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How to tell if a tag failed to load
...
~
If the load resulted in an error (for
example a DNS error, or an HTTP 404
error) Executing the script block must
just consist of firing a simple event
named error at the element.
This means you don't have to do any error prone polling and can combine it with async and defer attribu...
What is the proper way to re-throw an exception in C#? [duplicate]
...should always use "throw;" to rethrow the exceptions in .NET,
Refer this, http://weblogs.asp.net/bhouse/archive/2004/11/30/272297.aspx
Basically MSIL (CIL) has two instructions - "throw" and "rethrow" and C#'s "throw ex;" gets compiled into MSIL's "throw" and C#'s "throw;" - into MSIL "rethrow"! B...
How can I append a string to an existing field in MySQL?
...ld to add full URL, ignoring null fields:
UPDATE test SET image = CONCAT('https://my-site.com/images/',image) WHERE image IS NOT NULL;
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Python set to list
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
How to access parent Iframe from JavaScript
...n your iframe, call:
window.parent.postMessage({message: 'Hello world'}, 'http://localhost/');
In the page you're including the iframe you can listen for events like this:
window.addEventListener('message', function(event) {
if(event.origin === 'http://localhost/')
{
alert('R...
Postgresql SELECT if string contains
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
GitHub relative link in Markdown file
...rk? Here's some Markdown for you.
Instead of an absolute link:
[a link](https://github.com/user/repo/blob/branch/other_file.md)
…you can use a relative link:
[a relative link](other_file.md)
and we'll make sure it gets linked to user/repo/blob/branch/other_file.md.
If you were...
Alias with variable in bash [duplicate]
...source ~/.bashrc
And execute:
$ sendpic filename.jpg
original source: http://www.linuxhowtos.org/Tips%20and%20Tricks/command_aliases.htm
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What is the bit size of long on 64-bit Windows?
...ble on Windows) that are a bit more explicit with respect to their width:
http://msdn.microsoft.com/en-us/library/aa505945.aspx
For instance, although you can use ULONGLONG to reference a 64-bit unsigned integral value, you can also use UINT64. (The same goes for ULONG and UINT32.) Perhaps these...
Check if $_POST exists
...e using method isset is not appropriate.
According to PHP documentation: http://php.net/manual/en/function.array-key-exists.php
(see Example #2 array_key_exists() vs isset())
The method array_key_exists is intended for checking key presence in array.
So code in the question could be changed as f...