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Check if UIColor is dark or bright?
...or white text, use the color brightness calculation above. If it is below 125, use white text. If it is 125 or above, use black text.
edit 1: bias towards black text. :)
edit 2: The formula to use is ((Red value * 299) + (Green value * 587) + (Blue value * 114)) / 1000.
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Check that an email address is valid on iOS [duplicate]
...ing
{
BOOL stricterFilter = NO; // Discussion http://blog.logichigh.com/2010/09/02/validating-an-e-mail-address/
NSString *stricterFilterString = @"^[A-Z0-9a-z\\._%+-]+@([A-Za-z0-9-]+\\.)+[A-Za-z]{2,4}$";
NSString *laxString = @"^.+@([A-Za-z0-9-]+\\.)+[A-Za-z]{2}[A-Za-z]*$";
NSString *em...
Convert dmesg timestamp to custom date format
...
182
Understanding dmesg timestamp is pretty simple: it is time in seconds since the kernel started. ...
Simple proof that GUID is not unique [closed]
...ain(string[] args)
{
//var reserveSomeRam = new byte[1024 * 1024 * 100]; // This indeed has no effect.
Console.WriteLine("{0:u} - Building a bigHeapOGuids.", DateTime.Now);
// Fill up memory with guids.
var bigHeapOGuids = new HashSet<G...
TypeError: got multiple values for argument
...
232
This happens when a keyword argument is specified that overwrites a positional argument. For e...
Running a cron job at 2:30 AM everyday
How to configure a cron job to run every night at 2:30? I know how to make it run at 2, but not 2:30.
6 Answers
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Symbolic links and synced folders in Vagrant
...der "virtualbox" do |v|
v.customize ["setextradata", :id, "VBoxInternal2/SharedFoldersEnableSymlinksCreate/v-root", "1"]
end
Additionally, on windows vagrant up needs to be executed in a shell with admin rights.
No workarounds necessary.
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Python strftime - date without leading 0?
... |
edited Apr 8 '17 at 7:42
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answered Jan 15 '10 at 16:38
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