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What is The Rule of Three?
...rs,
but copying the name member merely copies a pointer, not the character array it points to!
This has several unpleasant effects:
Changes via a can be observed via b.
Once b is destroyed, a.name is a dangling pointer.
If a is destroyed, deleting the dangling pointer yields undefined behavior.
Sin...
What's the u prefix in a Python string?
...thon manifest strings should use the u"" syntax. The "" syntax is for byte arrays, only.
Before the bashing begins, let me explain. Most Python programs start out with using "" for strings. But then they need to support documentation off the Internet, so they start using "".decode and all of a sudd...
Android: Share plain text using intent (to all messaging apps)
...uriToImage)
* .getIntent();
*/
.setEmailTo(arrayOfStringEmailAddresses)
.setEmailTo(singleStringEmailAddress)
/*
* [OPTIONAL] Designate the email recipients as an array
* of Strings or a single String
*/
.setEmailTo(...
How to set a selected option of a dropdown list control using angular JS
...ariant has a value of 0, that item should get selected.
If variants is an array of objects, item.selectedVariant must be set to one of those objects. I do not know which information you have in your scope, but here's an example:
JS:
$scope.options = [{ name: "a", id: 1 }, { name: "b", id: 2 }];
$...
Java: How to convert List to Map
...ors.toMap(Item::getKey, item -> item));
Short demo:
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
public class Test{
public static void main (String [] args){
List<Item> list = IntStream.rangeClosed(1, 4)
...
What is the best way to find the users home directory in Java?
...etProperty("user.home"))
}
else {
val pszPath: Array[Char] = new Array[Char](WinDef.MAX_PATH)
new java.io.File(Shell32.INSTANCE.SHGetSpecialFolderPath(null, pszPath, ShlObj.CSIDL_MYDOCUMENTS, false) match {
case true => new String(pszPath.ta...
How to instantiate a File object in JavaScript?
...w File([""], "filename");
The first argument is the data provided as an array of lines of text;
The second argument is the filename ;
The third argument looks like:
var f = new File([""], "filename.txt", {type: "text/plain", lastModified: date})
It works in FireFox, Chrome and Opera, but not ...
How to get input type using jquery?
... set of input elements that have some value.
You can put the values in an array:
var array = $inputs.map(function(){
return this.value;
}).get();
Or you could serialize them:
var serialized = $inputs.serialize();
s...
How do I create a file and write to it in Java?
...lass to write to files:
Creating a text file:
List<String> lines = Arrays.asList("The first line", "The second line");
Path file = Paths.get("the-file-name.txt");
Files.write(file, lines, StandardCharsets.UTF_8);
//Files.write(file, lines, StandardCharsets.UTF_8, StandardOpenOption.APPEND);
...
Create an empty list in python with certain size
... A variant on the comprehension example. If all elements in the array need to be empty at initialization, use: arr = [None for _ in range(10)].
– Doug R.
Mar 31 '17 at 18:23
...