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What does “Receiver type 'CALayer' for instance message is a forward declaration” mean here?
I'm porting a block of code from an iOS4 project to iOS5 and I'm having some troubles with ARC. The code generates a PDF from a screen capture.
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Different results with Java's digest versus external utilities
...ptography;
class Test
{
static void Main()
{
using (var md5 = MD5.Create())
{
string path = "c:/Windows/System32/Calc.exe";
var bytes = md5.ComputeHash(File.ReadAllBytes(path));
Console.WriteLine(BitConverter.ToString(bytes));
}
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Sass and combined child selector
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225
Without the combined child selector you would probably do something similar to this:
foo {
ba...
How to copy from CSV file to PostgreSQL table with headers in CSV file?
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5 Answers
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MySQL get the date n days ago as a timestamp
...you want
mysql> SELECT DATE_SUB(NOW(), INTERVAL 30 day);
2009-06-07 21:55:09
mysql> SELECT TIMESTAMP(DATE_SUB(NOW(), INTERVAL 30 day));
2009-06-07 21:55:09
mysql> SELECT UNIX_TIMESTAMP(DATE_SUB(NOW(), INTERVAL 30 day));
1244433347
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Can I make the foreign key field optional in Django model
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edited Jan 24 '14 at 19:55
akki
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answered Jul 8 '11 at 4:58
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Thread Safety in Python's dictionary
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answered Aug 5 '11 at 11:42
Ned BatchelderNed Batchelder
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How do I query using fields inside the new PostgreSQL JSON datatype?
...Performance benefits from general improvements to GIN indexes.
Postgres 9.5
Complete jsonb functions and operators. Add more functions to manipulate jsonb in place and for display.
Major good news in the release notes of Postgres 9.5.
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Default visibility of class methods in PHP
... keyword are defined as public.
http://www.php.net/manual/en/language.oop5.visibility.php
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Center Google Maps (V3) on browser resize (responsive)
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