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Regular expression for a hexadecimal number?
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If you're using Perl or PHP, you can replace
[0-9a-fA-F]
with:
[[:xdigit:]]
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Windows batch files: .bat vs .cmd?
... Ben HoffsteinBen Hoffstein
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Test if remote TCP port is open from a shell script
... Brandon RhodesBrandon Rhodes
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How do you convert a byte array to a hexadecimal string, and vice versa?
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Using Substring is the best option in combination with Convert.ToByte. See this answer for more information. If you need better performance, you must avoid Convert.ToByte before you can drop SubString.
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How to display Base64 images in HTML?
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If you have PHP on the back-end, you can use this code:
$image = 'http://images.itracki.com/2011/06/favicon.png';
// Read image path, convert to base64 encoding
$imageData = base64_encode(file_get_contents($image));
// Format the image...
How can I replace a newline (\n) using sed?
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ThorThor
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Singletons vs. Application Context in Android?
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MatthiasMatthias
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typecast string to integer - Postgres
...ing into an integer.
Solution
Create a user-defined function inspired by PHP's intval() function.
CREATE FUNCTION intval(character varying) RETURNS integer AS $$
SELECT
CASE
WHEN length(btrim(regexp_replace($1, '[^0-9]', '','g')))>0 THEN btrim(regexp_replace($1, '[^0-9]', '','g'))::intege...
Sending a notification from a service in Android
...osef Pfleger
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Jquery selector input[type=text]')
... Andreas WongAndreas Wong
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