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Darken #demo { @refcolor: #f0b9b8; background: @refcolor; border: 1px solid darken(@refcolor, 25%); } The above code makes use of the darken() function to set the border color as a shade that is 25% darker than the reference color (which is also the background color). Less compiler ca...

internal func Init<Type>(value : Type, block: @noescape (object: Type) -> Void) -> Type { block(object: value) return value } Usage: Init(UILabel(frame: CGRect.zero)) { $0.backgroundColor = UIColor.blackColor() }

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When deriving Serialize and Deserialize implementations for structs with generic type parameters, most of the time Serde is able to infer the correct trait bounds without help from the programmer. It uses several heuristics to guess the right bound, but most importantly it puts a bound of T: Seriali...

Suppose that you had started an interactive rebase: git rebase --interactive HEAD~20 and by mistake, you squashed or dropped some commits that you didn't want to lose, but then completed the rebase. To recover, do git reflog, and you might see some output like this: aaaaaaa HEAD@{0} rebase -i (...

For those that are using UI to branch click Right Mouse on repository then Tortoise Git -> Create Branch... New window will open -> Give branch a name -> Tick the box Switch to new branch (Chances are you want to start working with it after branching). -> Click OK and you should be do...

If we have a Model as following, from django.db import models from django.contrib.auth.models import User class UserModuleProfile(models.Model): user = models.OneToOneField(User) expired = models.DateTimeField() admin = models.BooleanField(default=False) employee_id = models...

The & operator is the parent selector. When used in or as a selector, it is replaced with the full parent selectors (entire sequence of selectors right upto to the topmost level of a nested block) in the final CSS output. It is useful when creating nested rules that require using the parent sel...

Less allows the usage of the parent selector (&) anywhere in a complex selector and thus allows changing styles when the current element is within another element which gives it a different context: For example, in the below code the parent selector is placed at the end and thus it actually be...

Import the class, which contains the method to be tested. Perform the operation with dummy data. Now compare the result of operation with expected result. - (void)testReverseString{ NSString *originalString = @"hi_my_name_is_siddharth"; NSString *reversedString = [self.someObject ...

- (void)testDoSomethingThatTakesSomeTime{ XCTestExpectation *completionExpectation = [self expectationWithDescription:@"Long method"]; [self.someObject doSomethingThatTakesSomeTimesWithCompletionBlock:^(NSString *result) { XCTAssertEqualObjects(@"result", result, @"Re...

1. For Synchronous methods : - (void)testPerformanceReverseString { NSString *originalString = @"hi_my_name_is_siddharth"; [self measureBlock:^{ [self.someObject reverseString:originalString]; }]; } 2. For Asynchronous methods : - (void)testPerformanceOfAsynch...

This example demonstrates how you can respond to a button click by performing some work on a worker thread and then update the user interface to indicate completion void MyButton_OnClick(object sender, EventArgs args) { Task.Run(() => // Schedule work using the thread pool { ...

C++11 Motivational example When you have a variadic template pack in the template parameters list, like in the following code snippet: template<typename ...Args> void func(Args &&...args) { //... }; The standard library (prior to C++17) offers no direct way to write enable_if...

psycopg2 is the most popular PostgreSQL database adapter that is both lightweight and efficient. It is the current implementation of the PostgreSQL adapter. Its main features are the complete implementation of the Python DB API 2.0 specification and the thread safety (several threads can share t...

<Image x:Name="MyImage" /> // Show image from web MyImage.Source = new BitmapImage(new Uri("http://your-image-url.com")) // Show image from solution MyImage.Source = new Uri("ms-appx:///your-image-in-solution", UriKind.Absolute) // Show image from file ...

<TextBlock x:Name="MyControl" Text="Hello, world!" /> var rtb = new RenderTargetBitmap(); await rtb.RenderAsync(MyControl); // Render control to RenderTargetBitmap // Get pixels from RTB IBuffer pixelBuffer = await rtb.GetPixelsAsync(); byte[] pixels = ...

IRandomAccessStreamReference bitmap = GetBitmap(); IRandomAccessStreamWithContentType stream = await bitmap.OpenReadAsync(); BitmapDecoder decoder = await BitmapDecoder.CreateAsync(stream); var pixels = await decoder.GetPixelDataAsync(); var outStream = new InMemoryRandomAccessStream(); // Cr...

public static async Task<IRandomAccessStream> ConvertWriteableBitmapToRandomAccessStream(WriteableBitmap writeableBitmap) { var stream = new InMemoryRandomAccessStream(); BitmapEncoder encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.JpegEncoderId, stream); Stream pixe...

nrs = [1, 2, 3, 4, 5, 6, 7, 8, 9] lets = ['a', 'b', 'c', 'd', 'e', 'f'] println GroovyCollections.transpose([nrs, lets]) .collect {le -> [(le[0]):le[1]]}.collectEntries { it } or println [nrs,lets].transpose().collectEntries{[it[0],it[1]]} // [1:a, 2:b, 3:c, 4:d, 5:e, 6:f...