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How to define custom exception class in Java, the easiest way?
...'t "inherit" non-default constructors, you need to define the one taking a String in your class. Typically you use super(message) in your constructor to invoke your parent constructor. For example, like this:
public class MyException extends Exception {
public MyException(String message) {
...
Generate list of all possible permutations of a string
How would I go about generating a list of all possible permutations of a string between x and y characters in length, containing a variable list of characters.
...
Pretty-Print JSON in Java
...ate();
JsonParser jp = new JsonParser();
JsonElement je = jp.parse(uglyJSONString);
String prettyJsonString = gson.toJson(je);
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Android emulator and virtualbox cannot run at same time
...version of Intel Emulator Accelerator HAXM installed (v6.1.1) .
Go to the extras directory of the Android SDK location displayed in the preferences. On MacOS you can do this:
open ~/Library/Android/sdk/extras
Install the HAXM packing by opening IntelHAXM_6.1.1.dmg, then opening IntelHAXM_6.1.1.mpk...
Can I use a collection initializer for Dictionary entries?
...
var names = new Dictionary<int, string> {
{ 1, "Adam" },
{ 2, "Bart" },
{ 3, "Charlie" }
};
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What is ViewModel in MVC?
...c class Employee : IEntity
{
public int Id { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public DateTime DateCreated { get; set; }
}
View models differ from domain models in that view models only contain the data (represented by pro...
How can I pretty-print JSON using Go?
...o turn into JSON. The question also mentions pretty-printing just any JSON string, and that's what I was trying to do. I just wanted to pretty-log some JSON from a POST request (specifically a CSP violation report).
To use MarshalIndent, you would have to Unmarshal that into an object. If you need...
How can two strings be concatenated?
...osters pointed out, paste can do two things:
concatenate values into one "string", e.g.
> paste("Hello", "world", sep=" ")
[1] "Hello world"
where the argument sep specifies the character(s) to be used between the arguments to concatenate,
or collapse character vectors
> x <- c("Hello"...
Escape Character in SQL Server
...used the preferred approach I recommended for building up a SQL query in a string variable - to use parameterized SQL. Either way, both are answers to the question
– AdaTheDev
Feb 5 '18 at 14:48
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Advantages to Using Private Static Methods
...c class Library
{
private static Book findBook(List<Book> books, string title)
{
// code goes here
}
}
If an instance of library's state ever gets screwed up, and I'm trying to figure out why, I can rule out findBook as the culprit, just from its signature.
I try to commu...