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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...
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...
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...
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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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...
Unable to set data attribute using jQuery Data() API
...t'));
$('#changeData').click(function() {
$('#foo').data('helptext', 'Testing 123');
// $('#foo').attr('data-helptext', 'Testing 123');
console.log($('#foo').data('data-helptext'));
return false;
});
See demo
Using the Chrome DevTools Console to inspect the DOM, the $('#foo').data('...
IntelliJ does not show 'Class' when we right click and select 'New'
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If it is your test directory, mark it as the Test Source Root (it will appear in green)
– Arnaud Denoyelle
Sep 17 '13 at 14:25
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How to catch curl errors in PHP
...TTP errors, the following provides a better approach:
function curl_error_test($url) {
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$responseBody = curl_exec($ch);
/*
* if curl_exec failed then
* $responseBody...
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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