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What’s the difference between “Array()” and “[]” while declaring a JavaScript array?
...hese are the same
b = new Array(), // a and b are arrays with length 0
c = ['foo', 'bar'], // these are the same
d = new Array('foo', 'bar'), // c and d are arrays with 2 strings
// these are different:
e = [3] // e.length == 1, e[0] == 3
f = new Ar...
JavaScript checking for null vs. undefined and difference between == and ===
...
+50
How do I check a variable if it's null or undefined...
Is the variable null:
if (a === null)
// or
if (a == null) // but see not...
Elastic search, multiple indexes vs one index and types for different data sets?
...
190
There are different implications to both approaches.
Assuming you are using Elasticsearch's de...
Lock, mutex, semaphore… what's the difference?
...|
edited Jan 29 '19 at 7:40
answered Feb 25 '10 at 9:21
Pet...
Convert between UIImage and Base64 string
...ta format
let imageData:NSData = NSData.init(contentsOfURL: url)!
Swift 2.0 > Encoding
let strBase64:String = imageData.base64EncodedStringWithOptions(.Encoding64CharacterLineLength)
Swift 2.0 > Decoding
let dataDecoded:NSData = NSData(base64EncodedString: strBase64, options: NSDataBase64Dec...
Why does Unicorn need to be deployed together with Nginx?
...|
edited Nov 16 '15 at 22:05
Pete - MSFT
3,8991818 silver badges3737 bronze badges
answered Jan 5 '12 at...
How to set date format in HTML date input tag?
...ify that as a short date, the first day of August this year should be 1/8-2016, but even Chrome and Opera show 01/08/2016. Other browsers, like Safari and Firefox (at least on OS X) ignore OS settings entirely and always show 2016-08-16 no matter what. On a site where users can set their own date pr...
How to get a variable value if variable name is stored as string?
...
answered Dec 17 '09 at 12:09
Phil RossPhil Ross
22.5k99 gold badges6666 silver badges7474 bronze badges
...
Behaviour for significant change location API when terminated/suspended?
...
80
Since I asked this question, I have done a fair bit of testing (mostly on the train between home...
What is the worst gotcha in C# or .NET? [closed]
...
304
private int myVar;
public int MyVar
{
get { return MyVar; }
}
Blammo. Your app crashes w...