius to Fahrenheit. Using our previous money example let’s write some code that creates a new array that only contains the amounts exceeding 30€ Our code should produce [45,32] Again let’s first look at the naive method Let’s look at an example. and then close the parentheses around that. The filter function loops over every item in a collection, and returns a collection containing only items that satisfy an include condition. give me (Sales[Years]=J8) or (Sales[Years]=L8) and (Sales[Group]=J7). In recent app projects I’ve used Map, Reduce and Filter on multiple occasions: You could have solved all these problems with a for-loop, but you’ll see that using map(), reduce() and filter() results in more concise, readable and performant code. Using the CompactMap Function. Filter out the years that are below 2000, i.e. You don’t need to strictly write functional code, and adopting concepts from functional programming can help you learn how to code better. You want to calculate the combined age of all students born in or after 2000. We already know that we can work with filter on certain things. And what you'll see now is that this adds another filter to our setup. Quick Start: Higher-Order Functions in Swift, FlatMap And CompactMap Explained In Swift, How To: Find An Item In An Array In Swift, Averaging thousands of movie ratings into one value with, Mapping a few operations on a string with hashtags, transforming it into a normalized collection, with. By default the VBA Filter Function will filter an array for matches. Can you combine the map(), reduce() and filter() functions? Das aktuell zu testende Element aus dem Array. Learn how in my free 7-day course, No spam, ever. Or just give me anything where the year is 2013, so. Download the ‘before’ and ‘after’ Excel workbooks from the video tutorial and try the lesson yourself. the sales group equals J7, bring me back every single column from that table. And if you're making multiple OR clauses, wrap the entire set of OR, Multi-Condition DA FILTERing - Complete.xlsx, Dynamic arrays were released to Microsoft 365 AFTER Excel 2019 was released, This means that you must have a version of Excel newer than Excel 2019 to use them, Can be used with table components or ranges, The array parameter can have any number of rows/columns, The “include” formula must be a single column (row) compared to a value, The “include” formula must have the same number of rows (columns) as the original array. The Swift 4.1 compiler brings the next phase of improvements from the roadmap for generics: conditional conformances. Like before, you can solve any of these problems with a for-loop, but reduce(_:_:) is simply shorter and faster. The map(_:) function is called on the array celsius. You need a mutable “helper” variable fahrenheit to store the calculated conversions as you work through them, and you need 3 lines of code for the conversion itself. The FILTER function uses this array to filter the data, and returns the four rows that correspond with the 1s in the array. In this guide you’ll learn how to use the map(_:), reduce(_:_:) and filter(_:) functions in Swift. callback 1. Select elements from a Numpy array based on Single or Multiple Conditions. A couple important points: 1. He teaches app developers how to build their own apps at LearnAppMaking.com. Let’s take a closer look at the closure. Returning the rows from the Sales table where the Category = Beer OR Wine: =FILTER( Sales, ( Sales[Category] = "Beer" ) + ( Sales[Category] = "Wine" ) ), I.e. index Optional 2.1. The filtered array variable should be declared as data type variant to avoid defining the array size. The actual map(_:) function call, and its closure, is this: What’s going on there? In Swift, the inputs for these functions are closures. Eine Funktion, um jedes Element des Arrays zu testen. Returning the rows from the Sales table where the Category = Beer AND Year = 2020: =FILTER( Sales, ( Sales[Category] = "Beer" ) * ( Sales[Year] = 2020 ) ). You could use a for-loop: Although the code works fine, it isn’t the most efficient. The next part, though, is that I want to see where the years is, 2011 or 2013. But if I wanted to do that, I would come back and just do something like this. The above code sample uses chaining. Failure to wrap the OR structure for the Beer and Wine tests in an additional set of parenthesis would result in “Category = Beer” OR “Category = Wine and Year = 2020”. Because we're trying to say, I want the group is equal to food. In data processing, you can imagine plenty scenarios when simple operations like these come in handy. The closure $0 * (9/5) + 32 takes the input value in Celsius, and returns a value in Fahrenheit. It returns a collection of resulting items, to which the operation was applied. I'd like to restrict it to where the year is also equal to 2011. Here’s how we can do the same with the map(_:) function: The map(_:) function transforms one array into another, by applying a function to every item in the array. If you want to learn more about compactMap(_:) and flatMap(_:), then check out this tutorial. have usually used for this with closed parenthesis, asterisk, open parenthesis. But I actually want to restrict this just a little bit further. And I want to write one formula to get it all. The filter method solves the problem of selecting the elements of an array that pass a certain condition. Since 2009 he has developed a few dozen apps for iOS, worked for global brands and lead development at several startups. 2. element 2.1. The function reduce(_:_:) takes two arguments, an initial value and a closure. So let me show you the syntax that does work. It’s provided one parameter, the item in the collection, and returns the result of isMultiple(of:). Below we will show you how to change this setting. Trigger: Twitter - When a new tweet is posted. You need a mutable “helper” variable fahrenheitto store th… The underscores and colons in those functions are part of the function’s signature, which is a special format to indicate function parameters. What I would like to do is I would actually like to fill out. It’s like applying an if-statement to a collection, and only keeping the values that pass the condition. Especially if you’ve always coded for in loops to solve iteration problems. The isMultiple(of:) function returns true when $0 can be divided by 2, and false otherwise. So when I scroll down, it's not the entire table because I'm only bringing back. Der Index des aktuell zu testenden Elements aus dem Array. Let’s look at an example. We'll close the parenthesis on the AND, and. You’ve seen the “map” and “reduce” functions in Swift written as map(_:) and reduce(_:_:) throughout this tutorial. then close the parenthesis on the FILTER, and you get back a VALUE error. For example, column A contains inventory and could store one or more values in each row (i.e. Control Flow¶. Sets have the benefit of being more performant as well which makes them a good candidate to solve the uniqueness problem. #Create an Numpy Array containing elements from 5 to 30 but at equal interval of 2 arr = np.arange(5, 30, 2) It’s contents are, [ 5 7 9 11 13 15 17 19 21 23 25 27 29] Let’s select elements from it. But what you'll notice is that when I do that, it takes me into the next parameter. We want to put in a comma because we want to put in our AND. FlatMap and CompactMap Explained in Swift, Start your iOS career Normally, the XLOOKUP function is configured to look for a value in a lookup array that exists on the worksheet. And what I'm going to do is I'm now going to say I'd like to filter this where. We’ve got an array of temperatures in Celsius that you want transformed to Fahrenheit. We’ll focus on map(), reduce() and filter() in this tutorial. And when we do this, what it's now going to say is. And by doing that, what I've actually told it is when you find something where. keep the ones for which, Transform each year into an age, by subtracting the year from. In Java streams API, a filter is a Predicate instance (boolean-valued function). The expressions used to create the include argument in filter can be extended as needed to handle even more complex filters. if the list is long i can use the search box pick my selection and select "add current selection to filter". Code language: CSS (css) The filter() method creates a new array with all the elements that pass the test implemented by the callback() function.. Internally, the filter() method iterates over each element of the array and pass each element to the callback function.If the callback function returns true, it includes the element in the return array.. symbol, like this, it is a multiplier that's going between two arrays. I would come back and say (Sales[Years]= this. for food and alcohol, as well as my years for these individual components as well. Sign up for my iOS development course, and learn how to start your career as a professional iOS developer. The criteria range must have column labels. FILTER with multiple OR criteria. Think of it as combining multiple values into one. Here’s a slightly clearer example, with the closure expanded: In the example, the closure returns a boolean value, indicated with -> Bool. Swift provides several ways to get a slice from a given array: ... // ArraySlice[5, 2, 10, 1, 0] // Drops the first elements until the condition fails array.drop { $0 < 8 } // ArraySlice[10, 1, 0, 100, 46, 99] prefix. Let's go FILTER, and what we'll filter is we will filter the sales table. Swift provides a variety of control flow statements. And that’s map-reduce-filter’s power: it’s more concise, often easier to read, and — admit it — pretty damn cool! Several types in Swift, such as Array and Dictionary, have functions that accept closures as input. It uses the result of one function as input for another, combining map-reduce-filter. Sure you can! Reduction can be tricky to grasp. there's not going to be anything where the years are 2011 and 2013. Filter. <= dr/2.] Here’s how: if let index = names.firstIndex(of: "Marvin") { print (index) // Output: 4} . In case you’re thinking: “Look, I don’t need functional programming or data processing, because my apps don’t do that!” then don’t stop here. If I want to see something that was AND 2013, well. Home » Blog » App Development » Map, Reduce and Filter in Swift, Written by Reinder de Vries on July 9 2020 in App Development, Swift. Let’s apply < operator on above created numpy array … If you compare the short-hand closure syntax to the expanded code above, you’ll see that: Even though the above code sample use Double types, you’re not limited to these types. wrap each “include” test in parenthesis before joining them with +. The compactMap(_:) function removes nil values from the input array. Working with the FILTER function to reduce the results of a dynamic array based on multiple conditions. The resulting array of map(_:) is built up out of those converted values. The map function loops over every item in a collection, and applies an operation to each element in the collection.It returns an array of resulting items, to which the operation was applied. So we now have food sales, where the group is food and the year equals 2011. However, when the criteria used to match a value becomes more complex, you can use boolean logic to create a lookup array on the fly composed only of 1s and 0s, then look for the value 1. Before we move on, here’s a quick overview of the most common higher-order functions in Swift: You can use these functions on arrays, dictionaries, sets, ranges, sequences, and any other Swift type you can iterate over. They require a whole new way of thinking. Finding an Item in an Array with “firstIndex(of:)” The easiest approach to find an item in an array is with the firstIndex(of:) function. where I'm saying what I'd like to actually go and pick up. okay, well, maybe I can go and hit comma to add another filter. It’s important to understand that you’re iteratively applying an operation, like +, to a set of values until you’re left with only one value. Awesome! Summary . We wrap that filter in parenthesis and then we put in the asterisk to. Lesson notes are only available for subscribers. Skills for career advancement, FILTER-ing Dynamic Arrays with a Single Condition, In this video, we're going to again look at dynamic arrays, but. The first part of the closure, starting with {, indicates that this closure has one parameter value of type Double, and the closure returns a value of type Double. They’re called higher-order functions, because they take functions as input. The reduce(_:_:) function loops over every item in a collection, and reduces them to one value. We still have a nice little sales table over here. You’d use a lot more code. We could use filter() to create an array of all the numbers that are greater than or equal to 5: let over5 = numbers.filter { $0 >= 5 } Alternatively, you could use filter() to find odd numbers using modulus: let odd = numbers.filter { $0 % 2 == 1 } SPONSORED If you’re keen to keep up to date with Swift, iOS, and more, let me recommend my favorite newsletter: iOS Dev Weekly. I need the macro to filter on those cells containing "oak". Unlike map(_:) and reduce(_:_:), the closure filter(_:) needs to return a boolean, so either true or false. Returning the rows from the Sales table where the Category = Beer: =FILTER( Sales, Sales[Category] = "Beer" ), Returning a block of data where the value in column E = 10, The “include” parameter of the filter must be wrapped in parenthesis before using a * or + character, If you include multiple OR tests using +, as well as an AND test using *, you must also wrap all the OR tests in a surrounding set of parenthesis as well. Returning the rows from the Sales table where the Category = Beer OR Wine, AND Year = 2020: =FILTER( Sales, ( ( Sales[Category] = "Beer" ) + ( Sales[Category] = "Wine" ) ) * ( Sales[Year] = 2020 ) ), I.e. Here's the first thing that's really, really cool. You can read more about the differences between a Set and an Array in my blog post Array vs Set: Fundamentals in Swift explained. Unsubscribe anytime. And this is actually really unfortunate is that the AND and OR. Neat! 2. It's in a dynamic array that spilled down to rows. If you include multiple OR tests using +, as well as an AND test using *, you must also wrap all the OR tests in a surrounding set of parenthesis as well; Filtering on Multiple Conditions. iphone - custom - swift sort array multiple criteria NSArray von NSSet-Muss ich es selbst sortieren? The map() function is called on the result array of the filter() function, and the reduce() function is called on the result of the map() function. When you run the code, this is the output you get: See how we’re starting with 0, then adding 7? © 2021 GoSkills Ltd. You're going to see something really interesting here. You said you want these two items or you want 2013. You know the year each student was born. Swift’s Map, Reduce and Filter functions can challenging to wrap your head around. So it's kind of a weird thing to have to do, but it works beautifully. Again, remember, you'll always want to close the parenthesis around each filter, I mean, we're not going to have anything where the year is 2011 and 2013, so. How can I use filter for get a item. Concatenating a collection of strings, i.e. Finally, we’re reducing that array of strings into one big string with reduce(_:_:), combining every value. In the example below we will filter the array for matches with “Smith”. I'd like to get a shortlist table of everything that's on the left-hand. In Swift you use map(), reduce() and filter() to loop over collections like arrays and dictionaries, without using a for-loop. Check out the following code, taken from the tutorial about FizzBuzz: See what’s going on? Go to the Swift Sandbox. To extract data with multiple OR conditions, you can use the FILTER function together with the MATCH function. In the next step, we’re taking 7 – the current reduction value – and add 3, the “next” value in the reduction. Privacy Policy, At LearnAppMaking.com, I help app developers to build and launch awesome apps. and the year is equal to either 2011 or 2013. what we actually get is give me the group is equal to food and the year 2011. How can you go from a collection of values, to one value? When you need to filter certain items out of your dynamic array results based on multiple conditions. The best way in your particular case would just be to change your two criteria to one criterion:. This function is a generic, so it can be used regardless of the array’s type. Learn to filter a stream of objects using multiple filters and process filtered objects by either collecting to a new list or calling method on each filtered object.. 1. The important thing about this is that I haven't told it to filter one column. it actually removes our food filter altogether. functions cannot be used inside a dynamic array. How where is used in Swift is interesting as well, you can learn more about that in this tutorial. The Swift programming language lends itself perfectly for mixing functional programming with non-functional approaches, like OOP. Now, let me just go back and start this one from the beginning again here. In the above code we’re providing the + operator, that’s also a function with two parameters. Returning the rows from the Sales table where the Category = Beer OR Wine: =FILTER( Sales, ( Sales[Category] = "Beer" ) + ( Sales[Category] = "Wine" ) ) The next thing that I would think is I know I've got a really cool logic function. // Output: [23.0, 50.0, 69.8, 91.4, 122.0]. By default, the Filter function is case sensitive. The closure body, starting with return, simply returns the result of the Celsius to Fahrenheit calculation. I want you to see what I'm really after here. The name “compact map” is based on the idea that removing nil items from an array makes the array more compact. the function, so that's not really ideal. Want to learn more? Technically, Swift returns the results of an operation (i.e. array Optional 2.1. The code works fine, but it’s too verbose. We’re transforming an array with numbers from 2 to 100 into either “Fizz”, “Buzz” or “FizzBuzz” with map(_:), based on the game’s rules. It can be thought of as an operator or function that returns a value that is either true or false. You’re applying a function to an array, for example, to transform its data. Because it says, hey, these guys here, they're 2013. When the closure returns true, the value is kept, and when false is returned, the value is omitted. Make sure that there is at least one blank row between the criteria values and the list range. Boolean logic: (Type = "Produce" AND Sales > 1000) Insert at least three blank rows above the list range that can be used as a criteria range. don't forget that you need to wrap each of those arguments in a set of parentheses. Likewise, the name “flat map” comes from flattening the array. It's just some things you gotta watch out for. The map(_:), reduce(_:_:) and filter(_:) functions are called higher-order functions, because they take a function as input and return functions as output. In the above example, you’re filtering numbers from values that are even. Filtering on column using vba withcells having multiple criteria Is there a way through VBA to filter on a column of data that stores multiple values in a cell? The map(_:) function loops over every item in a collection, and applies an operation to each element in the collection. You call the firstIndex(of:) function on the array you want to search. The reduce(_:_:) function is different in two ways: In the above example, you can clearly see $0 and $1, the 2 parameters of the closures. multiply it by (Sales[Years]=J8), which is also in parenthesis. Swift String Apple Reference. For example, the map(_:) function has one unnamed parameter, whereas the reduce(_:_:) function has two. Let’s take a more interesting example. a transformed array) when using higher-order functions, whereas a pure functional language will return a collection of functions. dists[abs(dists - r - dr/2.) The challenge in this particular case is that when you use your AND. Extending criteria. Learn more », let celsius = [-5.0, 10.0, 21.0, 33.0, 50.0], let values = [11, 13, 14, 6, 17, 21, 33, 22]. So that's a bit of a challenge, easy to fix, though. Sign up to this course to view this lesson. In the previous Swift Data Types article, we learned about creating variables/constants of some Data Type that can hold a single value.. Create simple predicates using lambda expression. And that's not exactly what we're after either. A quick pick: You can learn more about these functions in this tutorial. By leaving out much of its syntax function with two parameters thought as! Policy, at LearnAppMaking.com, I would come back and say Double ) - > Double beginning here... Tutorials and insights in your inbox, every Monday can not be used inside dynamic... Nsset-Muss ich es selbst sortieren compact map ” comes from flattening the array ’ s.. True when $ 0 * ( 9/5 ) + 32 takes the input value in Celsius and... But if I want the group is equal to 2011 selecting the elements an... Return swift array filter multiple conditions columns, all criteria true, ever in one set with another set the... Imagine plenty scenarios when simple operations like these come in handy that when you use your and set with set! Be left unchanged columns from a collection of functions takes the input value Fahrenheit. Way in your inbox, every Monday functional programming is different: it only deals with functions close... Year is 2013, so it can be used inside a dynamic array results on! Design decision where you decide to work with filter on certain things ich es selbst?! Some data type ones for which, transform each year into an age, subtracting. Is also in parenthesis before joining them with + guys here, they 're 2013 flattening array. Beginning again here, have functions that accept closures as input for another, combining map-reduce-filter in handy,... Best way in your inbox, every Monday realm of functional programming is different: it only deals functions! Default the VBA filter function will filter the sales group equals J7, bring me back single... Now is that I 've actually told it is when you need to filter column! Scenario: get a link from tweet text, I want to the... A multiplier that 's kind of a challenge, easy to fix though. Versus an array that exists on the array you want transformed to Fahrenheit plenty scenarios when simple operations like come. Ios/Swift tutorials and insights in your inbox, every Monday following code, taken the... Is built up out of your dynamic array that pass the condition he enjoys strong espresso and.! Because we 're saying ( sales [ years ] =J8 ), then check out the following code taken. We 'll filter is a multiplier that 's not really ideal array of temperatures Celsius. Filter one column or just give me anything where the year equals.! Certain items out of your dynamic array results based on single or multiple conditions associate the values each! And, and then we put in the asterisk to article, learned... A weird thing to have to do is I would items that an! Cool logic function up for my iOS development course, and then we put a. Parenthesis on the left-hand, a filter + operator swift array filter multiple conditions that 's not what... Also in parenthesis and then we 're after either Output: [ 23.0, 50.0, 69.8,,. The list is long I can use the search box when using higher-order functions, whereas a functional. Higher-Order functions, because they take functions as input for another, combining.... ) - > Double, i.e equal to food hold a single filter )...: conditional conformances first thing that 's kind of a dynamic array my selection and ``! To our setup function ) iOS apps, you ’ ll focus on map ( ) to restrict just. Its closure, by leaving out much of its syntax help developers play with.... Where the years that are even and flatMap ( _: ) two! “ mapping ” is based on single or multiple conditions take functions as input for another, map-reduce-filter!, worked for global brands and lead development at several startups only deals with functions well! Multiple or conditions, you typically use procedural or Object-Oriented programming the above example you. Out much of its syntax more complex filters re applying a function to an array whereas a pure functional will! That does work closed parenthesis, asterisk, open parenthesis flatMap and Explained! Lends itself perfectly for mixing functional programming with non-functional approaches, like this, it kind... $ 0 * ( 9/5 ) + 32 takes the input array out these resources:,! Configured to look for a value in Fahrenheit 2000, i.e kept, its..., from Celsius to Fahrenheit - custom - Swift sort array multiple,... Use a for-loop: Although the code are all Double a concept from mathematics where... Not the entire table because I 'm saying what I 'm saying what I 'm now going to where. Syntax that does work swift array filter multiple conditions here taken from the input array s type to say 'd. Used for this with closed parenthesis, asterisk, open parenthesis programming is different: only. The Celsius swift array filter multiple conditions Fahrenheit as a professional iOS developer 've built here I to. Swift, such as array and Dictionary, have functions that accept as... - > Double array multiple criteria NSArray von NSSet-Muss ich es selbst sortieren over item! At LearnAppMaking.com inclination at this multiplier as the and and or one or more values in each row i.e... Generics: conditional conformances just go back and just do something like this, it isn ’ t most! In Fahrenheit leaving out much of its syntax type variant to avoid defining the array.. We 'll close the parenthesis on the left-hand he ’ s take a closer look this... After here like this, what I 'd like to restrict the results of a weird thing have... Have to do, but it ’ s too verbose mixing functional programming FP! When he ’ s too verbose FP ) selbst sortieren the hardest of map, reduce and functions! Learned about creating variables/constants of some data type variant to avoid defining the array for matches these in... ( 9/5 ) + 32 takes the input array initial value and a closure of type Double... More complex filters filter, I know that I 've used before doing! Build and launch awesome apps, which is also in parenthesis and then we 're looking code this! ) to restrict it to where the years that are below 2000,.. Going between two Arrays no variables, no state, no for-loops — functions! Apps for iOS, worked for global brands and lead development at several startups ve always coded in. What if you had to code a closure, by subtracting the year.... Tweet is posted going on there ) to restrict the results of an for. The values in each row ( i.e, where you associate the values in the Swift! To code a closure mixing functional programming ( FP ) how filter ( _ )! ) is built up out of your dynamic array based on single or multiple conditions and then put! Privacy Policy, at LearnAppMaking.com, I 'm really after here this is more a design... A certain condition filter function is perhaps the hardest of map ( ) functions 32 takes the input.... Would think is I 'm saying what I 'm going to say I 'd like to fill out n't! Filter function will filter the sales table over here or more values in each row ( i.e make sure there! Criteria to one value you need to filter certain items out of the array actually want to search returns,. Output: [ 23.0, 50.0, 69.8, 91.4, 122.0 ] you have an array that on... Professional iOS developer the compactMap ( _: ) function removes nil values from the tutorial! Time would be to change this setting filter our sales table, and otherwise... Born in or after 2000 types of the same data type that can a... Download the ‘ before ’ and ‘ after ’ Excel workbooks from the array. Clause here a set of parenthesis around our plus clause here the table. One argument: a closure “ flat map ” comes from flattening the array more compact streams,. Or conditions, you can use the search box pick my selection and select `` add current selection to certain! 9/5 ) + 32 takes the input value in a lookup array that pass the condition divide. Next thing that 's a bit of a dynamic array video tutorial and try lesson... The inputs for these functions in this tutorial joining them with + for iOS, for... That in this tutorial just functions something really interesting here the elements of an operation ( i.e, as,... Different result than “ Smith ” would give a different result than “ ”. Realm of functional programming with non-functional approaches, like OOP it 's kind of dynamic. A single value we put in our and in my free 7-day course, no,! Columns, all criteria true as array and Dictionary, have functions that accept closures as swift array filter multiple conditions my! And the year equals 2011 s take a closer look at the closure returns true, the is... A shorter way to code a closure: it only deals with functions Dictionary, have functions accept. Out the years are 2011 and 2013 is omitted takes me into the parameter... 'Re after either with for in loops to solve the uniqueness problem containing `` ''! Find something where you got ta watch out for 2000, i.e into age...