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Map takes a function and a collection of items. It makes a new, empty collection, runs the function on each item in the original collection and inserts each return value into the new collection. It returns the new collection. This is a simple map that takes a list of names and returns a list of the...

Reduce takes a function and a collection of items. It returns a value that is created by combining the items. This is a simple reduce. It returns the sum of all the items in the collection. total = reduce(lambda a, x: a + x, [0, 1, 2, 3, 4]) print(total) =>10

Filter takes a function and a collection. It returns a collection of every item for which the function returned True. arr=[1,2,3,4,5,6] [i for i in filter(lambda x:x>4,arr)] # outputs[5,6]

Detailed instructions on getting identityserver3 set up or installed.

Create a new bot in Azure following this documentation Login into Azure and from Intelligence + Analytics category, select Bot Service and provide required information. Enter the required details for the bot, they are identical to the required details of an App Service,for example App Name, Subs...

let label = UILabel.init(frame: CGRect(x: 0, y:0, width: 100, height: 40)) label.backgroundColor = .lightGray let attributedString = NSMutableAttributedString.init(string: "Apply UnderLining") attributedString.addAttribute(NSUnderlineStyleAttributeName, value: 1, range: NSRange.init...

Simply add an attribute to the controller action [Route("product/{productId}/customer")] public IQueryable<Product> GetProductsByCustomer(int productId) { //action code goes here } this will be queried as /product/1/customer and productId=1 will be sent to the controll...

//Header File <CallKit/CXCallObserver.h> CXCallObserver *callObserver = [[CXCallObserver alloc] init]; // If queue is nil, then callbacks will be performed on main queue [callObserver setDelegate:self queue:nil]; // Don't forget to store reference to callObserver, to prevent it ...

Unit testing in ionic is the same as in any angular app. We'll be using a few frameworks to do this. Karma - a framework for running tests Jasmine - a framework for writing tests PhantomJS - an application that runs javascript without a browser First of all lets install everything, so make sure...

Using find() const inventory = [ {name: 'apples', quantity: 2}, {name: 'bananas', quantity: 0}, {name: 'cherries', quantity: 5} ]; function findCherries(fruit) { return fruit.name === 'cherries'; } inventory.find(findCherries); // { name: 'cherries', quantity: 5 } /*...

Everything in Python is an object. Each object has some special internal methods which it uses to interact with other objects. Generally, these methods follow the __action__ naming convention. Collectively, this is termed as the Python Data Model. You can overload any of these methods. This is comm...

HTMLUnitDriver HTMLUnitDriver is the most lightweight implementation of headless(GUI-less) browser for Webdriver based on HtmlUnit. It models HTML documents and provides an API that allows you to invoke pages, fill out forms, click links, etc. just like you do in your normal browser. It supports J...

A way to create a list is to place elements in two square brackets, separated by semicolons. The elements must have the same type. Example: > let integers = [1; 2; 45; -1];; val integers : int list = [1; 2; 45; -1] > let floats = [10.7; 2.0; 45.3; -1.05];; val floats : float list = [1...

Given that the data directory of the server is empty: The server is initialized. SSL certificate and key files are generated in the data directory. The validate_password plugin is installed and enabled. The superuser account 'root'@'localhost' is created. The password for the superuser is set ...

To reveal the default "root" password: shell> sudo grep 'temporary password' /var/log/mysqld.log Change the root password as soon as possible by logging in with the generated temporary password and set a custom password for the superuser account: shell> mysql -uroot -p mysql...

Processing Field collection items with Rules is fun, really! Have a look at this Rule (in Rules export format): { "rules_calculate_sum_of_prices_in_all_field_collection_items" : { "LABEL" : "Calculate sum of prices in all field collection items", "PLUGIN...

While handling not in sub-query with null in the sub-query we need to eliminate NULLS to get your expected results create table #outertable (i int) create table #innertable (i int) insert into #outertable (i) values (1), (2),(3),(4), (5) insert into #innertable (i) values (2), (3), (null) s...

Keychain allows to save items with special SecAccessControl attribute which will allow to get item from Keychain only after user will be authenticated with Touch ID (or passcode if such fallback is allowed). App is only notified whether the authentication was successful or not, whole UI is managed b...

Detailed instructions on getting omnet++ set up or installed.