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Singleton: How should it be used
...ct of a type in system" - "...and never want to mock that object in a unit test."
– Cygon
Oct 19 '14 at 18:21
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SQL is null and = null [duplicate]
...ows by coding where my_column = null.
SQL provides the special syntax for testing if a column is null, via is null and is not null, which is a special condition to test for a null (or not a null).
Here's some SQL showing a variety of conditions and and their effect as per above.
create table t (x...
Passing arguments to C# generic new() of templated type
... question, but new answer ;-)
The ExpressionTree version: (I think the fastests and cleanest solution)
Like Welly Tambunan said, "we could also use expression tree to build the object"
This will generate a 'constructor' (function) for the type/parameters given. It returns a delegate and accept th...
Eclipse: enable assertions
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If you want to solve this issue globally for all JUnit tests then go to Preferences > Java > JUnit and at the top click the checkbox for "Add 'ea' to VM arguments when creating new JUnit launch configuration" Now Eclipse won't bug you for every new test you want to run. For...
IntelliJ does not show 'Class' when we right click and select 'New'
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If it is your test directory, mark it as the Test Source Root (it will appear in green)
– Arnaud Denoyelle
Sep 17 '13 at 14:25
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POST data with request module on Node.JS
...type' : 'application/x-www-form-urlencoded'},
url: 'http://localhost/test2.php',
body: "mes=heydude"
}, function(error, response, body){
console.log(body);
});
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Checking if an instance's class implements an interface?
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See: http://php.net/manual/en/function.class-implements.php
Performance Tests
Some simple performance tests show the costs of each approach:
Given an instance of an object
Object construction outside the loop (100,000 iterations)
____________________________________________
| class_implement...
Executing elements inserted with .innerHTML
...o it would look like this instead:
<img src="empty.gif" onload="alert('test');this.parentNode.removeChild(this);" />
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How do I determine scrollHeight?
...rollHeight is a regular javascript property so you don't need jQuery.
var test = document.getElementById("foo").scrollHeight;
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C# List of objects, how do I get the sum of a property
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Here is example code you could run to make such test:
var f = 10000000;
var p = new int[f];
for(int i = 0; i < f; ++i)
{
p[i] = i % 2;
}
var time = DateTime.Now;
p.Sum();
Console.WriteLine(DateTime.Now - time);
int x = 0;
time = DateTime.Now;
foreach(var item in...