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How does HashSet compare elements for equality?
...which is only used for comparisons.
Implement equality in the type itself, by overriding GetHashCode and Equals(object). Ideally, implement IEquatable<T> in the type as well, particularly if it's a value type. These methods will be called by the default equality comparer.
Note how none of th...
Are Stored Procedures more efficient, in general, than inline statements on modern RDBMS's? [duplica
...ecade (along with application development in C, PHP, PL/SQL, C#.NET, and Ruby). So, I have no particular axe to grind in this (sometimes) holy war.
The historical performance benefit of stored procs have generally been from the following (in no particular order):
Pre-parsed SQL
Pre-generated que...
What is the difference D3 datum vs. data?
...nly have a single datum element of data bound to it.
selection.datum(data) bypasses the data-join process altogether. This simply assigns the entirety of data to all elements in the selection as a whole without splitting it up as in the case of data-joins. So if you want to bind an entire array data...
Selecting text in an element (akin to highlighting with your mouse)
...Javascript
function selectText(node) {
node = document.getElementById(node);
if (document.body.createTextRange) {
const range = document.body.createTextRange();
range.moveToElementText(node);
range.select();
} else if (window.getSelection) {
...
vbscript output to console
...
If the script is started by double-click and thus opened with wscript, the script results in an error message: "Invalid Handle".
– Bernhard Hiller
Mar 22 '13 at 9:09
...
How to get anchor text/href on click using jQuery?
...var anchor = document.querySelector('a'),
button = document.getElementById('getURL'),
url = anchor.href;
button.addEventListener('click', function (e) {
alert(url);
});
<button id="getURL">Click me!</button>
<a href="/relative/path.html"></a>
...
How to configure an app to run correctly on a machine with a high DPI setting (e.g. 150%)?
...st 100% (or 125% with the "XP-style DPI scaling" checkbox ticked), Windows by default takes over the scaling of your UI. It does so by having your app render its output to a bitmap and drawing that bitmap to the screen. The rescaling of that bitmap makes the text inevitably look fuzzy. A feature ...
Invalid postback or callback argument. Event validation is enabled using '
...
Do you have codes in you Page_Load events? if yes, then perhaps by adding the following will help.
if (!Page.IsPostBack)
{ //do something }
This error is thrown when you click on your command and the Page_load is being ran again, in a normal life cycle will be
Page_Load -> Click on ...
Custom checkbox image android
...
Thanks, I actually found exactly what I needed here it-ride.blogspot.com/2010/04/… but I would have had to do it your way if I wanted a real custom image =P
– Falmarri
Oct 19 '10 at 6:44
...
Troubleshooting “Illegal mix of collations” error in mysql
...
This is generally caused by comparing two strings of incompatible collation or by attempting to select data of different collation into a combined column.
The clause COLLATE allows you to specify the collation used in the query.
For example, the fo...