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The most sophisticated way for creating comma-separated Strings from a Collection/Array/List?
...ggestion in the question can be written even more clearly and efficiently, by taking care of the redundant trailing comma:
StringBuilder result = new StringBuilder();
for(String string : collectionOfStrings) {
result.append(string);
result.append(",");
}
return resul...
How to add an image to a JPanel?
...e area if it reports being opaque (which is the default), easiest achieved by calling super.paintComponent
– kleopatra
Jul 13 '12 at 9:05
5
...
Navigation bar show/hide
...ithEvent: method and count how many touches you get in a duration of time, by measuring the time between two consecutive taps, perhaps with CACurrentMediaTime(). Or test the result from [touch tapCount].
If you get two taps, your subclassed view issues an NSNotification that your view controller has...
What does @media screen and (max-width: 1024px) mean in CSS?
...screen. Before you use that though, you might want to define what you mean by “desktop” and “mobile”. Is a Microsoft Surface mobile, or desktop? Why? What about future devices that haven’t been invented yet?
– Paul D. Waite
Jul 14 '15 at 12:54
...
If strings are immutable in .NET, then why does Substring take O(n) time?
...name will be a couple dozen. String allocation and memory copying of fifty bytes is astonishingly fast on modern hardware. That making a new data structure that consists of a pointer to the middle of an existing string plus a length is also astonishingly fast is irrelevant; "fast enough" is by defin...
Capture Image from Camera and Display in Activity
...ntentView(R.layout.main);
this.imageView = (ImageView)this.findViewById(R.id.imageView1);
Button photoButton = (Button) this.findViewById(R.id.button1);
photoButton.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(V...
Git for Windows: .bashrc or equivalent configuration files for Git Bash shell
...dd a user environment variable, HOME, with C:\Users\<your user name> by going to System, Advanced System Settings, in the System Properties window, the Advanced tab, Environment Variables...
Then in my C:\Users\<your user name> I created the file .bashrc, e.g., touch .bashrc and added t...
Drop rows with all zeros in pandas data frame
...lumn. With the help of all discussion and answers in this post, I did this by doing df.loc[df.iloc[:, 0] != 0]. Just wanted to share because this problem is related to this question!!
– hemanta
Feb 14 '19 at 4:47
...
How to generate random number in Bash?
...
By moduloing your random input, you are "pigeon-holing" the results. Since $RANDOM's range is 0-32767 the numbers 0-7 map to 3277 different possible inputs, but 8 and 9 can only be produced 3276 different ways (because 32768...
How can I write text on a HTML5 canvas element?
...
var canvas = document.getElementById("my-canvas");
var context = canvas.getContext("2d");
context.fillStyle = "blue";
context.font = "bold 16px Arial";
context.fillText("Zibri", (canvas.width / 2) - 17, (canvas.height / 2) + 8);
#my-canvas {
backg...