1) Use ng-repeat sparingly
Using ng-repeat in views generally results in poor performance, particularly when there are nested ng-repeat's.
This is super slow!
<div ng-repeat="user in userCollection">
<div ng-repeat="details in user">
{{details}}
</div...
You can call a function in Racket by wrapping it in parentheses with the arguments after it. This looks like (function argument ...).
> (define (f x) x)
> (f 1)
1
> (f "salmon")
"salmon"
> (define (g x y) (string-append x y))
> (g "large" "sal...
Consider the character class [aeiou]. This character class can be used in a regular expression to match a set of similarly spelled words.
b[aeiou]t matches:
bat
bet
bit
bot
but
It does not match:
bout
btt
bt
Character classes on their own match one and only one character at a time...
Two Random class created at the same time will have the same seed value.
Using System.Guid.NewGuid().GetHashCode() can get a different seed even in the same time.
Random rnd1 = new Random();
Random rnd2 = new Random();
Console.WriteLine("First 5 random number in rnd1");
for (int i = 0...
We have a sample Spring boot application which stores user data in MongoDB and we are using Rest services to retrieve data
First there is a domain class i.e. POJO
@Document
public class User{
@Id
private String id;
private String name;
}
A corresponding repository based on ...
An enumeration is a user-defined data type consists of integral constants and each integral constant is given a name. Keyword enum is used to define enumerated data type.
If you use enum instead of int or string/ char*, you increase compile-time checking and avoid errors from passing in invalid con...
// define url
let url = NSURL(string: "https://urlToGet.com")
//create a task to get data from a url
let task = NSURLSession.sharedSession().dataTaskWithURL(url!)
{
/*inside this block, we have access to NSData *data, NSURLResponse *response, and NSError...
This example adds a list of places with image and name by using an ArrayList of custom Place objects as dataset.
Activity layout
The layout of the activity / fragment or where the RecyclerView is used only has to contain the RecyclerView. There is no ScrollView or a specific layout needed.
<?x...
In Python you can compare a single element using two binary operators--one on either side:
if 3.14 < x < 3.142:
print("x is near pi")
In many (most?) programming languages, this would be evaluated in a way contrary to regular math: (3.14 < x) < 3.142, but in Python it ...
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...
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...
The below examples use the new form API introduced in RC3.
pw-change.template.html
<form class="container" [formGroup]="pwChangeForm">
<label for="current">Current Password</label>
<input id="current" formControlName="curr...
using System;
using System.Web;
using System.Web.Mvc;
namespace Example.SDK.Filters
{
[AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = false)]
public sealed class CustomErrorHandlerFilter : HandleErrorAttribute
{
public override void OnExceptio...
There are several ways to format and get a string as a result.
The .NET way is by using String.Format or StringBuilder.AppendFormat:
open System
open System.Text
let hello = String.Format ("Hello {0}", "World")
// return a string with "Hello World"
let builder...
Given a C++ source file main.cpp defining a main() function, an accompanying CMakeLists.txt file (with the following content) will instruct CMake to generate the appropriate build instructions for the current system and default C++ compiler.
main.cpp (C++ Hello World Example)
#include <iostream...
