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clojure.spec/and & clojure.spec/or can be used to create more complex specs, using multiple specs or predicates: (clojure.spec/def ::pos-odd (clojure.spec/and odd? pos?)) (clojure.spec/valid? ::pos-odd 1) ;;=> true (clojure.spec/valid? ::pos-odd -3) ;;=> false or works similarl...

You can spec a record as follows: (clojure.spec/def ::name string?) (clojure.spec/def ::age pos-int?) (clojure.spec/def ::occupation string?) (defrecord Person [name age occupation]) (clojure.spec/def ::person (clojure.spec/keys :req-un [::name ::age ::occupation])) (clojure.spec/valid? ...

You can spec collections in a number of ways. coll-of allows you to spec collections and provide some additional constraints. Here's a simple example: (clojure.spec/valid? (clojure.spec/coll-of int?) [1 2 3]) ;; => true (clojure.spec/valid? (clojure.spec/coll-of int?) '(1 2 3)) ;; => tru...

Sometimes you may only need to simulate an event with two outcomes, maybe with different probabilities, but you may find yourself in a situation that calls for many possible outcomes with different probabilities. Let's imagine you want to simulate an event that has six equally probable outcomes. T...

Consider a production table called questions_mysql and a table iwtQuestions (imported worktable) representing the last batch of imported CSV data from a LOAD DATA INFILE. The worktable is truncated before the import, the data is imported, and that process is not shown here. Update our production da...

This example demonstrates creating a basic application in ExtJS using Sencha Cmd to bootstrap the process - this method will automatically generate some code and a skeleton structure for the project. Open a console window and change the working directory to an appropriate space in which to work. ...

A While loop starts by evaluating a condition. If it is true, the body of the loop is executed. After the body of the loop is executed, the While condition is evaluated again to determine whether to re-execute the body. Dim iteration As Integer = 1 While iteration <= 10 Console.Writeline(ite...

A package.json file, usually present in the project root, contains metadata about your app or module as well as the list of dependencies to install from npm when running npm install. To initialize a package.json type npm init in your command prompt. To create a package.json with default values use...

2.3-2.3.2 An enclosing CoordinatorLayout can be used to achieve Material Design Scrolling Effects when using inner layouts that support Nested Scrolling, such as NestedScrollView or RecyclerView. For this example: app:layout_scrollFlags="scroll|enterAlways" is used in the Toolbar pro...

Any time you instantiate a class that Implements IDisposable, you should call .Dispose1 on that class when you have finished using it. This allows the class to clean up any managed or unmanaged dependencies that it may be using. Not doing this could cause a memory leak. The Using keyword ensures th...

Sometimes, you have to create two Disposable objects in a row. There is an easy way to avoid nesting Using blocks. This code Using File As New FileStream("MyFile", FileMode.Append) Using Writer As New BinaryWriter(File) 'You code here Writer.Writer("Hello&quot...

Place your test classes here: /src/test/<pkg_name>/ Example test class public class ExampleUnitTest { @Test public void addition_isCorrect() throws Exception { int a=4, b=5, c; c = a + b; assertEquals(9, c); // This test passes assertEquals(10, c...

The @Header and @Body annotations can be placed into the method signatures and Retrofit will automatically create them based on your models. public interface MyService { @POST("authentication/user") Call<AuthenticationResponse> authenticateUser(@Body AuthenticationReques...

The background-origin property specifies where the background image is positioned. Note: If the background-attachment property is set to fixed, this property has no effect. Default value: padding-box Possible values: padding-box - The position is relative to the padding box border-box - The p...

Definition and Usage: The background-clip property specifies the painting area of the background. Default value: border-box Values border-box is the default value. This allows the background to extend all the way to the outside edge of the element's border. padding-box clips the background at ...

An annotated method with @Before will be executed before every execution of @Test methods. Analogous an @After annotated method gets executed after every @Test method. This can be used to repeatedly set up a Test setting and clean up after every test. So the tests are independent and preparation cod...

Import in your gradle root file classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8' Import in your gradle app file apt 'com.google.auto.value:auto-value:1.2' apt 'com.ryanharter.auto.value:auto-value-gson:0.3.1' provided 'com.jakewharton.auto.value:auto-value-annotations:1.2-update...

When you need to set a pixel value for something like Paint.setTextSize but still want it be scaled based on the device, you can convert dp and sp values. DisplayMetrics metrics = Resources.getSystem().getDisplayMetrics(); float pixels = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, 12f, m...

One should have in mind that: Angular's data binding relies on JavaScript’s prototypal inheritance, thus it's subject to variable shadowing. A child scope normally prototypically inherits from its parent scope. One exception to this rule is a directive which has an isolated scope as it doesn't p...

USER daemon The USER instruction sets the user name or UID to use when running the image and for any RUN, CMD and ENTRYPOINT instructions that follow it in the Dockerfile.