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To print even-length words we calculate the length of each word using the count property. Then we check if the length of the word is even or not. If yes, then we will print the word. Otherwise not. Input Str = “Learn Swift language” Output language Here the given string has three words: “Learn", “Swift”, and “language”. But the output is “language” because its length is even that is 8. Algorithm Step 1 − Create a variable to store a string. Step 2 − Split the string into words using the split() function. Step 3 − Now ... Read More
Ever imagined how essential maps and locations are in our life? Just consider finding a restaurant or looking at a particular store. You open up your phone or tablet, and voila! A street map shows you routes and points of interest along those routes. Are you on holiday in a tourist destination? A map will show you locations, routes, roads, points of interest, and crucial buildings such as restaurants and medical shops. However, these are more challenging to access if you know how to get to your current location. Moreover, in case of an emergency or a critical situation, you ... Read More
In Swift, a dictionary is used to create an unordered collection in which the data is stored in the form of key-value pairs. So to print a dictionary we will use the following methods − Using for-in loop Using description property Method 1: Using for-in Loop In Swift, we can print all the key-value pairs of the given dictionary with the help of a for-in loop. The for-in loop iterates through each pair of the dictionary and displays them on the output screen. Syntax for(key, value) in dict { print(“\(key) = \(value)”) } Here, ... Read More
A Swift dictionary is an unordered collection in which data is stored as key-value pairs. So to pass a dictionary as a function argument simply create a function with an argument of dictionary type and a dictionary, then pass it to the function at the time of function calling. Syntax func functionName(dict:[DataType:DataType]){ // Body } So this is how you can define a function which takes a dictionary as its argument. functionName(dict:DictionayName) This is how you can pass a dictionary as a function argument. Dict.last Here Dict is the name of the dictionary from ... Read More
In Swift, we can merge two or more integer arrays without using the library function. So Swift provides an addition assignment(+=) operator to merge two integer arrays. Using this operator we will merge two arrays and assign the result into a new array. Syntax newArray += array Here, newArray is the resultant array and array represents the array which we want to merge. Algorithm Step 1 − Create a function that takes two arrays as an argument and returns a merged array. Step 2 − Inside the function create an empty array to store the resultant array. Step ... Read More
To merge the content of two dictionaries Swift provides a pre-defined function named merging(_:uniqueKeysWith:). This function creates a new dictionary by merging the elements of two dictionaries. It also uses a combining closure to check the values for duplicate keys. Syntax func merging(otherDict){comClosure} This function takes two parameters and they are − OtherDict − It is a dictionary to merge. comClosure − It is a closure which takes current and new values for the duplicate keys and then returns the desired value for the output dictionary. It is an optional parameter that means if you don’t want ... Read More
In Swift, we can iterate through each character of the string very easily. For the iteration, Swift provides the following methods − Using for-in loop Using forEach() function Using enumerated() function Method 1: Using for-in loop We can use a for-in loop for the iteration. It iterates through each character of the string and then performs the expressions given inside the loop body or can display them on the output screen. Syntax for x in mstr{ // body } Here mstr is the string and x stores the current character from the string in ... Read More
Swift provides a function named insert() to insert a string into another string. The insert(at:) function adds a new character or string in the current string at the specified position. Input String = “Program to learn” New String = “Swift” Output String = Swift Program to learn” Here we insert a new string in the input String at index 1. So we get “Swift Program to learn” in the output. Syntax func insert(newVal, at: idx) Where newVal represents a new string which we want to insert into the given string, and idx is the valid index to ... Read More
A dictionary is a collection of key-value pairs. Which means keys and values are interrelated with each other. So using a value we can easily get single or multiple keys from the given dictionary. Algorithm Step 1 − Create a dictionary with key-value pairs. Step 2 − Then create a function which will return the key from the dictionary using the value. Step 3 − Inside the function we run a for-in loop which iterates over the key-value pairs of the given dictionary. Step 4 − Now check if the current value is equal to the specified value. If ... Read More
Introduction Many times in android applications we can get to see when the user changes the screen orientation of the device from portrait to landscape. In that case we can get to see that some of the views within the application loses its state. For example when a user enters any data in a text file and then changes the screen orientation from portrait to landscape, in that case the data which is already entered gets cleared up. To prevent this we have to store the state of that view. In this article we will take a look on How ... Read More