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Android - Handle “Enter” in an EditText
...ittext = (EditText) findViewById(R.id.edittext);
edittext.setOnKeyListener(new OnKeyListener() {
public boolean onKey(View v, int keyCode, KeyEvent event) {
// If the event is a key-down event on the "enter" button
if ((event.getAction() == KeyEvent.ACTION_DOWN) &&
...
How do I remove an array item in TypeScript?
...cts without a unique key property. @user573434 the filter method returns a new array without the filtered object, so the resulting array does have the object removed.
– Jason
Jun 25 '17 at 3:22
...
HTML5 Pre-resize images before uploading
...= filesToUpload[0];
var img = document.createElement("img");
var reader = new FileReader();
reader.onload = function(e) {img.src = e.target.result}
reader.readAsDataURL(file);
var ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0);
var MAX_WIDTH = 800;
var MAX_HEIGHT = 600;
var width = img...
smart pointers (boost) explained
... can move it by using C++1x's move constructors:
unique_ptr<type> p(new type);
unique_ptr<type> q(p); // not legal!
unique_ptr<type> r(move(p)); // legal. p is now empty, but r owns the object
unique_ptr<type> s(function_returning_a_unique_ptr()); // legal!
This is the sem...
LINQPad [extension] methods [closed]
...lass. This has two purposes: the first is to display ordinary hyperlinks:
new Hyperlinq ("www.linqpad.net").Dump();
new Hyperlinq ("www.linqpad.net", "Web site").Dump();
new Hyperlinq ("mailto:user@domain.com", "Email").Dump();
You can combine this with Util.HorizontalRun:
Util.HorizontalRun (tr...
JavaScript - Getting HTML form values
...would be sent using an HTTP POST) you can use:
JavaScript
const formData = new FormData(document.querySelector('form'))
for (var pair of formData.entries()) {
// console.log(pair[0] + ': ' + pair[1]);
}
form-serialize (https://code.google.com/archive/p/form-serialize/)
serialize(document.forms[0]...
Wrap a delegate in an IEqualityComparer
...o let's use the Comparer<T> class from Aku's answer:
var comparer = new Comparer<Value>((x, y) => x.Name == y.Name);
Now, if we have a bunch of Value elements with the same Name property, they should all collapse into one value returned by Distinct, right? Let's see...
var values ...
RegEx for Javascript to allow only alphanumeric
...indicate a set of characters. ^ is start of input. $ is end of input (or newline, depending on your options). \s is whitespace.
The whitespace before and after is optional.
The parentheses are the grouping operator to allow you to extract the information you want.
EDIT: removed my erroneous us...
What is INSTALL_PARSE_FAILED_NO_CERTIFICATES error?
...ing the wrong signing config. As described here, Android 7.0 introduces a new signature scheme, V2. The V2 scheme signs the entire APK rather than just the JAR, as is done in the V1 scheme. If you sign with only V2, and attempt to install on a pre-7.0 target, you'll get this error since the JARs t...
Possible to do a MySQL foreign key to one of two possible tables?
...ulls. But you still have to hardcode all the joined tables, and if you add new filter tables, you have to update your code.
SELECT * FROM Products
LEFT OUTER JOIN FiltersType1 USING (product_id)
LEFT OUTER JOIN FiltersType2 USING (product_id)
LEFT OUTER JOIN FiltersType3 USING (product_id)
...
An...