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Difference between & and && in Java? [duplicate]
...
'&' performs both tests, while '&&' only performs the 2nd test if the first is also true. This is known as shortcircuiting and may be considered as an optimization. This is especially useful in guarding against nullness(NullPointerExce...
&& (AND) and || (OR) in IF statements
...ill not be evaluated. And this is very useful. For example, if you need to test whether a String is not null or empty, you can write:
if (str != null && !str.isEmpty()) {
doSomethingWith(str.charAt(0));
}
or, the other way around
if (str == null || str.isEmpty()) {
complainAboutUnusa...
How to validate date with format “mm/dd/yyyy” in JavaScript?
...ut string is a valid date formatted as "mm/dd/yyyy"
function isValidDate(dateString)
{
// First check for the pattern
if(!/^\d{1,2}\/\d{1,2}\/\d{4}$/.test(dateString))
return false;
// Parse the date parts to integers
var parts = dateString.split("/");
var day = parseInt...
Xcode without Storyboard and ARC
...te a project with an Empty application and Add any viewcontroller (i added TestViewController here)
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions: (NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
...
Share cookie between subdomain and domain
...omain.com to share cookies.
See also:
www vs no-www and cookies
cookies test script to try it out
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how to POST/Submit an Input Checkbox that is disabled?
...gs:
<input type="checkbox" checked="checked" disabled="disabled" name="Tests" value="4">SOME TEXT</input>
<input type="hidden" id="Tests" name="Tests" value="4" />
Also, just to let ya'll know readonly="readonly", readonly="true", readonly="", or just READONLY will NOT solve th...
Is it correct to use DIV inside FORM?
...p-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Test</title>
</head>
<body>
<form id="test" action="test.php">
<div>
Test: <input name="blah" value="test" type="text">
</div>
</form>
</body>
</html>
...
Razor view engine, how to enter preprocessor(#if debug)
...e sense than conditional compilation for views and comes in handy for some testing scenarios. (See Tony Wall's comment below.)
Side note: NullReferenceException for HttpContext.Current
Alex Angas mentioned that they get a NullReferenceException with this solution, and a few people have upvoted i...
How to import load a .sql or .csv file into SQLite?
...mething else going on when you tried one method or the other. Under stable testing conditions I guarantee there will be no speed difference.
– IcarusNM
Feb 17 '17 at 18:40
add...
Build project into a JAR automatically in Eclipse
... in target folder; it should also build a JAR automatically and copy the latest JAR at some or a specific location.
7 Answe...