Picasso supports both download and error placeholders as optional features. Its also provides callbacks for handling the download result.
Picasso.with(context)
.load("YOUR IMAGE URL HERE")
.placeholder(Your Drawable Resource) //this is optional the image to display while the url i...
people := map[string]int{
"john": 30,
"jane": 29,
"mark": 11,
}
for _, value := range people {
fmt.Println("Age:", value)
}
Note that when iterating over a map with a range loop, the iteration order is not specified and is not guaranteed to...
Installing Visual Studio
If you do not have Visual Studio installed, you can download the free Visual Studio Community Edition here. If you already have it installed, you can proceed to the next step.
Creating an ASP.NET Core MVC Application.
Open Visual Studio.
Select File > New Project.
...
DROP INDEX ix_cars_employee_id ON Cars;
We can use command DROP to delete our index. In this example we will DROP the index called ix_cars_employee_id on the table Cars.
This deletes the index entirely, and if the index is clustered, will remove any clustering. It cannot be rebuilt without rec...
Factories can be used in conjunction with Inversion of Control (IoC) libraries too.
The typical use case for such a factory is when we want to create an object based on parameters that are not known until run-time (such as the current User).
In these cases it can be sometimes be difficult (if no...
Enumerating dictionaries allows you to run a block of code on each dictionary key-value pair using the method enumerateKeysAndObjectsUsingBlock:(void (^)(id key, id obj, BOOL *stop))block
Example:
NSDictionary stockSymbolsDictionary = @{
@"AAPL":...
Given a file file.txt with the following content:
line 1
line 2
line 3
You can delete a line from file content with the d command.
The pattern to match is surrounded with default / delimiter and the d command follows the pattern:
sed '/line 2/d' file.txt
The above command will output:
l...
Singletons are used to ensure that only one instance of an object is being created. The singleton allows only a single instance of itself to be created which means it controls its creation.
The singleton is one of the Gang of Four design patterns and is a creational pattern.
Thread-Safe Singleton ...
Fourier Transform is probably the first lesson in Digital Signal Processing, it's application is everywhere and it is a powerful tool when it comes to analyze data (in all sectors) or signals. Matlab has a set of powerful toolboxes for Fourier Transform. In this example, we will use Fourier Transfor...
If you set opacity on an element it will affect all its child elements. To set an opacity just on the background of an element you will have to use RGBA colors. Following example will have a black background with 0.6 opacity.
/* Fallback for web browsers that don't support RGBa */
background-color...
If your project depends on the external libraries, you should first install them with opam.
Assuming your dependencies are foo and bar and the main entry point of your project is foobar.ml you can then build a bytecode executable with
ocamlbuild -use-ocamlfind -pkgs 'foo,bar' foobar.byte
Warnin...
If your project has no external dependency and has foo.ml as its main entry point, you can compile a bytecode version with
ocamlbuild foo.byte
To get a native executable, run
ocamlbuild foo.native
Fortran 2003 introduced language features which can guarantee interoperability between C and Fortran (and to more languages by using C as an intermediary). These features are mostly accessed through the intrinsic module iso_c_binding:
use, intrinsic :: iso_c_binding
The intrinsic keyword here en...
In attempt to send a response asynchronously from chrome.runtime.onMessage callback we might try this wrong code:
chrome.runtime.onMessage.addListener(function(request, sender, sendResponse) {
$.ajax({
url: 'https://www.google.com',
method: 'GET',
success: functio...
Homebrew
You can install Node.js using the Homebrew package manager.
Start by updating brew:
brew update
You may need to change permissions or paths. It's best to run this before proceeding:
brew doctor
Next you can install Node.js by running:
brew install node
Once Node.js is installe...
Detailed instructions on getting laravel set up or installed.
composer is required for installing laravel easily.
There are 3 methods of installing laravel in your system:
Via Laravel Installer
Download the Laravel installer using composer
composer global require "laravel/installer&quo...
