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JOIN queries vs multiple queries
...
100
For inner joins, a single query makes sense, since you only get matching rows.
For left joins,...
When should one use RxJava Observable and when simple Callback on Android?
...For example, the caller wants to get a photo that is cropped to dimensions 100x100. The api may return any size photo, so you can map the getUserPhoto observable to another ResizedPhotoObservable - the caller only gets notified when the resizing is done. If you don't need to use it, don't force it.
...
What is the difference between Pan and Swipe in iOS?
...raggable view
let circle = UIView(frame: CGRect(x: 0.0, y: 0.0, width: 100.0, height: 100.0))
circle.center = self.view.center
circle.layer.cornerRadius = 50.0
circle.backgroundColor = UIColor.green()
// add pan gesture recognizer to
circle.addGestureRecognizer(UIPanGestureR...
Execute Insert command and return inserted Id in Sql
...E t7;
GO
CREATE TABLE t6(id int IDENTITY);
CREATE TABLE t7(id int IDENTITY(100,1));
GO
CREATE TRIGGER t6ins ON t6 FOR INSERT
AS
BEGIN
INSERT t7 DEFAULT VALUES
END;
GO
--End of trigger definition
SELECT id FROM t6;
--IDs empty.
SELECT id FROM t7;
--ID is empty.
--Do the following in Session 1
...
Sticky sidebar: stick to bottom when scrolling down, top when scrolling up
....header {
background-color: #6289AE;
margin-bottom: 10px;
height: 100px;
}
.sidebar {
position: absolute;
padding: 10px;
background-color: #ccc;
height: 300px;
width: 100px;
float: left;
}
.main {
background-color: #ccc;
height: 600px;
margin-left: 110px;
}
...
Why is enum class preferred over plain enum?
... workmate adds carelessly a new value to our enum:
E_DEVIL_FRUIT = 0x100, // New fruit, with value greater than 8bits
The compiler doesn't complain about it! It just resizes the type to fit all the values of the enum (assuming that the compiler were using the smallest type possible, which is...
Is there a way to detect if a browser window is not currently active?
...he API does not raise events when the visibility cannot be determined with 100% accuracy (e.g. Alt+Tab to switch to another application).
Using focus/blur based methods gives you a lot of false positive. For example, if the user displays a smaller window on top of the browser window, the browser win...
Load and execution sequence of a web page?
...umber of assets in parallel. Steve Souders has been able to download over 100 requests in parallel on IE. The exception is that script requests block parallel asset requests in IE. This is why it is highly suggested to put all JavaScript in external JavaScript files and put the request just prior...
AngularJS : How to watch service variables?
...on(){
self.count++;
$timeout(self.counter, 1000);
}
self.addOneHundred = function(){
self.count+=100;
}
self.counter();
}
return new DemoService();
})
.controller("DemoControll...
Drawing an SVG file on a HTML5 canvas
...VG (string) paths. In other words, you can write:
var path = new Path2D('M 100,100 h 50 v 50 h 50');
ctx.stroke(path);
Live example of that here.
Old posterity answer:
There's nothing native that allows you to natively use SVG paths in canvas. You must convert yourself or use a library to do it fo...