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Check if an array is empty or exists
...ray && !array.length) // array exists, but empty check; if(str) // string not null and not empty. The only gotcha is don't use on numbers if zero is a valid number.
– Rick Love
Feb 27 '17 at 3:47
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Why is there no Constant feature in Java?
...ect. The Java platform libraries contain many immutable classes, including String, the boxed primitive classes, and BigInte- ger and BigDecimal. There are many good reasons for this: Immutable classes are easier to design, implement, and use than mutable classes. They are less prone to error and are...
What's wrong with using == to compare floats in Java?
...m, that's not a floating point value. That's a floating point literal---a string that compiler converts into a floating point value by doing a calculation.
– Solomon Slow
Nov 6 '15 at 18:24
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async/await - when to return a Task vs void?
...class Program {
static bool isFinished = false;
static void Main(string[] args) {
// Kick off the background operation and don't care about when it completes
BackgroundWork();
Console.WriteLine("Press enter when you're ready to stop the background operation.");
...
SQL how to make null values come last when sorting ascending
...s 0, and nulls become 1, which sorts nulls last.
You can also do this for strings:
SELECT *
FROM Employees
ORDER BY ISNULL(LEFT(LastName,0),'a'), LastName
Because 'a' > ''.
This even works with dates by coercing to a nullable int and using the method for ints above:
SELECT *
FROM Employe...
Get current language with angular-translate
...edLanguage() that return what you want. The return of this function is the string of the language, like 'en'.
Here i wrote you an example:
angular.module('traslateApp').controller('myController', ['$scope', '$translate', function($scope,$translate){
$scope.changeLanguage = function (langKey) {
...
Use Expect in a Bash script to provide a password to an SSH command
... starting with a dash (-) will fail otherwise.
The above won't interpret a string starting with a dash as an option to the send command.
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Page scroll when soft keyboard popped up
... android:name="com.example.patronusgps.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</ac...
Count work days between two dates
... the accepted answer as a function using DATEPART, so I don't have to do a string comparison on the line with
DATENAME(dw, @StartDate) = 'Sunday'
Anyway, here's my business datediff function
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE FUNCTION BDATEDIFF
(
@startdate as DATETIME...
How to mock void methods with Mockito
...thodName();
Presuming that you are looking at mocking the setter setState(String s) in the class World below is the code uses doAnswer method to mock the setState.
World mockWorld = mock(World.class);
doAnswer(new Answer<Void>() {
public Void answer(InvocationOnMock invocation) {
O...